Last frost dates in Oklahoma
193 NOAA weather stations in Oklahoma have thirty years of frost records. The median station sees its last 32 °F night around Apr 5; across the state that ranges from Mar 15 to Apr 26, so pick the station nearest you rather than a state-wide figure.
| Plan sowing from this date | ||||||
|---|---|---|---|---|---|---|
| ARDMORE | Mar 15 | Apr 2 | Feb 24 | Nov 14 | 244 | Plan sowing from this date → |
| HUGO | Mar 15 | Apr 4 | Feb 25 | Nov 15 | 244 | Plan sowing from this date → |
| ARDMORE 3ENE MESONET | Mar 18 | Apr 9 | Feb 28 | Nov 10 | 238 | Plan sowing from this date → |
| DURANT 6SSE MESONET | Mar 19 | Apr 7 | Mar 1 | Nov 12 | 237 | Plan sowing from this date → |
| ARDMORE 7WNW MESONET | Mar 21 | Apr 10 | Mar 3 | Nov 8 | 231 | Plan sowing from this date → |
| MEDICINE PK 3W MESONET | Mar 21 | Apr 8 | Feb 28 | Nov 12 | 234 | Plan sowing from this date → |
| MC CURTAIN 1 SE | Mar 23 | Apr 10 | Mar 2 | Nov 5 | 228 | Plan sowing from this date → |
| RINGLING 1N MESONET | Mar 23 | Apr 13 | Mar 3 | Nov 7 | 226 | Plan sowing from this date → |
| MADILL 11WSW MESONET | Mar 24 | Apr 17 | Mar 4 | Nov 6 | 226 | Plan sowing from this date → |
| OKEMAH | Mar 24 | Apr 10 | Mar 5 | Nov 9 | 229 | Plan sowing from this date → |
| WAURIKA | Mar 24 | Apr 8 | Mar 5 | Nov 8 | 228 | Plan sowing from this date → |
| BYARS 3ESE MESONET | Mar 25 | Apr 13 | Mar 3 | Nov 8 | 228 | Plan sowing from this date → |
| DUNCAN | Mar 25 | Apr 12 | Mar 3 | Nov 7 | 225 | Plan sowing from this date → |
| ALTUS AFB | Mar 26 | Apr 14 | Mar 8 | Nov 10 | 229 | Plan sowing from this date → |
| LAWTON | Mar 26 | Apr 14 | Mar 4 | Nov 7 | 225 | Plan sowing from this date → |
| WALTERS 4NW MESONET | Mar 26 | Apr 15 | Mar 3 | Nov 6 | 225 | Plan sowing from this date → |
| MADILL | Mar 27 | Apr 14 | Mar 7 | Nov 8 | 227 | Plan sowing from this date → |
| MCGEE CREEK DAM | Mar 27 | Apr 14 | Mar 5 | Nov 9 | 228 | Plan sowing from this date → |
| PAULS VLY 1SSW MESONET | Mar 28 | Apr 16 | Mar 8 | Nov 7 | 223 | Plan sowing from this date → |
| VELMA 7NW MESONET | Mar 28 | Apr 18 | Mar 6 | Nov 7 | 227 | Plan sowing from this date → |
| WICHITA MTN WR | Mar 28 | Apr 17 | Mar 7 | Nov 6 | 224 | Plan sowing from this date → |
| FITTSTOWN 6SW MESONET | Mar 29 | Apr 18 | Mar 8 | Nov 6 | 222 | Plan sowing from this date → |
| HOLDENVILLE 3ESE MESONET | Mar 29 | Apr 14 | Mar 9 | Nov 5 | 221 | Plan sowing from this date → |
| LANE 1WNW MESONET | Mar 29 | Apr 17 | Mar 7 | Nov 4 | 222 | Plan sowing from this date → |
| TISHOMINGO 6N MESONET | Mar 29 | Apr 16 | Mar 9 | Nov 5 | 222 | Plan sowing from this date → |
| WAGONER | Mar 29 | Apr 14 | Mar 10 | Nov 5 | 223 | Plan sowing from this date → |
| WAURIKA 1ENE MESONET | Mar 29 | Apr 19 | Mar 8 | Nov 5 | 223 | Plan sowing from this date → |
| SALLISAW 2 NW | Mar 30 | Apr 16 | Mar 10 | Nov 7 | 223 | Plan sowing from this date → |
| SHAWNEE 3NNW MESONET | Mar 30 | Apr 16 | Mar 10 | Nov 5 | 221 | Plan sowing from this date → |
| TULSA R L JONES JR AP | Mar 30 | Apr 17 | Mar 10 | Nov 4 | 220 | Plan sowing from this date → |
| ADA 2NNE MESONET | Mar 31 | Apr 18 | Mar 10 | Nov 3 | 216 | Plan sowing from this date → |
| BARNSDALL | Mar 31 | Apr 14 | Mar 12 | Oct 31 | 212 | Plan sowing from this date → |
| BURNEYVILLE 2SE MESONT | Mar 31 | Apr 20 | Mar 9 | Nov 4 | 218 | Plan sowing from this date → |
| CENTRAHOMA 1E MESONET | Mar 31 | Apr 19 | Mar 12 | Nov 1 | 216 | Plan sowing from this date → |
| CENTRAHOMA 2 ESE | Mar 31 | Apr 18 | Mar 9 | Nov 4 | 219 | Plan sowing from this date → |
| COLEMAN 4W | Mar 31 | Apr 18 | Mar 12 | Nov 5 | 221 | Plan sowing from this date → |
| DURANT | Mar 31 | Apr 19 | Mar 10 | Nov 5 | 221 | Plan sowing from this date → |
| GRANDFIELD 3W MESONET | Mar 31 | Apr 18 | Mar 10 | Nov 6 | 219 | Plan sowing from this date → |
| IDABEL | Mar 31 | Apr 18 | Mar 9 | Nov 3 | 221 | Plan sowing from this date → |
| KANSAS 2 NE | Mar 31 | Apr 18 | Mar 13 | Nov 2 | 216 | Plan sowing from this date → |
| MCALESTER RGNL AP | Mar 31 | Apr 18 | Mar 11 | Nov 3 | 216 | Plan sowing from this date → |
| NORMAN 2NW MESONET | Mar 31 | Apr 17 | Mar 12 | Nov 5 | 219 | Plan sowing from this date → |
| STILWELL 5 NNW | Mar 31 | Apr 20 | Mar 10 | Nov 4 | 217 | Plan sowing from this date → |
| TULSA INTL AP | Mar 31 | Apr 15 | Mar 11 | Nov 4 | 220 | Plan sowing from this date → |
| WASHINGTON 6SSW MESONET | Mar 31 | Apr 17 | Mar 12 | Nov 3 | 217 | Plan sowing from this date → |
| BIXBY | Apr 1 | Apr 20 | Mar 12 | Nov 1 | 212 | Plan sowing from this date → |
| BROKEN BOW 1 N | Apr 1 | Apr 17 | Mar 10 | Nov 2 | 220 | Plan sowing from this date → |
| CUSHING | Apr 1 | Apr 17 | Mar 13 | Nov 5 | 217 | Plan sowing from this date → |
| LAWTON MUNI AP | Apr 1 | Apr 19 | Mar 12 | Nov 5 | 217 | Plan sowing from this date → |
| SEMINOLE 4SSW MESONET | Apr 1 | Apr 19 | Mar 12 | Nov 1 | 214 | Plan sowing from this date → |
| WALTERS | Apr 1 | Apr 18 | Mar 13 | Nov 5 | 218 | Plan sowing from this date → |
| ADA | Apr 2 | Apr 18 | Mar 14 | Nov 4 | 217 | Plan sowing from this date → |
| ALTUS DAM | Apr 2 | Apr 21 | Mar 11 | Nov 3 | 213 | Plan sowing from this date → |
| ANTLERS 5NW | Apr 2 | Apr 20 | Mar 14 | Nov 1 | 212 | Plan sowing from this date → |
| CHANDLER 5SE MESONET | Apr 2 | Apr 21 | Mar 10 | Nov 2 | 214 | Plan sowing from this date → |
| MUSKOGEE DAVIS FLD | Apr 2 | Apr 20 | Mar 13 | Nov 2 | 216 | Plan sowing from this date → |
| OKLAHOMA CITY POST AP | Apr 2 | Apr 18 | Mar 14 | Nov 4 | 216 | Plan sowing from this date → |
| SPENCER 2ENE MESONET | Apr 2 | Apr 18 | Mar 12 | Nov 5 | 217 | Plan sowing from this date → |
| WILBURTON 9 ENE | Apr 2 | Apr 19 | Mar 12 | Nov 5 | 218 | Plan sowing from this date → |
| ALTUS 3S MESONET | Apr 3 | Apr 21 | Mar 15 | Nov 4 | 214 | Plan sowing from this date → |
| ANTLERS | Apr 3 | Apr 20 | Mar 15 | Nov 1 | 213 | Plan sowing from this date → |
| APACHE 4ENE MESONET | Apr 3 | Apr 21 | Mar 16 | Nov 3 | 213 | Plan sowing from this date → |
| BESSIE 4WNW MESONET | Apr 3 | Apr 20 | Mar 15 | Nov 1 | 210 | Plan sowing from this date → |
| BLANCHARD 2 SSW | Apr 3 | Apr 19 | Mar 15 | Nov 4 | 214 | Plan sowing from this date → |
| CHEYENNE 6SW MESONET | Apr 3 | Apr 19 | Mar 16 | Nov 3 | 212 | Plan sowing from this date → |
| COYLE 7N MESONET | Apr 3 | Apr 20 | Mar 13 | Nov 1 | 210 | Plan sowing from this date → |
| FREDERICK | Apr 3 | Apr 22 | Mar 13 | Nov 4 | 213 | Plan sowing from this date → |
| GUTHRIE 4WSW MESONET | Apr 3 | Apr 20 | Mar 14 | Nov 4 | 214 | Plan sowing from this date → |
| GUTHRIE MUNI AP | Apr 3 | Apr 20 | Mar 17 | Nov 1 | 211 | Plan sowing from this date → |
| MINCO 2SSW MESONET | Apr 3 | Apr 19 | Mar 17 | Nov 5 | 216 | Plan sowing from this date → |
| NORMAN 3SSE | Apr 3 | Apr 18 | Mar 19 | Nov 3 | 212 | Plan sowing from this date → |
| STILLWATER RGNL AP | Apr 3 | Apr 21 | Mar 18 | Oct 31 | 209 | Plan sowing from this date → |
| TIPTON 4S MESONET | Apr 3 | Apr 21 | Mar 12 | Nov 6 | 217 | Plan sowing from this date → |
| WEATHERFORD | Apr 3 | Apr 21 | Mar 16 | Nov 3 | 214 | Plan sowing from this date → |
| ACME MESONET | Apr 4 | Apr 23 | Mar 16 | Oct 31 | 210 | Plan sowing from this date → |
| CHICKASAW NRA | Apr 4 | Apr 22 | Mar 16 | Oct 31 | 208 | Plan sowing from this date → |
| CHICKASHA EXP STATION | Apr 4 | Apr 20 | Mar 20 | Nov 1 | 211 | Plan sowing from this date → |
| HOBART MUNI AP | Apr 4 | Apr 21 | Mar 15 | Nov 4 | 214 | Plan sowing from this date → |
| MEEKER 5 W | Apr 4 | Apr 21 | Mar 19 | Oct 30 | 208 | Plan sowing from this date → |
| NOWATA | Apr 4 | Apr 21 | Mar 20 | Nov 1 | 210 | Plan sowing from this date → |
| OKLAHOMA CITY WILL ROGERS AP | Apr 4 | Apr 20 | Mar 16 | Nov 2 | 213 | Plan sowing from this date → |
| PERKINS 2NNW MESONET | Apr 4 | Apr 20 | Mar 15 | Nov 2 | 212 | Plan sowing from this date → |
| PERRY | Apr 4 | Apr 20 | Mar 20 | Nov 1 | 210 | Plan sowing from this date → |
| PURCELL 2 SW | Apr 4 | Apr 24 | Mar 18 | Nov 2 | 210 | Plan sowing from this date → |
| SULPHUR 4NNE MESONET | Apr 4 | Apr 24 | Mar 15 | Nov 1 | 212 | Plan sowing from this date → |
| TAHLEQUAH | Apr 4 | Apr 24 | Mar 17 | Oct 31 | 209 | Plan sowing from this date → |
| ALTUS IRIG RSCH STN | Apr 5 | Apr 21 | Mar 20 | Nov 2 | 210 | Plan sowing from this date → |
| ATOKA | Apr 5 | Apr 22 | Mar 17 | Nov 1 | 211 | Plan sowing from this date → |
| CLINTON SHERMAN AP | Apr 5 | Apr 22 | Mar 19 | Nov 4 | 210 | Plan sowing from this date → |
| ELK CITY 4 W | Apr 5 | Apr 24 | Mar 17 | Nov 2 | 208 | Plan sowing from this date → |
| FAIRVIEW 1W MESONET | Apr 5 | Apr 20 | Mar 20 | Nov 1 | 208 | Plan sowing from this date → |
| FORT COBB 4NNW MESONET | Apr 5 | Apr 23 | Mar 17 | Nov 3 | 210 | Plan sowing from this date → |
| GREAT SALT PLAINS DAM | Apr 5 | Apr 20 | Mar 19 | Nov 1 | 209 | Plan sowing from this date → |
| HINTON 7W MESONET | Apr 5 | Apr 22 | Mar 20 | Nov 1 | 208 | Plan sowing from this date → |
| HOLLIS 5E MESONET | Apr 5 | Apr 21 | Mar 18 | Oct 31 | 208 | Plan sowing from this date → |
| PAULS VALLEY 4 WSW | Apr 5 | Apr 21 | Mar 19 | Nov 1 | 210 | Plan sowing from this date → |
| PRYOR | Apr 5 | Apr 21 | Mar 19 | Oct 30 | 207 | Plan sowing from this date → |
| SEMINOLE | Apr 5 | Apr 22 | Mar 18 | Nov 1 | 210 | Plan sowing from this date → |
| STILLWATER 2 W | Apr 5 | Apr 21 | Mar 21 | Oct 30 | 206 | Plan sowing from this date → |
| WOODWARD 2WSW MESONET | Apr 5 | Apr 23 | Mar 19 | Oct 30 | 206 | Plan sowing from this date → |
| CARNEGIE 5 NE | Apr 6 | Apr 22 | Mar 20 | Oct 31 | 206 | Plan sowing from this date → |
| CHICKASHA 2SSE MESONET | Apr 6 | Apr 21 | Mar 20 | Nov 1 | 207 | Plan sowing from this date → |
| EL RENO 1 N | Apr 6 | Apr 22 | Mar 21 | Oct 31 | 206 | Plan sowing from this date → |
| ENID | Apr 6 | Apr 21 | Mar 20 | Nov 1 | 209 | Plan sowing from this date → |
| GEARY | Apr 6 | Apr 23 | Mar 21 | Nov 5 | 212 | Plan sowing from this date → |
| HEALDTON 3 E | Apr 6 | Apr 25 | Mar 20 | Nov 1 | 204 | Plan sowing from this date → |
| HOLDENVILLE 2SSE | Apr 6 | Apr 24 | Mar 19 | Oct 31 | 206 | Plan sowing from this date → |
| MANNFORD 6 NW | Apr 6 | Apr 23 | Mar 19 | Oct 29 | 207 | Plan sowing from this date → |
| MARIETTA 5SW | Apr 6 | Apr 24 | Mar 16 | Nov 2 | 211 | Plan sowing from this date → |
| MIAMI | Apr 6 | Apr 26 | Mar 20 | Oct 27 | 203 | Plan sowing from this date → |
| NEWKIRK 8E MESONET | Apr 6 | Apr 23 | Mar 20 | Oct 30 | 206 | Plan sowing from this date → |
| PAWHUSKA | Apr 6 | Apr 23 | Mar 21 | Oct 29 | 204 | Plan sowing from this date → |
| STILLWATER MESONET | Apr 6 | Apr 21 | Mar 20 | Oct 31 | 208 | Plan sowing from this date → |
| WATONGA 7W MESONET | Apr 6 | Apr 22 | Mar 20 | Nov 3 | 211 | Plan sowing from this date → |
| WEATHERFORD 4WSW MESNT | Apr 6 | Apr 23 | Mar 20 | Nov 3 | 210 | Plan sowing from this date → |
| WEBBERS FALLS 5 WSW | Apr 6 | Apr 24 | Mar 19 | Oct 30 | 206 | Plan sowing from this date → |
| WISTER 3S | Apr 6 | Apr 24 | Mar 18 | Nov 2 | 210 | Plan sowing from this date → |
| CHANDLER | Apr 7 | Apr 23 | Mar 23 | Oct 30 | 205 | Plan sowing from this date → |
| CHATTANOOGA | Apr 7 | Apr 24 | Mar 21 | Nov 2 | 205 | Plan sowing from this date → |
| CLAREMORE 2 ENE | Apr 7 | Apr 24 | Mar 20 | Oct 30 | 205 | Plan sowing from this date → |
| HOBART 4SE MESONET | Apr 7 | Apr 22 | Mar 19 | Nov 4 | 209 | Plan sowing from this date → |
| MUSKOGEE | Apr 7 | Apr 26 | Mar 20 | Oct 30 | 208 | Plan sowing from this date → |
| OKEENE | Apr 7 | Apr 24 | Mar 20 | Nov 2 | 208 | Plan sowing from this date → |
| SPAVINAW | Apr 7 | Apr 24 | Mar 22 | Nov 2 | 209 | Plan sowing from this date → |
| ANADARKO 3 E | Apr 8 | Apr 25 | Mar 24 | Oct 30 | 202 | Plan sowing from this date → |
| BLACKWELL 4SSE MESONET | Apr 8 | Apr 24 | Mar 22 | Oct 27 | 201 | Plan sowing from this date → |
| FREEDOM 16NNE MESONET | Apr 8 | Apr 23 | Mar 24 | Oct 29 | 203 | Plan sowing from this date → |
| KINGFISHER | Apr 8 | Apr 24 | Mar 23 | Nov 1 | 206 | Plan sowing from this date → |
| MANGUM | Apr 8 | Apr 24 | Mar 21 | Nov 2 | 207 | Plan sowing from this date → |
| OKMULGEE WTR WKS | Apr 8 | Apr 25 | Mar 23 | Oct 28 | 203 | Plan sowing from this date → |
| PUTNAM 3N MESONET | Apr 8 | Apr 24 | Mar 21 | Nov 1 | 204 | Plan sowing from this date → |
| RED ROCK 7SSE MESONET | Apr 8 | Apr 24 | Mar 22 | Oct 28 | 202 | Plan sowing from this date → |
| STILLWATER 2 W | Apr 8 | Apr 25 | Mar 25 | Oct 27 | 201 | Plan sowing from this date → |
| ARNETT 8WSW MESONET | Apr 9 | Apr 25 | Mar 23 | Oct 27 | 200 | Plan sowing from this date → |
| BRISTOW | Apr 9 | Apr 27 | Mar 24 | Oct 25 | 196 | Plan sowing from this date → |
| BUTLER 5SW MESONET | Apr 9 | Apr 24 | Mar 25 | Oct 28 | 199 | Plan sowing from this date → |
| HELENA 1 SSE | Apr 9 | Apr 23 | Mar 25 | Oct 31 | 205 | Plan sowing from this date → |
| KINGFISHER 1W MESONET | Apr 9 | Apr 25 | Mar 24 | Nov 1 | 204 | Plan sowing from this date → |
| SMITHVILLE | Apr 9 | Apr 24 | Mar 23 | Oct 29 | 201 | Plan sowing from this date → |
| ALVA 1W | Apr 10 | Apr 25 | Mar 26 | Oct 28 | 199 | Plan sowing from this date → |
| BRECKINRIDGE 3SE MESNT | Apr 10 | Apr 25 | Mar 25 | Oct 29 | 202 | Plan sowing from this date → |
| CHEROKEE 1SSW MESONET | Apr 10 | Apr 26 | Mar 26 | Oct 29 | 201 | Plan sowing from this date → |
| GUTHRIE 5S | Apr 10 | Apr 30 | Mar 24 | Oct 28 | 199 | Plan sowing from this date → |
| HOLLIS 5E | Apr 10 | Apr 24 | Mar 27 | Oct 28 | 200 | Plan sowing from this date → |
| LAHOMA 1WSW MESONET | Apr 10 | Apr 25 | Mar 24 | Oct 31 | 204 | Plan sowing from this date → |
| MANGUM 5SE MESONET | Apr 10 | Apr 27 | Mar 26 | Oct 29 | 201 | Plan sowing from this date → |
| MEDFORD 1SW MESONET | Apr 10 | Apr 27 | Mar 26 | Oct 28 | 199 | Plan sowing from this date → |
| ORLANDO 5E MESONET | Apr 10 | Apr 29 | Mar 24 | Oct 25 | 198 | Plan sowing from this date → |
| PONCA CITY MUNI AP | Apr 10 | Apr 27 | Mar 25 | Oct 27 | 200 | Plan sowing from this date → |
| ALVA 7SSW MESONET | Apr 11 | Apr 26 | Mar 26 | Oct 26 | 198 | Plan sowing from this date → |
| BARTLESVILLE 3 | Apr 11 | Apr 30 | Mar 27 | Oct 24 | 195 | Plan sowing from this date → |
| ERICK | Apr 11 | Apr 29 | Mar 27 | Oct 26 | 197 | Plan sowing from this date → |
| MARSHALL 3SSE MESONET | Apr 11 | Apr 29 | Mar 24 | Oct 31 | 201 | Plan sowing from this date → |
| RALSTON | Apr 11 | Apr 27 | Mar 26 | Oct 24 | 196 | Plan sowing from this date → |
| SEILING 7WNW MESONET | Apr 11 | Apr 26 | Mar 26 | Oct 25 | 194 | Plan sowing from this date → |
| TUSKAHOMA | Apr 11 | Apr 27 | Mar 25 | Oct 27 | 199 | Plan sowing from this date → |
| BARTLESVILLE F P FLD | Apr 12 | Apr 28 | Mar 28 | Oct 21 | 192 | Plan sowing from this date → |
| BLACKWELL 1SSW | Apr 12 | Apr 28 | Mar 26 | Oct 29 | 199 | Plan sowing from this date → |
| EL RENO 5 WNW MESONET | Apr 12 | Apr 25 | Mar 28 | Oct 27 | 196 | Plan sowing from this date → |
| ERICK 4ESE MESONET | Apr 12 | Apr 28 | Mar 26 | Oct 28 | 197 | Plan sowing from this date → |
| STILLWATER 5 WNW | Apr 12 | Apr 27 | Mar 28 | Oct 27 | 199 | Plan sowing from this date → |
| WAYNOKA | Apr 12 | Apr 27 | Mar 27 | Oct 24 | 192 | Plan sowing from this date → |
| BATTIEST | Apr 13 | Apr 29 | Mar 28 | Oct 27 | 196 | Plan sowing from this date → |
| BUFFALO 1SW MESONET | Apr 13 | Apr 29 | Mar 30 | Oct 25 | 195 | Plan sowing from this date → |
| CLINTON | Apr 13 | Apr 27 | Mar 31 | Oct 28 | 197 | Plan sowing from this date → |
| FREEDOM 3SSW MESONET | Apr 13 | Apr 30 | Mar 27 | Oct 27 | 198 | Plan sowing from this date → |
| GATE | Apr 13 | Apr 27 | Mar 30 | Oct 28 | 196 | Plan sowing from this date → |
| LINDSAY 2 W | Apr 13 | Apr 28 | Mar 29 | Oct 27 | 196 | Plan sowing from this date → |
| HENNESSEY 4 ESE | Apr 14 | Apr 27 | Mar 29 | Oct 30 | 198 | Plan sowing from this date → |
| WATONGA | Apr 14 | Apr 29 | Mar 30 | Oct 27 | 194 | Plan sowing from this date → |
| ARNETT 3NE | Apr 15 | Apr 29 | Apr 1 | Oct 27 | 194 | Plan sowing from this date → |
| BILLINGS | Apr 15 | May 1 | Mar 29 | Oct 26 | 194 | Plan sowing from this date → |
| CAMARGO 4WNW MESONET | Apr 15 | Apr 30 | Mar 31 | Oct 23 | 189 | Plan sowing from this date → |
| CHEROKEE 4W | Apr 15 | Apr 28 | Apr 1 | Oct 29 | 196 | Plan sowing from this date → |
| HAMMON 3 SSW | Apr 16 | May 2 | Mar 31 | Oct 23 | 191 | Plan sowing from this date → |
| HOOKER | Apr 16 | May 1 | Apr 1 | Oct 25 | 192 | Plan sowing from this date → |
| NEWKIRK 5NE | Apr 16 | Apr 30 | Mar 31 | Oct 26 | 192 | Plan sowing from this date → |
| UPPER SPAVINAW PORT | Apr 16 | May 1 | Mar 31 | Oct 20 | 187 | Plan sowing from this date → |
| BUFFALO 2 SSW | Apr 17 | Apr 30 | Apr 3 | Oct 23 | 187 | Plan sowing from this date → |
| GAGE AP | Apr 17 | May 2 | Apr 1 | Oct 20 | 185 | Plan sowing from this date → |
| TURPIN 4 SSE | Apr 17 | May 1 | Apr 3 | Oct 25 | 189 | Plan sowing from this date → |
| GOODWELL 2 SE | Apr 18 | May 3 | Apr 3 | Oct 24 | 186 | Plan sowing from this date → |
| GUYMON MUNI AP | Apr 18 | May 1 | Apr 4 | Oct 23 | 188 | Plan sowing from this date → |
| JEFFERSON 3SE | Apr 18 | May 2 | Apr 4 | Oct 20 | 183 | Plan sowing from this date → |
| TALOGA | Apr 18 | Apr 30 | Apr 3 | Oct 21 | 185 | Plan sowing from this date → |
| FREEDOM | Apr 19 | May 2 | Apr 4 | Oct 17 | 179 | Plan sowing from this date → |
| MUTUAL | Apr 19 | May 3 | Apr 1 | Oct 26 | 188 | Plan sowing from this date → |
| KENTON | Apr 20 | May 4 | Apr 5 | Oct 20 | 179 | Plan sowing from this date → |
| BEAVER | Apr 21 | May 4 | Apr 7 | Oct 21 | 181 | Plan sowing from this date → |
| FT SUPPLY 3SE | Apr 21 | May 5 | Apr 8 | Oct 19 | 179 | Plan sowing from this date → |
| GOODWELL 2 E | Apr 22 | May 5 | Apr 8 | Oct 22 | 182 | Plan sowing from this date → |
| GOODWELL RSCH STN | Apr 24 | May 6 | Apr 8 | Oct 19 | 178 | Plan sowing from this date → |
| BOISE CITY 2 E | Apr 26 | May 9 | Apr 10 | Oct 17 | 173 | 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.