South Dakota Frost Dates
The median last spring freeze and first fall freeze (32°F) at 166 NOAA stations in South Dakota, 1991-2020, with the growing season between them.
Every station
A median date has an even chance of a later freeze in spring or an earlier one in fall. Each town page gives the dates at 36, 32 and 28°F and every probability from 10 to 90 percent.
| Station | Elevation | Last freeze | First freeze | Season, days | Town page |
|---|---|---|---|---|---|
| Aberdeen | 1,302 ft | May 9 | September 26 | 140 | Aberdeen |
| Aberdeen 3 E | 1,301 ft | May 8 | September 29 | 144 | Aberdeen |
| Aberdeen 35 Wnw | 1,957 ft | May 10 | September 30 | 143 | Leola |
| Academy 2NE | 1,681 ft | April 30 | October 8 | 161 | Platte |
| Alexandria | 1,365 ft | May 8 | September 29 | 144 | Alexandria |
| Andover #2 | 1,478 ft | May 6 | October 4 | 151 | Groton |
| Antelope RS | 2,820 ft | May 19 | September 19 | 123 | Buffalo |
| Ardmore 1 Nw | 3,540 ft | May 16 | September 23 | 130 | Edgemont |
| Arlington 1 W | 1,824 ft | May 3 | October 2 | 152 | Arlington |
| Armour | 1,510 ft | May 3 | October 6 | 156 | Armour |
| Astoria 4S | 1,890 ft | May 6 | October 3 | 150 | |
| Bear Ridge | 3,900 ft | May 17 | September 27 | 133 | North Spearfish |
| Belle Fourche | 3,020 ft | May 10 | September 30 | 143 | Belle Fourche |
| Belle Fourche 22 Nnw | 3,200 ft | May 15 | September 24 | 132 | Belle Fourche |
| Bison | 2,780 ft | May 10 | October 1 | 144 | Bison |
| Bonesteel | 1,985 ft | May 3 | October 10 | 160 | |
| Bridgewater | 1,417 ft | April 30 | October 7 | 160 | Canistota |
| Britton | 1,355 ft | May 13 | September 26 | 136 | Britton |
| Brookings 2 Ne | 1,639 ft | May 6 | October 1 | 148 | Brookings |
| Buffalo 13 Ese | 2,883 ft | May 20 | September 19 | 122 | Buffalo |
| Buffalo Asos | 3,004 ft | May 10 | October 1 | 144 | Buffalo |
| Camp Crook | 3,120 ft | May 17 | September 24 | 130 | Buffalo |
| Canton | 1,316 ft | May 2 | October 2 | 153 | Canton |
| Castlewood | 1,685 ft | May 10 | September 27 | 140 | Castlewood |
| Castlewood #2 | 1,689 ft | May 6 | October 1 | 148 | Castlewood |
| Cedar Butte | 2,355 ft | May 6 | October 4 | 151 | White River |
| Centerville 6 Se | 1,276 ft | May 2 | October 1 | 152 | Centerville |
| Chamberlain 5 S | 1,704 ft | May 3 | October 7 | 157 | Chamberlain |
| Chamberlain Muni AP | 1,703 ft | May 1 | October 7 | 159 | Chamberlain |
| Clark | 1,804 ft | May 5 | October 5 | 153 | Clark |
| Clark No2 | 1,814 ft | May 5 | October 5 | 153 | Clark |
| Clear Lake | 1,812 ft | May 7 | October 1 | 147 | Clear Lake |
| Columbia 8 N | 1,305 ft | May 7 | September 29 | 145 | Aberdeen |
| Conde | 1,330 ft | May 6 | September 29 | 146 | Groton |
| Cottonwood 2 E | 2,373 ft | May 16 | September 26 | 133 | Philip |
| Custer | 5,480 ft | May 18 | September 28 | 133 | Custer |
| Custer CO AP | 5,545 ft | May 23 | September 24 | 124 | Custer |
| De Smet | 1,705 ft | May 5 | October 4 | 152 | De Smet |
| Deadwood | 4,670 ft | May 24 | September 25 | 124 | Deadwood |
| Dupree | 2,388 ft | May 8 | October 1 | 146 | Dupree |
| Dupree 15 Sse | 2,100 ft | May 6 | October 2 | 149 | Dupree |
| Edgemont | 3,432 ft | May 23 | September 20 | 120 | Edgemont |
| Edgemont 23 Nnw | 4,402 ft | May 18 | September 27 | 132 | Custer |
| Elm Springs 3 Ese | 2,645 ft | May 8 | October 3 | 148 | New Underwood |
| Eureka | 1,871 ft | May 12 | September 27 | 138 | Eureka |
| Faith | 2,592 ft | May 6 | October 5 | 152 | Dupree |
| Faith Muni AP | 2,580 ft | May 7 | October 3 | 149 | Dupree |
| Faulkton 1 Nw | 1,597 ft | May 10 | September 28 | 141 | Faulkton |
| Flandreau | 1,567 ft | May 5 | October 1 | 149 | Flandreau |
| Forestburg 4 Nne | 1,277 ft | May 9 | September 28 | 142 | Woonsocket |
| Ft Meade | 3,308 ft | May 8 | October 3 | 148 | Sturgis |
| Ft Pierre 17 Wsw | 1,590 ft | May 10 | September 27 | 140 | Fort Pierre |
| Gann Valley 3 Nne | 1,646 ft | May 7 | October 1 | 147 | Wessington Springs |
| Gann Valley 4NW | 1,720 ft | May 6 | October 1 | 148 | Fort Thompson |
| Gettysburg | 2,084 ft | May 7 | October 2 | 148 | Gettysburg |
| Glad Valley 2 W | 2,487 ft | May 11 | September 30 | 142 | Dupree |
| Gregory | 2,160 ft | May 6 | October 3 | 150 | Gregory |
| Harrington | 2,980 ft | May 11 | October 1 | 143 | Parmelee |
| Harrold 12 Ssw | 1,701 ft | May 17 | September 24 | 130 | Highmore |
| Hereford 12 Sw | 2,810 ft | May 8 | October 3 | 148 | Ellsworth Air Force Base |
| Highmore 1 W | 1,888 ft | May 12 | October 1 | 142 | Highmore |
| Highmore 23 N | 1,870 ft | May 14 | September 29 | 138 | Faulkton |
| Hill City | 4,946 ft | June 1 | September 10 | 101 | Hill City |
| Hoover | 2,773 ft | May 19 | September 21 | 125 | Newell |
| Hot Springs | 3,560 ft | May 16 | September 27 | 134 | Hot Springs |
| Howard | 1,570 ft | May 5 | October 2 | 150 | Howard |
| Huron Rgnl AP | 1,280 ft | May 6 | October 2 | 149 | Huron |
| Interior 3 Ne | 2,440 ft | May 5 | October 7 | 155 | Wanblee |
| Ipswich | 1,547 ft | May 8 | September 29 | 144 | Ipswich |
| Johnson Siding | 4,184 ft | May 20 | September 25 | 128 | Johnson Siding |
| Kennebec | 1,681 ft | May 12 | September 28 | 139 | Kennebec |
| Kirley 6 N | 2,160 ft | May 6 | October 4 | 151 | Eagle Butte |
| Kyle 2 E | 2,958 ft | May 11 | October 1 | 143 | Kyle |
| Ladner 9SW | 3,000 ft | May 13 | September 27 | 137 | Buffalo |
| Lake Sharpe Prj | 1,461 ft | May 6 | October 5 | 152 | Fort Thompson |
| Lead | 5,112 ft | May 18 | September 29 | 134 | Lead |
| Lemmon | 2,567 ft | May 10 | September 30 | 143 | Lemmon |
| Leola | 1,580 ft | May 9 | September 28 | 142 | Leola |
| Lodgepole 5SW | 2,570 ft | May 30 | September 11 | 104 | |
| Longvalley | 2,470 ft | May 9 | October 1 | 145 | Wanblee |
| Ludlow 3 Sse | 2,990 ft | May 16 | September 26 | 133 | Buffalo |
| Madison 2SE | 1,643 ft | May 5 | September 30 | 148 | Madison |
| Manderson 3 Ne | 3,095 ft | May 9 | October 4 | 148 | Manderson-White Horse Creek |
| Martin | 3,330 ft | May 13 | October 2 | 142 | Martin |
| Martin 8 E | 3,036 ft | May 14 | October 1 | 140 | Martin |
| Maurine 12SW | 2,629 ft | May 13 | September 28 | 138 | Newell |
| Mc Intosh 6 Se | 2,179 ft | May 9 | September 30 | 144 | McIntosh |
| Mc Laughlin | 2,001 ft | May 12 | September 28 | 139 | McLaughlin |
| Mellette 4 W | 1,296 ft | May 11 | September 27 | 139 | Redfield |
| Menno | 1,332 ft | May 1 | October 4 | 156 | Menno |
| Midland | 1,870 ft | May 12 | September 28 | 139 | Kadoka |
| Milbank | 1,142 ft | May 5 | October 2 | 150 | Milbank |
| Milbank 4 Nw | 1,145 ft | May 2 | October 4 | 155 | Milbank |
| Milesville 5 Ne | 2,237 ft | May 8 | October 2 | 147 | Philip |
| Miller | 1,576 ft | May 3 | October 3 | 153 | Miller |
| Mission | 2,587 ft | May 9 | October 1 | 145 | Mission |
| Mission 14 S | 2,810 ft | May 11 | October 2 | 144 | Antelope |
| Mission Ridge 5NW | 1,982 ft | May 6 | October 7 | 154 | Eagle Butte |
| Mitchell | 1,287 ft | April 27 | October 11 | 167 | Mitchell |
| Mitchell 2 N | 1,250 ft | May 2 | October 6 | 157 | Mitchell |
| Mitchell Muni AP | 1,303 ft | April 30 | October 5 | 158 | Mitchell |
| Mobridge 2NNW | 1,693 ft | May 3 | October 8 | 158 | Mobridge |
| Mobridge Muni AP | 1,715 ft | May 5 | October 4 | 152 | Mobridge |
| Montrose 8N | 1,718 ft | May 3 | October 4 | 154 | Salem |
| Mt Rushmore Nmem | 5,311 ft | May 15 | October 1 | 139 | Hill City |
| Murdo | 2,316 ft | May 3 | October 9 | 159 | Murdo |
| Newell | 2,860 ft | May 8 | October 1 | 146 | Newell |
| Oahe Dam | 1,663 ft | May 6 | October 5 | 152 | Pierre |
| Oelrichs | 3,348 ft | May 15 | September 30 | 138 | Hot Springs |
| Oglala 1S | 2,995 ft | May 7 | October 4 | 150 | Oglala |
| Onida 4 Nw | 1,851 ft | May 8 | October 2 | 147 | Onida |
| Oral | 2,960 ft | May 15 | September 27 | 135 | Hot Springs |
| Pactola Dam | 4,720 ft | May 28 | September 18 | 113 | Johnson Siding |
| Philip AP | 2,206 ft | May 11 | September 30 | 142 | Philip |
| Pickstown | 1,490 ft | April 30 | October 13 | 166 | Lake Andes |
| Pickstown 4SSW | 1,707 ft | April 27 | October 13 | 169 | Lake Andes |
| Pierre 24 S | 2,124 ft | May 6 | October 7 | 154 | Presho |
| Pierre Rgnl AP | 1,742 ft | May 6 | October 3 | 150 | Pierre |
| Pine Ridge AP | 3,278 ft | May 16 | September 27 | 134 | Pine Ridge |
| Plainview 6 Ssw | 2,377 ft | May 15 | September 27 | 135 | Wall |
| Pollock | 1,639 ft | May 8 | September 30 | 145 | Mound City |
| Porcupine 11 N | 2,820 ft | May 17 | September 25 | 131 | Kyle |
| Presho 7 Nw | 1,810 ft | May 12 | September 29 | 140 | Presho |
| Ralph 1 N | 2,790 ft | May 18 | September 23 | 128 | |
| Rapid City 4NW | 3,479 ft | May 10 | October 5 | 148 | Blackhawk |
| Rapid City Rgnl AP | 3,160 ft | May 12 | October 1 | 142 | Green Valley |
| Rapid City WFO | 3,379 ft | May 3 | October 8 | 158 | Rapid City |
| Rauville 2 W | 1,737 ft | May 7 | September 28 | 144 | Watertown |
| Red Owl | 2,773 ft | May 16 | September 26 | 133 | Newell |
| Redfield | 1,309 ft | May 8 | October 1 | 146 | Redfield |
| Redig 11 Ne | 3,070 ft | May 15 | September 24 | 132 | Buffalo |
| Roscoe | 1,835 ft | May 7 | October 3 | 149 | Ipswich |
| Roy Lake | 1,810 ft | May 2 | October 9 | 160 | Veblen |
| Salem 5NE | 1,594 ft | May 7 | September 29 | 145 | Salem |
| Selby | 1,908 ft | May 8 | October 1 | 146 | Selby |
| Shadehill Rsvr | 2,450 ft | May 16 | September 24 | 131 | Bison |
| Sioux Falls | 1,430 ft | May 1 | October 6 | 158 | Meadow View Addition |
| Sioux Falls 14 Nne | 1,594 ft | May 1 | October 4 | 156 | Garretson |
| Sioux Falls WFO AP | 1,430 ft | April 26 | October 13 | 170 | Meadow View Addition |
| Sisseton | 1,209 ft | May 4 | October 3 | 152 | Sisseton |
| Sisseton Muni AP | 1,161 ft | May 3 | September 30 | 150 | Sisseton |
| Spearfish | 3,633 ft | May 12 | October 2 | 143 | Spearfish |
| Stephan 2 Nw | 1,805 ft | May 10 | September 29 | 142 | Fort Thompson |
| Summit 1 W | 1,955 ft | May 14 | September 28 | 137 | Waubay |
| Timber Lake | 2,173 ft | May 10 | September 30 | 143 | Timber Lake |
| Turton | 1,335 ft | May 7 | October 3 | 149 | Clark |
| Tyndall | 1,420 ft | May 1 | October 7 | 159 | Tyndall |
| Vermillion 2 Se | 1,137 ft | May 3 | October 3 | 153 | Vermillion |
| Victor 4 N | 1,095 ft | May 4 | October 3 | 152 | |
| Wagner | 1,430 ft | April 29 | October 9 | 163 | Wagner |
| Wasta | 2,328 ft | May 10 | October 1 | 144 | Wall |
| Watertown 2 S | 1,772 ft | May 3 | October 4 | 154 | Watertown |
| Watertown Rgnl AP | 1,748 ft | May 7 | September 30 | 146 | Watertown |
| Waubay Natl Wild Life | 1,827 ft | May 1 | October 12 | 164 | Waubay |
| Webster | 1,861 ft | May 4 | October 6 | 155 | Webster |
| Wentworth 2.5 Wnw | 1,722 ft | May 2 | October 5 | 156 | Madison |
| Wessington Springs | 1,715 ft | May 2 | October 8 | 159 | Wessington Springs |
| White Lake | 1,629 ft | May 3 | October 5 | 155 | Plankinton |
| Wilmot | 1,201 ft | May 5 | October 1 | 149 | Wilmot |
| Wind Cave | 4,155 ft | May 15 | September 29 | 137 | Hot Springs |
| Winfred 2S | 1,705 ft | May 6 | October 3 | 150 | Howard |
| Winner | 2,016 ft | May 1 | October 9 | 161 | Winner |
| Winner Wiley Fld | 2,032 ft | May 1 | October 10 | 162 | Winner |
| Wood | 2,180 ft | May 10 | October 1 | 144 | White River |
| Yankton 2 E | 1,180 ft | April 27 | October 11 | 167 | Yankton |
| Zeona 10 Ssw | 2,730 ft | May 11 | September 28 | 140 | Newell |
Sources
NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.