Last frost dates in Michigan
211 NOAA weather stations in Michigan have thirty years of frost records. The median station sees its last 32 °F night around May 8; across the state that ranges from Apr 17 to Jun 7, so pick the station nearest you rather than a state-wide figure.
| Plan sowing from this date | ||||||
|---|---|---|---|---|---|---|
| S HAVEN | Apr 17 | May 4 | Apr 3 | Nov 5 | 201 | Plan sowing from this date → |
| PORT HURON | Apr 19 | May 4 | Apr 7 | Nov 3 | 196 | Plan sowing from this date → |
| DETROIT METRO AP | Apr 20 | May 8 | Apr 6 | Oct 27 | 188 | Plan sowing from this date → |
| DETROIT CITY AP | Apr 21 | May 6 | Apr 7 | Oct 31 | 190 | Plan sowing from this date → |
| EAU CLAIRE 4 NE | Apr 22 | May 7 | Apr 6 | Oct 30 | 189 | Plan sowing from this date → |
| MONROE | Apr 23 | May 7 | Apr 8 | Oct 23 | 182 | Plan sowing from this date → |
| DETROIT WILLOW RUN AP | Apr 24 | May 11 | Apr 10 | Oct 24 | 179 | Plan sowing from this date → |
| MILAN WWTP | Apr 26 | May 9 | Apr 13 | Oct 19 | 175 | Plan sowing from this date → |
| PONTIAC WWTP | Apr 26 | May 12 | Apr 15 | Oct 22 | 177 | Plan sowing from this date → |
| SAGINAW MBS INTL AP | Apr 26 | May 13 | Apr 13 | Oct 17 | 172 | Plan sowing from this date → |
| ADRIAN LENAWEE CO AP | Apr 27 | May 14 | Apr 13 | Oct 20 | 173 | Plan sowing from this date → |
| CARLETON 2W | Apr 27 | May 13 | Apr 12 | Oct 20 | 176 | Plan sowing from this date → |
| DEARBORN #2 | Apr 27 | May 11 | Apr 12 | Oct 25 | 181 | Plan sowing from this date → |
| DUNDEE | Apr 27 | May 13 | Apr 14 | Oct 21 | 176 | Plan sowing from this date → |
| ESSEXVILLE | Apr 27 | May 11 | Apr 15 | Oct 20 | 173 | Plan sowing from this date → |
| HOLLAND WTP | Apr 27 | May 12 | Apr 13 | Oct 25 | 178 | Plan sowing from this date → |
| NEWPORT 4SSE | Apr 27 | May 12 | Apr 12 | Oct 22 | 177 | Plan sowing from this date → |
| NILES | Apr 27 | May 14 | Apr 10 | Oct 25 | 180 | Plan sowing from this date → |
| EAST LANSING 4 S | Apr 28 | May 16 | Apr 13 | Oct 17 | 173 | Plan sowing from this date → |
| HOLLAND TULIP CITY AP | Apr 28 | May 16 | Apr 13 | Oct 21 | 175 | Plan sowing from this date → |
| KALAMAZOO BATTLE CK INTL AP | Apr 28 | May 13 | Apr 13 | Oct 18 | 172 | Plan sowing from this date → |
| PORT HOPE | Apr 28 | May 14 | Apr 13 | Nov 3 | 187 | Plan sowing from this date → |
| SAINT JOHNS | Apr 28 | May 12 | Apr 12 | Oct 24 | 179 | Plan sowing from this date → |
| BLISSFIELD 1NNE | Apr 29 | May 15 | Apr 15 | Oct 13 | 168 | Plan sowing from this date → |
| GRAND RAPIDS | Apr 29 | May 15 | Apr 14 | Oct 20 | 174 | Plan sowing from this date → |
| GROSSE POINTE FARMS | Apr 29 | May 13 | Apr 15 | Oct 22 | 176 | Plan sowing from this date → |
| GULL LAKE BIOLOGICAL STN | Apr 29 | May 18 | Apr 12 | Oct 20 | 173 | Plan sowing from this date → |
| MIDLAND | Apr 29 | May 16 | Apr 16 | Oct 16 | 167 | Plan sowing from this date → |
| PONTIAC OAKLAND CO INTL AP | Apr 29 | May 14 | Apr 16 | Oct 20 | 172 | Plan sowing from this date → |
| SAGINAW #3 | Apr 29 | May 13 | Apr 14 | Oct 21 | 175 | Plan sowing from this date → |
| BATTLE CREEK KELLOGG AP | Apr 30 | May 17 | Apr 16 | Oct 19 | 170 | Plan sowing from this date → |
| CENTRAL MICHIGAN UNIV | Apr 30 | May 16 | Apr 17 | Oct 20 | 171 | Plan sowing from this date → |
| CHELSEA | Apr 30 | May 17 | Apr 18 | Oct 12 | 163 | Plan sowing from this date → |
| EATON RAPIDS | Apr 30 | May 16 | Apr 16 | Oct 14 | 165 | Plan sowing from this date → |
| GRAND HAVEN WWTP | Apr 30 | May 16 | Apr 17 | Oct 24 | 175 | Plan sowing from this date → |
| HELL | Apr 30 | May 17 | Apr 16 | Oct 14 | 166 | Plan sowing from this date → |
| MANCHESTER | Apr 30 | May 16 | Apr 16 | Oct 14 | 165 | Plan sowing from this date → |
| MT CLEMENS ANG BASE | Apr 30 | May 15 | Apr 16 | Oct 24 | 174 | Plan sowing from this date → |
| MUSKEGON CO AP | Apr 30 | May 18 | Apr 17 | Oct 19 | 170 | Plan sowing from this date → |
| NW MICHIGAN RSCH FARM | Apr 30 | May 15 | Apr 16 | Nov 1 | 182 | Plan sowing from this date → |
| NWSFO GRAND RAPIDS | Apr 30 | May 17 | Apr 16 | Oct 14 | 167 | Plan sowing from this date → |
| THREE RIVERS | Apr 30 | May 15 | Apr 16 | Oct 17 | 170 | Plan sowing from this date → |
| ADRIAN 2 NNE | May 1 | May 17 | Apr 18 | Oct 15 | 164 | Plan sowing from this date → |
| ALMA | May 1 | May 19 | Apr 17 | Oct 13 | 164 | Plan sowing from this date → |
| CHARLEVOIX | May 1 | May 16 | Apr 18 | Oct 28 | 178 | Plan sowing from this date → |
| CHARLOTTE | May 1 | May 18 | Apr 19 | Oct 15 | 164 | Plan sowing from this date → |
| DEARBORN | May 1 | May 18 | Apr 17 | Oct 15 | 166 | Plan sowing from this date → |
| FARMINGTON | May 1 | May 16 | Apr 19 | Oct 17 | 165 | Plan sowing from this date → |
| GOODRICH | May 1 | May 18 | Apr 20 | Oct 14 | 164 | Plan sowing from this date → |
| JACKSON REYNOLDS FLD | May 1 | May 18 | Apr 16 | Oct 14 | 164 | Plan sowing from this date → |
| LANSING CAPITAL CITY AP | May 1 | May 18 | Apr 18 | Oct 13 | 162 | Plan sowing from this date → |
| OWOSSO WWTP | May 1 | May 17 | Apr 17 | Oct 15 | 164 | Plan sowing from this date → |
| RICHMOND 4 NNW | May 1 | May 17 | Apr 18 | Oct 20 | 170 | Plan sowing from this date → |
| COLDWATER ST SCHOOL | May 2 | May 18 | Apr 18 | Oct 13 | 163 | Plan sowing from this date → |
| FRANKFORT 2NE | May 2 | May 20 | Apr 19 | Oct 26 | 175 | Plan sowing from this date → |
| HARBOR BEACH 1 SSE | May 2 | May 17 | Apr 19 | Oct 24 | 173 | Plan sowing from this date → |
| SALINE 4SW | May 2 | May 18 | Apr 19 | Oct 11 | 160 | Plan sowing from this date → |
| SALINE WWTP | May 2 | May 18 | Apr 17 | Oct 11 | 160 | Plan sowing from this date → |
| SANDUSKY | May 2 | May 17 | Apr 19 | Oct 16 | 165 | Plan sowing from this date → |
| ALGONAC WWTP | May 3 | May 23 | Apr 20 | Oct 18 | 167 | Plan sowing from this date → |
| ANN ARBOR U OF MICH | May 3 | May 20 | Apr 20 | Oct 13 | 160 | Plan sowing from this date → |
| AUBURN 2NE | May 3 | May 23 | Apr 20 | Oct 14 | 161 | Plan sowing from this date → |
| DURAND WWTP | May 3 | May 19 | Apr 21 | Oct 11 | 159 | Plan sowing from this date → |
| FLINT 7W | May 3 | May 20 | Apr 20 | Oct 13 | 162 | Plan sowing from this date → |
| FRANKENMUTH 1SE | May 3 | May 20 | Apr 19 | Oct 12 | 161 | Plan sowing from this date → |
| HASTINGS | May 3 | May 22 | Apr 20 | Oct 12 | 158 | Plan sowing from this date → |
| HILLSDALE | May 3 | May 19 | Apr 20 | Oct 12 | 161 | Plan sowing from this date → |
| IONIA 2SSW | May 3 | May 21 | Apr 17 | Oct 12 | 161 | Plan sowing from this date → |
| LINDEN WWTP | May 3 | May 20 | Apr 21 | Oct 12 | 161 | Plan sowing from this date → |
| MILAN 4 ESE | May 3 | May 25 | Apr 17 | Oct 10 | 158 | Plan sowing from this date → |
| TECUMSEH | May 3 | May 18 | Apr 20 | Oct 13 | 160 | Plan sowing from this date → |
| ALLEGAN 5NE | May 4 | May 22 | Apr 22 | Oct 15 | 160 | Plan sowing from this date → |
| BENTON HARBOR AP | May 4 | May 22 | Apr 19 | Oct 17 | 164 | Plan sowing from this date → |
| DOWAGIAC 1 W | May 4 | May 22 | Apr 21 | Oct 11 | 158 | Plan sowing from this date → |
| HOWELL WWTP | May 4 | May 21 | Apr 20 | Oct 7 | 156 | Plan sowing from this date → |
| LAPEER 2W | May 4 | May 21 | Apr 21 | Oct 13 | 161 | Plan sowing from this date → |
| LAPEER WWTP | May 4 | May 22 | Apr 22 | Oct 14 | 160 | Plan sowing from this date → |
| LEXINGTON WTP | May 4 | May 20 | Apr 20 | Oct 24 | 171 | Plan sowing from this date → |
| MORENCI | May 4 | May 19 | Apr 22 | Oct 7 | 156 | Plan sowing from this date → |
| PORT AUSTIN WWTP | May 4 | May 19 | Apr 20 | Oct 26 | 172 | Plan sowing from this date → |
| ALPENA WWTP | May 5 | May 21 | Apr 21 | Oct 17 | 163 | Plan sowing from this date → |
| ANN ARBOR SE | May 5 | May 20 | Apr 21 | Oct 10 | 157 | Plan sowing from this date → |
| BAD AXE | May 5 | May 20 | Apr 22 | Oct 19 | 163 | Plan sowing from this date → |
| BENTON HARBOR AP | May 5 | May 26 | Apr 20 | Oct 15 | 161 | Plan sowing from this date → |
| CORUNNA 2 NE | May 5 | May 20 | Apr 20 | Oct 14 | 160 | Plan sowing from this date → |
| DETOUR VILLAGE | May 5 | May 20 | Apr 24 | Oct 20 | 167 | Plan sowing from this date → |
| PORT HOPE | May 5 | May 21 | Apr 21 | Oct 24 | 169 | Plan sowing from this date → |
| STANDISH 4NE | May 5 | May 23 | Apr 21 | Oct 10 | 156 | Plan sowing from this date → |
| TIPTON 2WNW | May 5 | May 23 | Apr 22 | Oct 10 | 157 | Plan sowing from this date → |
| WHITMORE LAKE 1NW | May 5 | May 21 | Apr 22 | Oct 13 | 160 | Plan sowing from this date → |
| BATTLE CREEK 5NW | May 6 | May 23 | Apr 21 | Oct 12 | 158 | Plan sowing from this date → |
| E GRAND RAPIDS | May 6 | May 23 | Apr 24 | Oct 10 | 157 | Plan sowing from this date → |
| FLINT BISHOP INTL AP | May 6 | May 23 | Apr 21 | Oct 10 | 155 | Plan sowing from this date → |
| MILFORD GM PROVING GROUND | May 6 | May 22 | Apr 21 | Oct 12 | 157 | Plan sowing from this date → |
| PETOSKEY | May 6 | May 21 | Apr 23 | Oct 20 | 166 | Plan sowing from this date → |
| BEULAH 7SSW | May 7 | May 25 | Apr 23 | Oct 20 | 163 | Plan sowing from this date → |
| BLOOMINGDALE | May 7 | May 22 | Apr 23 | Oct 11 | 156 | Plan sowing from this date → |
| CARO WWTP | May 7 | May 24 | Apr 24 | Oct 9 | 154 | Plan sowing from this date → |
| CASS CITY 1 SSW | May 7 | May 22 | Apr 25 | Oct 10 | 152 | Plan sowing from this date → |
| ST IGNACE MACKINAC BR | May 7 | May 22 | Apr 25 | Oct 23 | 167 | Plan sowing from this date → |
| ANN ARBOR MUNI AP | May 8 | May 26 | Apr 23 | Oct 4 | 147 | Plan sowing from this date → |
| BURTON 4N | May 8 | May 22 | Apr 28 | Oct 5 | 148 | Plan sowing from this date → |
| E TAWAS | May 8 | May 26 | Apr 26 | Oct 5 | 148 | Plan sowing from this date → |
| FILION 5NNW | May 8 | May 22 | Apr 24 | Oct 17 | 162 | Plan sowing from this date → |
| FREMONT 4 WSW | May 8 | May 25 | Apr 24 | Oct 11 | 155 | Plan sowing from this date → |
| HARRISVILLE 2NNE | May 8 | May 24 | Apr 26 | Oct 16 | 160 | Plan sowing from this date → |
| MARQUETTE | May 8 | May 23 | Apr 26 | Oct 21 | 164 | Plan sowing from this date → |
| GLADWIN | May 9 | May 23 | Apr 26 | Oct 4 | 148 | Plan sowing from this date → |
| MANISTIQUE WWTP | May 9 | May 23 | Apr 27 | Oct 10 | 154 | Plan sowing from this date → |
| NORTHPORT 2W | May 9 | May 24 | Apr 24 | Oct 26 | 169 | Plan sowing from this date → |
| SAULT STE MARIE SANDERSON FLD | May 9 | May 27 | Apr 27 | Oct 11 | 151 | Plan sowing from this date → |
| TRAVERSE CITY MUNSON | May 9 | May 23 | Apr 26 | Oct 15 | 156 | Plan sowing from this date → |
| VASSAR | May 9 | May 24 | Apr 26 | Oct 7 | 150 | Plan sowing from this date → |
| COPPER HARBOR | May 10 | Jun 2 | Apr 26 | Oct 21 | 161 | Plan sowing from this date → |
| ROGERS CITY | May 10 | May 24 | Apr 28 | Oct 14 | 154 | Plan sowing from this date → |
| WHITE LAKE 4E | May 10 | May 26 | Apr 25 | Oct 6 | 148 | Plan sowing from this date → |
| ATLANTA 5 WNW | May 11 | May 31 | Apr 27 | Oct 6 | 146 | Plan sowing from this date → |
| CHEBOYGAN | May 11 | May 25 | Apr 29 | Oct 11 | 152 | Plan sowing from this date → |
| ST JAMES 4SSW BEAVER | May 11 | May 26 | Apr 27 | Oct 19 | 159 | Plan sowing from this date → |
| GAYLORD 9SSW | May 12 | May 29 | Apr 27 | Oct 7 | 147 | Plan sowing from this date → |
| HART 3 WSW | May 12 | May 28 | Apr 25 | Oct 10 | 151 | Plan sowing from this date → |
| TRAVERSE CITY CHERRY CPTL AP | May 12 | May 27 | Apr 26 | Oct 16 | 155 | Plan sowing from this date → |
| YALE 1 NNW | May 12 | May 26 | Apr 29 | Oct 5 | 147 | Plan sowing from this date → |
| ALPENA 10NW | May 13 | May 30 | Apr 30 | Oct 3 | 141 | Plan sowing from this date → |
| BIG RAPIDS WTP | May 13 | May 28 | Apr 28 | Oct 2 | 142 | Plan sowing from this date → |
| ESCANABA | May 13 | May 31 | Apr 30 | Oct 7 | 147 | Plan sowing from this date → |
| KI SAWYER WWTP | May 13 | May 29 | Apr 28 | Oct 2 | 141 | Plan sowing from this date → |
| OLD MISSION 3SSW | May 13 | May 29 | Apr 28 | Oct 19 | 158 | Plan sowing from this date → |
| KENT CITY 2 SW | May 14 | May 31 | Apr 29 | Sep 29 | 135 | Plan sowing from this date → |
| MANISTEE 3SE | May 14 | May 31 | Apr 27 | Oct 12 | 151 | Plan sowing from this date → |
| CADILLAC 9&10 NEWS | May 15 | May 30 | Apr 30 | Oct 1 | 139 | Plan sowing from this date → |
| CROSS VILLAGE 1E | May 15 | May 30 | Apr 30 | Oct 16 | 152 | Plan sowing from this date → |
| GAYLORD 9 SSW | May 15 | May 30 | Apr 28 | Oct 7 | 145 | Plan sowing from this date → |
| OIL CITY 2S | May 15 | Jun 2 | Apr 30 | Sep 29 | 134 | Plan sowing from this date → |
| W BRANCH 3SE | May 15 | May 29 | Apr 29 | Oct 4 | 143 | Plan sowing from this date → |
| E JORDAN 2NW | May 16 | May 30 | Apr 29 | Oct 6 | 144 | Plan sowing from this date → |
| GARDEN CORNERS | May 16 | Jun 3 | May 1 | Sep 24 | 129 | Plan sowing from this date → |
| HALE LOUD DAM | May 16 | May 30 | May 1 | Oct 5 | 143 | Plan sowing from this date → |
| MUNISING | May 16 | Jun 2 | May 1 | Oct 14 | 148 | Plan sowing from this date → |
| PETOSKEY NCMC | May 16 | May 31 | Apr 30 | Oct 9 | 147 | Plan sowing from this date → |
| ST IGNACE | May 16 | May 29 | Apr 30 | Oct 13 | 149 | Plan sowing from this date → |
| ALPENA CO RGNL AP | May 17 | May 31 | May 1 | Oct 1 | 136 | Plan sowing from this date → |
| COVINGTON 1NNW | May 17 | May 30 | May 2 | Sep 30 | 134 | Plan sowing from this date → |
| HANCOCK HOUGHTON CO AP | May 17 | Jun 3 | May 1 | Oct 1 | 138 | Plan sowing from this date → |
| HESPERIA 4 WNW | May 17 | Jun 1 | Apr 30 | Oct 1 | 137 | Plan sowing from this date → |
| IRON MTN-KINGSFORD WWTP | May 17 | May 31 | May 2 | Oct 1 | 135 | Plan sowing from this date → |
| LUDINGTON 4 SE | May 17 | Jun 1 | Apr 28 | Oct 7 | 144 | Plan sowing from this date → |
| GREENVILLE 2 NNE | May 18 | Jun 3 | Apr 29 | Sep 28 | 133 | Plan sowing from this date → |
| RAPID RVR 4SSE | May 18 | Jun 2 | May 3 | Oct 4 | 137 | Plan sowing from this date → |
| CADILLAC | May 19 | Jun 3 | May 2 | Oct 1 | 135 | Plan sowing from this date → |
| CORNELL 5SE | May 19 | Jun 3 | May 2 | Oct 1 | 133 | Plan sowing from this date → |
| GLENNIE 2SE | May 19 | Jun 2 | May 3 | Sep 29 | 133 | Plan sowing from this date → |
| HOUGHTON LK ROSCOMMON AP | May 19 | Jun 3 | Apr 30 | Sep 23 | 125 | Plan sowing from this date → |
| IRONWOOD #2 | May 19 | Jun 3 | May 2 | Sep 28 | 130 | Plan sowing from this date → |
| MIO HYDRO PLT | May 19 | May 31 | May 1 | Oct 2 | 136 | Plan sowing from this date → |
| MONTAGUE 4 NW | May 19 | Jun 6 | May 1 | Oct 4 | 136 | Plan sowing from this date → |
| COPPER HARBOR FT WILKINS | May 20 | Jun 3 | May 3 | Oct 15 | 148 | Plan sowing from this date → |
| HOUGHTON LAKE 2NW | May 20 | Jun 3 | May 2 | Oct 1 | 136 | Plan sowing from this date → |
| IRONWOOD | May 20 | Jun 3 | May 2 | Oct 1 | 132 | Plan sowing from this date → |
| MIO WWTP | May 20 | Jun 2 | May 2 | Oct 1 | 133 | Plan sowing from this date → |
| LUPTON 1S | May 21 | Jun 5 | May 5 | Sep 29 | 129 | Plan sowing from this date → |
| NEWBERRY CORRECTIONAL FACILITY | May 21 | Jun 4 | May 4 | Oct 5 | 135 | Plan sowing from this date → |
| PELLSTON AP #2 | May 21 | Jun 5 | May 4 | Sep 27 | 128 | Plan sowing from this date → |
| TROUT LAKE 1SW | May 21 | Jun 5 | May 4 | Oct 1 | 131 | Plan sowing from this date → |
| ATLANTA | May 22 | Jun 5 | May 5 | Sep 27 | 127 | Plan sowing from this date → |
| BIG BAY 1NW | May 22 | Jun 5 | May 3 | Oct 6 | 137 | Plan sowing from this date → |
| GAYLORD OTSEGO CO AP | May 22 | Jun 6 | May 2 | Sep 30 | 130 | Plan sowing from this date → |
| LAKE CITY EXP FARM | May 22 | Jun 6 | May 8 | Sep 26 | 125 | Plan sowing from this date → |
| MAPLE CITY 1E | May 22 | Jun 6 | May 4 | Oct 9 | 140 | Plan sowing from this date → |
| MARQUETTE | May 22 | Jun 4 | May 6 | Sep 29 | 129 | Plan sowing from this date → |
| ONAWAY 4N | May 22 | Jun 2 | May 3 | Oct 2 | 135 | Plan sowing from this date → |
| SAULT STE MARIE | May 22 | Jun 4 | May 5 | Oct 4 | 136 | Plan sowing from this date → |
| STEPHENSON 5WSW | May 22 | Jun 4 | May 7 | Sep 27 | 126 | Plan sowing from this date → |
| ALBERTA FORD FOR CTR | May 23 | Jun 8 | May 4 | Oct 1 | 128 | Plan sowing from this date → |
| BOYNE FALLS | May 23 | Jun 6 | May 4 | Oct 3 | 133 | Plan sowing from this date → |
| E JORDAN | May 23 | Jun 6 | May 5 | Oct 2 | 131 | Plan sowing from this date → |
| GRAYLING | May 23 | Jun 7 | May 6 | Sep 27 | 124 | Plan sowing from this date → |
| GREENLAND 6N | May 23 | Jun 8 | May 6 | Oct 1 | 128 | Plan sowing from this date → |
| HALE 5SSW #2 | May 23 | Jun 7 | May 5 | Sep 26 | 127 | Plan sowing from this date → |
| MORAN | May 23 | Jun 6 | May 6 | Sep 30 | 130 | Plan sowing from this date → |
| MUNSING LAKESHORE | May 23 | Jun 8 | May 7 | Oct 10 | 138 | Plan sowing from this date → |
| WHITEFISH PT | May 23 | Jun 8 | May 7 | Oct 15 | 144 | Plan sowing from this date → |
| FIFE LAKE 2WNW | May 24 | Jun 6 | May 7 | Oct 1 | 130 | Plan sowing from this date → |
| KALKASKA | May 24 | Jun 7 | May 7 | Oct 1 | 128 | Plan sowing from this date → |
| RUDYARD 4N | May 24 | Jun 10 | May 8 | Oct 1 | 127 | Plan sowing from this date → |
| S BOARDMAN 2W | May 24 | Jun 8 | May 3 | Oct 4 | 133 | Plan sowing from this date → |
| BARAGA 7NW | May 25 | Jun 9 | May 9 | Sep 23 | 119 | Plan sowing from this date → |
| GAYLORD | May 25 | Jun 8 | May 8 | Sep 26 | 125 | Plan sowing from this date → |
| IRON MTN FORD AP | May 25 | Jun 6 | May 10 | Sep 24 | 121 | Plan sowing from this date → |
| WATTON 2WSW | May 25 | Jun 11 | May 7 | Sep 25 | 123 | Plan sowing from this date → |
| BERGLAND DAM | May 26 | Jun 8 | May 9 | Sep 27 | 123 | Plan sowing from this date → |
| ENGADINE MDOT | May 26 | Jun 10 | May 12 | Sep 30 | 127 | Plan sowing from this date → |
| ISHPEMING WWTP | May 26 | Jun 8 | May 10 | Sep 25 | 119 | Plan sowing from this date → |
| CHATHAM 1 SE | May 27 | Jun 12 | May 11 | Sep 28 | 124 | Plan sowing from this date → |
| GRAND MARAIS 2 E | May 27 | Jun 13 | May 7 | Oct 10 | 138 | Plan sowing from this date → |
| KALKASKA 11SE | May 27 | Jun 13 | May 8 | Sep 22 | 117 | Plan sowing from this date → |
| ONTONAGON 6 SE | May 27 | Jun 13 | May 7 | Oct 1 | 127 | Plan sowing from this date → |
| WELLSTON 1N | May 28 | Jun 13 | May 13 | Sep 25 | 119 | Plan sowing from this date → |
| CHATHAM EXP FARM 2 | May 30 | Jun 21 | May 14 | Sep 27 | 119 | Plan sowing from this date → |
| HOUGHTON LAKE 6 WSW | May 30 | Jun 19 | May 12 | Sep 15 | 106 | Plan sowing from this date → |
| HERMAN | May 31 | Jun 17 | May 12 | Sep 22 | 115 | Plan sowing from this date → |
| PARADISE | May 31 | Jun 16 | May 15 | Oct 1 | 122 | Plan sowing from this date → |
| PAULDING | May 31 | Jun 13 | May 16 | Sep 19 | 111 | Plan sowing from this date → |
| PELLSTON RGNL AP | May 31 | Jun 21 | May 16 | Sep 18 | 108 | Plan sowing from this date → |
| PICKFORD 3NE | May 31 | Jun 14 | May 14 | Sep 25 | 116 | Plan sowing from this date → |
| JACOBSVILLE | Jun 1 | Jun 17 | May 14 | Sep 23 | 115 | Plan sowing from this date → |
| RUDYARD 5SE | Jun 1 | Jun 20 | May 18 | Sep 21 | 110 | Plan sowing from this date → |
| STAMBAUGH 2SSE | Jun 4 | Jun 26 | May 22 | Sep 10 | 95 | Plan sowing from this date → |
| CLARKSBURG | Jun 5 | Jun 24 | May 23 | Sep 10 | 96 | Plan sowing from this date → |
| AMASA 1W | Jun 6 | Jul 7 | May 23 | Sep 9 | 94 | Plan sowing from this date → |
| VANDERBILT 11ENE | Jun 7 | Jun 29 | May 23 | Sep 14 | 95 | Plan sowing from this date → |
How to read the three dates
Average is the date by which, in half of the years between 1991 and 2020, the last 32 °F night had already happened. Safe is later: only one year in ten saw a frost after it, which is the date to transplant tomatoes and peppers, both killed by a single frost. Early is the risky end, with a frost after it in nine years out of ten.
Every figure is for the weather station, not for your garden. A valley bottom, a north slope or a spot near a lake can run a week or two either way. Cities are warmer than the countryside around them.
Where the numbers come from
The dates are NOAA's U.S. Climate Normals for 1991 to 2020, computed by the National Centers for Environmental Information for every station with thirty years of daily minimum temperatures. ZIP codes are matched to the nearest such station within 150 km using U.S. Census Bureau ZIP Code Tabulation Area centroids. Stations that never see a frost, such as much of south Florida, report no date and are left out.