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South Dakota frost dates by weather station
South Dakota has 167 NOAA weather stations with 1991–2020 freeze statistics. Median last spring frost dates run from Apr 26 at Sioux Falls WFO Airport to Jun 1 at Hill City.
- 167Stations
- Apr 26Earliest last frostSioux Falls WFO Airport
- Jun 1Latest last frostHill City
- 169 daysLongest growing seasonSioux Falls WFO Airport
| Station | Last spring frost | First fall frost | Growing season | Elevation |
|---|---|---|---|---|
| Aberdeen | May 9 | Sep 26 | 139 days | 1,302 ft |
| Aberdeen 3 E | May 8 | Sep 29 | 144 days | 1,301 ft |
| Aberdeen 35 WNW | May 10 | Sep 30 | 143 days | 1,957 ft |
| Academy 2ne | Apr 30 | Oct 8 | 159 days | 1,681 ft |
| Alexandria | May 8 | Sep 29 | 143 days | 1,365 ft |
| Andover #2 | May 6 | Oct 4 | 150 days | 1,478 ft |
| Antelope Ranger Station | May 19 | Sep 19 | 121 days | 2,820 ft |
| Ardmore 1 NW | May 16 | Sep 23 | 128 days | 3,540 ft |
| Arlington 1 W | May 3 | Oct 2 | 151 days | 1,824 ft |
| Armour | May 3 | Oct 6 | 157 days | 1,510 ft |
| Astoria 4s | May 6 | Oct 3 | 150 days | 1,890 ft |
| Bear Ridge | May 17 | Sep 27 | 132 days | 3,900 ft |
| Belle Fourche | May 10 | Sep 30 | 143 days | 3,020 ft |
| Belle Fourche 22 NNW | May 15 | Sep 24 | 130 days | 3,200 ft |
| Bison | May 10 | Oct 1 | 144 days | 2,780 ft |
| Bonesteel | May 3 | Oct 10 | 159 days | 1,985 ft |
| Bridgewater | Apr 30 | Oct 7 | 161 days | 1,417 ft |
| Britton | May 13 | Sep 26 | 135 days | 1,355 ft |
| Brookings 2 NE | May 6 | Oct 1 | 145 days | 1,639 ft |
| Buffalo 13 ESE | May 20 | Sep 19 | 120 days | 2,883 ft |
| Buffalo Asos | May 10 | Oct 1 | 141 days | 3,004 ft |
| Camp Crook | May 17 | Sep 24 | 128 days | 3,120 ft |
| Canton | May 2 | Oct 2 | 151 days | 1,316 ft |
| Castlewood | May 10 | Sep 27 | 139 days | 1,685 ft |
| Castlewood #2 | May 6 | Oct 1 | 145 days | 1,689 ft |
| Cedar Butte | May 6 | Oct 4 | 151 days | 2,355 ft |
| Centerville 6 SE | May 2 | Oct 1 | 151 days | 1,276 ft |
| Chamberlain 5 S | May 3 | Oct 7 | 156 days | 1,704 ft |
| Chamberlain Muni Airport | May 1 | Oct 7 | 158 days | 1,703 ft |
| Clark | May 5 | Oct 5 | 153 days | 1,804 ft |
| Clark No2 | May 5 | Oct 5 | 152 days | 1,814 ft |
| Clear Lake | May 7 | Oct 1 | 146 days | 1,812 ft |
| Columbia 8 N | May 7 | Sep 29 | 145 days | 1,305 ft |
| Conde | May 6 | Sep 29 | 144 days | 1,330 ft |
| Cottonwood 2 E | May 16 | Sep 26 | 132 days | 2,373 ft |
| Custer | May 18 | Sep 28 | 129 days | 5,480 ft |
| Custer Co Airport | May 23 | Sep 24 | 122 days | 5,545 ft |
| De Smet | May 5 | Oct 4 | 151 days | 1,705 ft |
| Deadwood | May 24 | Sep 25 | 125 days | 4,670 ft |
| Dupree | May 8 | Oct 1 | 144 days | 2,388 ft |
| Dupree 15 SSE | May 6 | Oct 2 | 148 days | 2,100 ft |
| Edgemont | May 23 | Sep 20 | 117 days | 3,432 ft |
| Edgemont 23 NNW | May 18 | Sep 27 | 130 days | 4,402 ft |
| Elm Springs 3 ESE | May 8 | Oct 3 | 146 days | 2,645 ft |
| Eureka | May 12 | Sep 27 | 137 days | 1,871 ft |
| Faith | May 6 | Oct 5 | 151 days | 2,592 ft |
| Faith Muni Airport | May 7 | Oct 3 | 147 days | 2,580 ft |
| Faulkton 1 NW | May 10 | Sep 28 | 139 days | 1,597 ft |
| Flandreau | May 5 | Oct 1 | 148 days | 1,567 ft |
| Forestburg 4 NNE | May 9 | Sep 28 | 140 days | 1,277 ft |
| Fort Meade | May 8 | Oct 3 | 147 days | 3,308 ft |
| Fort Pierre 17 WSW | May 10 | Sep 27 | 138 days | 1,590 ft |
| Gann Valley 3 NNE | May 7 | Oct 1 | 146 days | 1,646 ft |
| Gann Valley 4nw | May 6 | Oct 1 | 148 days | 1,720 ft |
| Gettysburg | May 7 | Oct 2 | 147 days | 2,084 ft |
| Glad Valley 2 W | May 11 | Sep 30 | 140 days | 2,487 ft |
| Gregory | May 6 | Oct 3 | 149 days | 2,160 ft |
| Harrington | May 11 | Oct 1 | 143 days | 2,980 ft |
| Harrold 12 SSW | May 17 | Sep 24 | 129 days | 1,701 ft |
| Hereford 12 SW | May 8 | Oct 3 | 147 days | 2,810 ft |
| Highmore 1 W | May 12 | Oct 1 | 142 days | 1,888 ft |
| Highmore 23 N | May 14 | Sep 29 | 138 days | 1,870 ft |
| Hill City | Jun 1 | Sep 10 | 102 days | 4,946 ft |
| Hoover | May 19 | Sep 21 | 122 days | 2,773 ft |
| Hot Springs | May 16 | Sep 27 | 133 days | 3,560 ft |
| Howard | May 5 | Oct 2 | 149 days | 1,570 ft |
| Huron Regional Airport | May 6 | Oct 2 | 146 days | 1,280 ft |
| Interior 3 NE | May 5 | Oct 7 | 152 days | 2,440 ft |
| Ipswich | May 8 | Sep 29 | 143 days | 1,547 ft |
| Johnson Siding | May 20 | Sep 25 | 126 days | 4,184 ft |
| Kennebec | May 12 | Sep 28 | 137 days | 1,681 ft |
| Kirley 6 N | May 6 | Oct 4 | 148 days | 2,160 ft |
| Kyle 2 E | May 11 | Oct 1 | 139 days | 2,958 ft |
| Ladner 9sw | May 13 | Sep 27 | 135 days | 3,000 ft |
| Lake Sharpe Prj | May 6 | Oct 5 | 152 days | 1,461 ft |
| Lead | May 18 | Sep 29 | 133 days | 5,112 ft |
| Lemmon | May 10 | Sep 30 | 142 days | 2,567 ft |
| Leola | May 9 | Sep 28 | 141 days | 1,580 ft |
| Lodgepole 5sw | May 30 | Sep 11 | 103 days | 2,570 ft |
| Longvalley | May 9 | Oct 1 | 143 days | 2,470 ft |
| Ludlow 3 SSE | May 16 | Sep 26 | 131 days | 2,990 ft |
| Madison 2se | May 5 | Sep 30 | 148 days | 1,643 ft |
| Manderson 3 NE | May 9 | Oct 4 | 147 days | 3,095 ft |
| Martin | May 13 | Oct 2 | 141 days | 3,330 ft |
| Martin 8 E | May 14 | Oct 1 | 139 days | 3,036 ft |
| Maurine 12sw | May 13 | Sep 28 | 136 days | 2,629 ft |
| Mc Intosh 6 SE | May 9 | Sep 30 | 143 days | 2,179 ft |
| Mc Laughlin | May 12 | Sep 28 | 137 days | 2,001 ft |
| Mellette 4 W | May 11 | Sep 27 | 137 days | 1,296 ft |
| Menno | May 1 | Oct 4 | 156 days | 1,332 ft |
| Midland | May 12 | Sep 28 | 138 days | 1,870 ft |
| Milbank | May 5 | Oct 2 | 150 days | 1,142 ft |
| Milbank 4 NW | May 2 | Oct 4 | 153 days | 1,145 ft |
| Milesville 5 NE | May 8 | Oct 2 | 147 days | 2,237 ft |
| Miller | May 3 | Oct 3 | 152 days | 1,576 ft |
| Mission | May 9 | Oct 1 | 146 days | 2,587 ft |
| Mission 14 S | May 11 | Oct 2 | 145 days | 2,810 ft |
| Mission Ridge 5nw | May 6 | Oct 7 | 152 days | 1,982 ft |
| Mitchell | Apr 27 | Oct 11 | 167 days | 1,287 ft |
| Mitchell 2 N | May 2 | Oct 6 | 156 days | 1,250 ft |
| Mitchell Muni Airport | Apr 30 | Oct 5 | 159 days | 1,303 ft |
| Mobridge 2nnw | May 3 | Oct 8 | 157 days | 1,693 ft |
| Mobridge Muni Airport | May 5 | Oct 4 | 150 days | 1,715 ft |
| Montrose 8n | May 3 | Oct 4 | 153 days | 1,718 ft |
| Mount Rushmore Nmem | May 15 | Oct 1 | 138 days | 5,311 ft |
| Murdo | May 3 | Oct 9 | 158 days | 2,316 ft |
| Newell | May 8 | Oct 1 | 144 days | 2,860 ft |
| Oahe Dam | May 6 | Oct 5 | 152 days | 1,663 ft |
| Oelrichs | May 15 | Sep 30 | 137 days | 3,348 ft |
| Oglala 1s | May 7 | Oct 4 | 149 days | 2,995 ft |
| Onida 4 NW | May 8 | Oct 2 | 147 days | 1,851 ft |
| Oral | May 15 | Sep 27 | 133 days | 2,960 ft |
| Pactola Dam | May 28 | Sep 18 | 112 days | 4,720 ft |
| Philip Airport | May 11 | Sep 30 | 141 days | 2,206 ft |
| Pickstown | Apr 30 | Oct 13 | 165 days | 1,490 ft |
| Pickstown 4ssw | Apr 27 | Oct 13 | 168 days | 1,707 ft |
| Pierre 24 S | May 6 | Oct 7 | 154 days | 2,124 ft |
| Pierre Regional Airport | May 6 | Oct 3 | 148 days | 1,742 ft |
| Pine Ridge Airport | May 16 | Sep 27 | 132 days | 3,278 ft |
| Plainview 6 SSW | May 15 | Sep 27 | 134 days | 2,377 ft |
| Pollock | May 8 | Sep 30 | 143 days | 1,639 ft |
| Porcupine 11 N | May 17 | Sep 25 | 130 days | 2,820 ft |
| Presho 7 NW | May 12 | Sep 29 | 140 days | 1,810 ft |
| Ralph 1 N | May 18 | Sep 23 | 126 days | 2,790 ft |
| Rapid City 4nw | May 10 | Oct 5 | 147 days | 3,479 ft |
| Rapid City Regional Airport | May 12 | Oct 1 | 139 days | 3,160 ft |
| Rapid City WFO | May 3 | Oct 8 | 157 days | 3,379 ft |
| Rauville 2 W | May 7 | Sep 28 | 143 days | 1,737 ft |
| Red Owl | May 16 | Sep 26 | 131 days | 2,773 ft |
| Redfield | May 8 | Oct 1 | 145 days | 1,309 ft |
| Redig 11 NE | May 15 | Sep 24 | 131 days | 3,070 ft |
| Rochford 2 WNW | any month | any month | 63 days | 5,450 ft |
| Roscoe | May 7 | Oct 3 | 148 days | 1,835 ft |
| Roy Lake | May 2 | Oct 9 | 160 days | 1,810 ft |
| Salem 5ne | May 7 | Sep 29 | 144 days | 1,594 ft |
| Selby | May 8 | Oct 1 | 145 days | 1,908 ft |
| Shadehill Rsvr | May 16 | Sep 24 | 131 days | 2,450 ft |
| Sioux Falls | May 1 | Oct 6 | 157 days | 1,430 ft |
| Sioux Falls 14 NNE | May 1 | Oct 4 | 155 days | 1,594 ft |
| Sioux Falls WFO Airport | Apr 26 | Oct 13 | 169 days | 1,430 ft |
| Sisseton | May 4 | Oct 3 | 151 days | 1,209 ft |
| Sisseton Muni Airport | May 3 | Sep 30 | 149 days | 1,161 ft |
| Spearfish | May 12 | Oct 2 | 143 days | 3,633 ft |
| Stephan 2 NW | May 10 | Sep 29 | 140 days | 1,805 ft |
| Summit 1 W | May 14 | Sep 28 | 136 days | 1,955 ft |
| Timber Lake | May 10 | Sep 30 | 141 days | 2,173 ft |
| Turton | May 7 | Oct 3 | 149 days | 1,335 ft |
| Tyndall | May 1 | Oct 7 | 158 days | 1,420 ft |
| Vermillion 2 SE | May 3 | Oct 3 | 153 days | 1,137 ft |
| Victor 4 N | May 4 | Oct 3 | 152 days | 1,095 ft |
| Wagner | Apr 29 | Oct 9 | 164 days | 1,430 ft |
| Wasta | May 10 | Oct 1 | 141 days | 2,328 ft |
| Watertown 2 S | May 3 | Oct 4 | 153 days | 1,772 ft |
| Watertown Regional Airport | May 7 | Sep 30 | 145 days | 1,748 ft |
| Waubay National Wild Life | May 1 | Oct 12 | 164 days | 1,827 ft |
| Webster | May 4 | Oct 6 | 156 days | 1,861 ft |
| Wentworth 2.5 WNW | May 2 | Oct 5 | 156 days | 1,722 ft |
| Wessington Springs | May 2 | Oct 8 | 157 days | 1,715 ft |
| White Lake | May 3 | Oct 5 | 153 days | 1,629 ft |
| Wilmot | May 5 | Oct 1 | 149 days | 1,201 ft |
| Wind Cave | May 15 | Sep 29 | 133 days | 4,155 ft |
| Winfred 2s | May 6 | Oct 3 | 151 days | 1,705 ft |
| Winner | May 1 | Oct 9 | 159 days | 2,016 ft |
| Winner Wiley Field | May 1 | Oct 10 | 162 days | 2,032 ft |
| Wood | May 10 | Oct 1 | 143 days | 2,180 ft |
| Yankton 2 E | Apr 27 | Oct 11 | 164 days | 1,180 ft |
| Zeona 10 SSW | May 11 | Sep 28 | 137 days | 2,730 ft |
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.