Last frost dates in Utah
169 NOAA weather stations in Utah have thirty years of frost records. The median station sees its last 32 °F night around May 11; across the state that ranges from Mar 9 to Jun 21, so pick the station nearest you rather than a state-wide figure.
| Plan sowing from this date | ||||||
|---|---|---|---|---|---|---|
| HITE RS | Mar 9 | Apr 5 | Feb 16 | Nov 20 | 253 | Plan sowing from this date → |
| ST GEORGE | Mar 14 | Apr 6 | Feb 27 | Nov 10 | 239 | Plan sowing from this date → |
| LYTLE RCH | Mar 18 | Apr 16 | Feb 23 | Nov 9 | 234 | Plan sowing from this date → |
| BULLFROG BASIN | Mar 25 | Apr 12 | Mar 8 | Nov 10 | 227 | Plan sowing from this date → |
| VALLEY OF THE GODS | Mar 29 | Apr 15 | Mar 8 | Nov 6 | 223 | Plan sowing from this date → |
| SALT LAKE TRIAD CTR | Mar 31 | Apr 19 | Mar 7 | Nov 8 | 224 | Plan sowing from this date → |
| LA VERKIN | Apr 1 | Apr 24 | Mar 5 | Nov 5 | 217 | Plan sowing from this date → |
| ARCHES NP HQS | Apr 2 | Apr 23 | Mar 10 | Oct 30 | 207 | Plan sowing from this date → |
| GARFIELD | Apr 3 | Apr 19 | Mar 11 | Nov 4 | 213 | Plan sowing from this date → |
| BIG WATER | Apr 8 | Apr 28 | Mar 19 | Nov 1 | 204 | Plan sowing from this date → |
| SALT LAKE CITY INTL AP | Apr 8 | Apr 30 | Mar 17 | Oct 31 | 204 | Plan sowing from this date → |
| VEYO POWERHOUSE | Apr 9 | Apr 28 | Mar 18 | Nov 5 | 207 | Plan sowing from this date → |
| MEXICAN HAT | Apr 11 | Apr 26 | Mar 27 | Oct 30 | 201 | Plan sowing from this date → |
| MOAB | Apr 11 | Apr 28 | Mar 25 | Oct 23 | 192 | Plan sowing from this date → |
| ZION NP | Apr 13 | May 2 | Mar 22 | Nov 2 | 202 | Plan sowing from this date → |
| CASTLE VALLEY | Apr 17 | May 3 | Apr 1 | Oct 23 | 185 | Plan sowing from this date → |
| PLEASANT GROVE | Apr 17 | May 7 | Mar 30 | Oct 25 | 188 | Plan sowing from this date → |
| CAPITOL REEF NP | Apr 18 | May 3 | Mar 29 | Oct 28 | 192 | Plan sowing from this date → |
| DRAPER-POINT OF MTN | Apr 18 | May 6 | Mar 31 | Oct 22 | 185 | Plan sowing from this date → |
| GRANITE PEAK DUGWAY PG | Apr 18 | May 5 | Apr 2 | Oct 16 | 179 | Plan sowing from this date → |
| PROVO BYU | Apr 18 | May 5 | Mar 31 | Oct 21 | 185 | Plan sowing from this date → |
| WENDOVER AP AWOS | Apr 18 | May 5 | Mar 31 | Oct 23 | 188 | Plan sowing from this date → |
| CASTLE VALLEY 1SE | Apr 19 | May 3 | Apr 4 | Oct 21 | 184 | Plan sowing from this date → |
| FARMINGTON 3 NW | Apr 19 | May 7 | Apr 1 | Oct 19 | 181 | Plan sowing from this date → |
| OGDEN NE BENCH | Apr 19 | May 4 | Apr 2 | Oct 22 | 186 | Plan sowing from this date → |
| OREM TRTMT PLT | Apr 19 | May 9 | Apr 2 | Oct 19 | 182 | Plan sowing from this date → |
| PARIA RS | Apr 19 | May 9 | Apr 1 | Oct 23 | 186 | Plan sowing from this date → |
| OGDEN PIONEER PH | Apr 21 | May 6 | Apr 2 | Oct 23 | 184 | Plan sowing from this date → |
| MOAB CANYONLAND AP | Apr 22 | May 8 | Apr 7 | Oct 20 | 179 | Plan sowing from this date → |
| OGDEN HINKLEY AP | Apr 22 | May 10 | Apr 4 | Oct 22 | 180 | Plan sowing from this date → |
| OGDEN SUGAR FACTORY | Apr 22 | May 9 | Apr 5 | Oct 18 | 177 | Plan sowing from this date → |
| TORREY 7 E | Apr 22 | May 9 | Apr 4 | Oct 23 | 183 | Plan sowing from this date → |
| BLUFF | Apr 24 | May 9 | Apr 8 | Oct 13 | 172 | Plan sowing from this date → |
| BOUNTIFUL-VAL VERDA | Apr 24 | May 14 | Apr 5 | Oct 19 | 178 | Plan sowing from this date → |
| TREMONTON | Apr 24 | May 9 | Apr 8 | Oct 17 | 175 | Plan sowing from this date → |
| BOUNTIFUL BENCH | Apr 25 | May 14 | Apr 5 | Oct 24 | 181 | Plan sowing from this date → |
| CANYONLANDS-THE NECK | Apr 25 | May 13 | Apr 6 | Oct 23 | 180 | Plan sowing from this date → |
| SALT LAKE CITY E BENCH | Apr 25 | May 10 | Apr 7 | Oct 18 | 175 | Plan sowing from this date → |
| SPANISH FK PWR HOUSE | Apr 25 | May 13 | Apr 10 | Oct 18 | 174 | Plan sowing from this date → |
| FISH SPRINGS NWR | Apr 26 | May 17 | Apr 9 | Oct 14 | 169 | Plan sowing from this date → |
| GOBLIN VALLEY SP | Apr 26 | May 10 | Apr 10 | Oct 18 | 173 | Plan sowing from this date → |
| SUNNYSIDE CITY | Apr 26 | May 18 | Apr 8 | Oct 25 | 181 | Plan sowing from this date → |
| DEWEY | Apr 27 | May 9 | Apr 13 | Oct 9 | 165 | Plan sowing from this date → |
| BLANDING | Apr 28 | May 16 | Apr 13 | Oct 21 | 174 | Plan sowing from this date → |
| COTTONWOOD WEIR | Apr 29 | May 30 | Apr 10 | Oct 22 | 174 | Plan sowing from this date → |
| KANAB | Apr 29 | May 18 | Apr 12 | Oct 22 | 175 | Plan sowing from this date → |
| WEBER BASIN PUMP PLT 3 | Apr 29 | May 25 | Apr 6 | Oct 20 | 172 | Plan sowing from this date → |
| CANYONLANDS-THE NEEDLES | Apr 30 | May 16 | Apr 16 | Oct 11 | 164 | Plan sowing from this date → |
| KANOSH | Apr 30 | May 21 | Apr 13 | Oct 19 | 172 | Plan sowing from this date → |
| LOGAN UTAH ST UNIV | Apr 30 | May 19 | Apr 14 | Oct 16 | 166 | Plan sowing from this date → |
| UTAH LAKE LEHI | Apr 30 | May 27 | Apr 14 | Oct 9 | 159 | Plan sowing from this date → |
| DINOSAUR NM-QUARRY AREA | May 1 | May 23 | Apr 18 | Oct 6 | 156 | Plan sowing from this date → |
| HANS FLAT RS | May 1 | May 24 | Apr 18 | Oct 16 | 163 | Plan sowing from this date → |
| GRANTSVILLE 2W | May 2 | May 19 | Apr 17 | Oct 14 | 164 | Plan sowing from this date → |
| HOVENWEEP NM | May 2 | May 21 | Apr 19 | Oct 10 | 159 | Plan sowing from this date → |
| OAK CITY | May 2 | May 21 | Apr 18 | Oct 13 | 162 | Plan sowing from this date → |
| OURAY 4NE | May 2 | May 16 | Apr 19 | Oct 3 | 152 | Plan sowing from this date → |
| TIMPANOGOS CAVE | May 2 | May 26 | Apr 17 | Oct 16 | 161 | Plan sowing from this date → |
| TOOELE | May 2 | May 28 | Apr 16 | Oct 16 | 165 | Plan sowing from this date → |
| ALPINE | May 3 | May 26 | Apr 18 | Oct 12 | 159 | Plan sowing from this date → |
| CUTLER DAM | May 3 | May 24 | Apr 17 | Oct 12 | 160 | Plan sowing from this date → |
| PRICE CARBON CO AP | May 3 | May 21 | Apr 20 | Oct 12 | 160 | Plan sowing from this date → |
| BOULDER | May 4 | May 25 | Apr 20 | Oct 14 | 160 | Plan sowing from this date → |
| CEDAR CITY | May 4 | May 28 | Apr 19 | Oct 13 | 159 | Plan sowing from this date → |
| FILLMORE | May 4 | May 26 | Apr 18 | Oct 14 | 160 | Plan sowing from this date → |
| SANTAQUIN CHLORINATOR | May 4 | May 28 | Apr 18 | Oct 11 | 157 | Plan sowing from this date → |
| BRIGHAM CITY WASTE PLT | May 5 | May 29 | Apr 20 | Oct 5 | 150 | Plan sowing from this date → |
| HANKSVILLE | May 5 | May 23 | Apr 22 | Oct 3 | 149 | Plan sowing from this date → |
| NATURAL BRIDGES NM | May 5 | May 27 | Apr 22 | Oct 13 | 157 | Plan sowing from this date → |
| SUNNYSIDE CITY CTR | May 5 | May 26 | Apr 21 | Oct 15 | 159 | Plan sowing from this date → |
| DUCHESNE | May 6 | May 26 | Apr 22 | Oct 5 | 150 | Plan sowing from this date → |
| FERRON | May 6 | May 27 | Apr 22 | Oct 10 | 156 | Plan sowing from this date → |
| NEPHI | May 6 | May 24 | Apr 21 | Oct 10 | 156 | Plan sowing from this date → |
| VERNAL MUNICIPAL AP | May 6 | May 25 | Apr 21 | Oct 7 | 153 | Plan sowing from this date → |
| MTN DELL DAM | May 7 | May 27 | Apr 21 | Oct 14 | 158 | Plan sowing from this date → |
| MYTON | May 7 | May 25 | Apr 23 | Oct 5 | 149 | Plan sowing from this date → |
| VERNAL | May 7 | May 28 | Apr 24 | Oct 6 | 150 | Plan sowing from this date → |
| ESCALANTE | May 8 | May 24 | Apr 22 | Oct 10 | 155 | Plan sowing from this date → |
| LOGAN CACHE AP | May 8 | May 29 | Apr 24 | Oct 2 | 144 | Plan sowing from this date → |
| LOGAN RADIO KVNU | May 8 | Jun 2 | Apr 25 | Oct 2 | 145 | Plan sowing from this date → |
| NEW HARMONY | May 9 | May 29 | Apr 23 | Oct 11 | 155 | Plan sowing from this date → |
| LEVAN | May 10 | May 31 | Apr 26 | Oct 7 | 148 | Plan sowing from this date → |
| MILFORD | May 10 | Jun 1 | Apr 25 | Oct 2 | 144 | Plan sowing from this date → |
| DUGWAY | May 11 | May 29 | Apr 25 | Oct 2 | 143 | Plan sowing from this date → |
| MANTI | May 11 | Jun 1 | Apr 25 | Oct 6 | 146 | Plan sowing from this date → |
| RICHMOND | May 11 | Jun 2 | Apr 27 | Oct 5 | 143 | Plan sowing from this date → |
| BRIGHAM CITY 28 WNW | May 12 | Jun 8 | Apr 27 | Oct 5 | 144 | Plan sowing from this date → |
| ESKDALE | May 12 | Jun 3 | Apr 28 | Oct 1 | 140 | Plan sowing from this date → |
| LOGAN 5 SW EXP FARM | May 12 | May 29 | Apr 30 | Sep 28 | 138 | Plan sowing from this date → |
| CITY CREEK WTP | May 13 | May 31 | Apr 27 | Oct 7 | 146 | Plan sowing from this date → |
| MILFORD MUNI AP | May 13 | Jun 2 | Apr 27 | Oct 4 | 143 | Plan sowing from this date → |
| PARTOUN | May 13 | Jun 5 | Apr 28 | Sep 29 | 137 | Plan sowing from this date → |
| CALLAO | May 14 | Jun 4 | Apr 29 | Sep 28 | 135 | Plan sowing from this date → |
| DESERET | May 14 | May 31 | Apr 29 | Sep 30 | 137 | Plan sowing from this date → |
| BEAR LAKE SP | May 15 | Jun 5 | Apr 30 | Oct 4 | 140 | Plan sowing from this date → |
| JOHNSON PASS | May 15 | Jun 4 | Apr 27 | Oct 5 | 142 | Plan sowing from this date → |
| LITTLE SAHARA REC AREA | May 15 | Jun 5 | Apr 30 | Oct 1 | 137 | Plan sowing from this date → |
| MAESER 9NW | May 15 | Jun 7 | Apr 29 | Oct 5 | 143 | Plan sowing from this date → |
| ORDERVILLE | May 15 | Jun 4 | Apr 30 | Oct 8 | 144 | Plan sowing from this date → |
| UTAH TEST RANGE | May 15 | Jun 4 | Apr 29 | Oct 2 | 139 | Plan sowing from this date → |
| CEDAR PT | May 16 | Jun 2 | Apr 30 | Oct 11 | 145 | Plan sowing from this date → |
| DELTA | May 16 | Jun 5 | Apr 29 | Sep 29 | 137 | Plan sowing from this date → |
| LA SAL 1SW | May 17 | Jun 5 | Apr 30 | Oct 6 | 141 | Plan sowing from this date → |
| MONTICELLO #2 | May 17 | Jun 4 | May 2 | Oct 7 | 141 | Plan sowing from this date → |
| SUNDANCE | May 17 | Jun 8 | May 1 | Oct 5 | 138 | Plan sowing from this date → |
| THIOKOL PROPULSION F S | May 17 | Jun 8 | May 5 | Sep 24 | 128 | Plan sowing from this date → |
| TRENTON | May 17 | Jun 6 | May 3 | Sep 18 | 121 | Plan sowing from this date → |
| CASTLE DALE | May 18 | Jun 8 | May 4 | Sep 27 | 128 | Plan sowing from this date → |
| FT DUCHESNE | May 19 | Jun 15 | May 1 | Oct 2 | 135 | Plan sowing from this date → |
| JARVIE RCH | May 19 | Jun 4 | May 2 | Sep 28 | 132 | Plan sowing from this date → |
| MONTICELLO 2E | May 19 | Jun 6 | May 3 | Oct 2 | 133 | Plan sowing from this date → |
| NEOLA | May 19 | Jun 7 | May 4 | Sep 29 | 130 | Plan sowing from this date → |
| WAH WAH RCH | May 19 | Jun 11 | Apr 30 | Sep 29 | 131 | Plan sowing from this date → |
| JENSEN | May 20 | Jun 5 | May 5 | Sep 25 | 126 | Plan sowing from this date → |
| MODENA | May 20 | Jun 6 | May 2 | Oct 3 | 136 | Plan sowing from this date → |
| CEDAR CITY MUNI AP | May 21 | Jun 8 | May 4 | Sep 29 | 130 | Plan sowing from this date → |
| ENTERPRISE | May 21 | Jun 7 | May 4 | Oct 2 | 132 | Plan sowing from this date → |
| RICHFIELD RADIO KSVC | May 21 | Jun 7 | May 4 | Sep 24 | 125 | Plan sowing from this date → |
| ROSETTE | May 21 | Jun 11 | May 2 | Oct 2 | 132 | Plan sowing from this date → |
| MANILA | May 22 | Jun 11 | May 4 | Sep 29 | 128 | Plan sowing from this date → |
| PINEVIEW DAM | May 22 | Jun 8 | May 7 | Sep 26 | 125 | Plan sowing from this date → |
| SCIPIO | May 22 | Jun 10 | May 5 | Sep 25 | 122 | Plan sowing from this date → |
| BLACK ROCK | May 23 | Jun 11 | May 5 | Sep 27 | 124 | Plan sowing from this date → |
| BRYCE CANYON NP HQRS | May 23 | Jun 9 | May 8 | Sep 27 | 125 | Plan sowing from this date → |
| CEDAR CITY 5E | May 23 | Jun 8 | May 5 | Oct 4 | 130 | Plan sowing from this date → |
| CIRCLEVILLE | May 23 | Jun 13 | May 4 | Sep 27 | 125 | Plan sowing from this date → |
| ROOSEVELT RADIO | May 23 | Jun 9 | May 9 | Sep 22 | 121 | Plan sowing from this date → |
| MARYSVALE | May 24 | Jun 10 | May 6 | Sep 25 | 123 | Plan sowing from this date → |
| EDEN-LIBERTY | May 25 | Jun 16 | May 4 | Sep 26 | 123 | Plan sowing from this date → |
| MORGAN | May 25 | Jun 13 | May 7 | Sep 24 | 119 | Plan sowing from this date → |
| FLAMING GORGE | May 26 | Jun 10 | May 9 | Sep 23 | 120 | Plan sowing from this date → |
| MORONI | May 26 | Jun 13 | May 10 | Sep 25 | 119 | Plan sowing from this date → |
| WELLINGTON 3 E | May 27 | Jun 11 | May 11 | Sep 26 | 122 | Plan sowing from this date → |
| DEER CREEK DAM | May 28 | Jun 15 | May 11 | Sep 23 | 119 | Plan sowing from this date → |
| EPHRAIM | May 28 | Jun 15 | May 12 | Sep 20 | 113 | Plan sowing from this date → |
| LAKETOWN | May 28 | Jun 17 | May 10 | Sep 24 | 119 | Plan sowing from this date → |
| PARK CITY | May 29 | Jun 14 | May 12 | Sep 25 | 117 | Plan sowing from this date → |
| SALINA 24 E | May 29 | Jun 15 | May 12 | Sep 26 | 118 | Plan sowing from this date → |
| ECHO DAM | May 30 | Jun 16 | May 11 | Sep 18 | 112 | Plan sowing from this date → |
| ALTAMONT | May 31 | Jun 16 | May 16 | Sep 23 | 112 | Plan sowing from this date → |
| ENTERPRISE BERYL JCT | May 31 | Jun 20 | May 16 | Sep 20 | 110 | Plan sowing from this date → |
| KODACHROME BASIN PARK | May 31 | Jun 18 | May 13 | Sep 28 | 116 | Plan sowing from this date → |
| LOA | May 31 | Jun 14 | May 15 | Sep 21 | 112 | Plan sowing from this date → |
| MANTI RADIO KMTI | May 31 | Jun 16 | May 12 | Sep 21 | 114 | Plan sowing from this date → |
| SNAKE CREEK POWERHOUSE | May 31 | Jun 23 | May 13 | Sep 11 | 101 | Plan sowing from this date → |
| ALTON | Jun 1 | Jun 15 | May 16 | Sep 30 | 120 | Plan sowing from this date → |
| BEAVER CANYON PWR HOUSE | Jun 1 | Jun 15 | May 15 | Sep 28 | 120 | Plan sowing from this date → |
| VERNON | Jun 1 | Jun 19 | May 18 | Sep 20 | 110 | Plan sowing from this date → |
| FAIRFIELD | Jun 2 | Jun 24 | May 18 | Sep 16 | 103 | Plan sowing from this date → |
| FREMONT INDIAN SP | Jun 4 | Jun 21 | May 19 | Sep 21 | 106 | Plan sowing from this date → |
| GROUSE CREEK | Jun 4 | Jun 22 | May 17 | Sep 17 | 104 | Plan sowing from this date → |
| HEBER | Jun 4 | Jun 21 | May 18 | Sep 20 | 106 | Plan sowing from this date → |
| HUNTSVILLE MONASTERY | Jun 4 | Jun 22 | May 15 | Sep 16 | 102 | Plan sowing from this date → |
| KAMAS | Jun 5 | Jun 23 | May 20 | Sep 17 | 100 | Plan sowing from this date → |
| KOOSHAREM | Jun 6 | Jun 26 | May 24 | Sep 21 | 104 | Plan sowing from this date → |
| BLOWHARD MTN RADAR | Jun 7 | Jun 22 | May 25 | Sep 29 | 110 | Plan sowing from this date → |
| COALVILLE | Jun 7 | Jun 25 | May 21 | Sep 12 | 95 | Plan sowing from this date → |
| ALTA | Jun 11 | Jun 27 | May 26 | Sep 18 | 98 | Plan sowing from this date → |
| CEDAR BREAKS NM | Jun 11 | Jun 27 | May 15 | Oct 3 | 113 | Plan sowing from this date → |
| MOON LAKE | Jun 11 | Jun 24 | May 29 | Sep 18 | 97 | Plan sowing from this date → |
| WANSHIP DAM | Jun 11 | Jun 30 | May 21 | Sep 12 | 92 | Plan sowing from this date → |
| PANGUITCH | Jun 12 | Jun 27 | May 31 | Sep 12 | 90 | Plan sowing from this date → |
| SCOFIELD-SKYLINE MINE | Jun 13 | Jun 30 | May 29 | Sep 17 | 94 | Plan sowing from this date → |
| IBAPAH | Jun 14 | Jul 1 | May 23 | Sep 8 | 86 | Plan sowing from this date → |
| RANDOLPH | Jun 14 | Jun 30 | May 31 | Sep 1 | 76 | Plan sowing from this date → |
| SCOFIELD DAM | Jun 15 | Jul 1 | Jun 2 | Sep 12 | 87 | Plan sowing from this date → |
| ANGLE | Jun 17 | Jul 3 | May 31 | Sep 12 | 85 | Plan sowing from this date → |
| HATCH | Jun 19 | Jul 2 | Jun 5 | Sep 13 | 83 | Plan sowing from this date → |
| BRIAN HEAD | Jun 21 | Jul 6 | Jun 6 | Sep 12 | 82 | 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.