Minnesota Frost Dates
The median last spring freeze and first fall freeze (32°F) at 179 NOAA stations in Minnesota, 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 |
|---|---|---|---|---|---|
| Ada | 907 ft | May 11 | September 27 | 139 | Ada |
| Agassiz Refuge | 1,142 ft | May 6 | October 3 | 150 | Thief River Falls |
| Aitkin 2E | 1,215 ft | May 16 | September 28 | 135 | Aitkin |
| Albert Lea 3SE | 1,230 ft | April 27 | October 9 | 165 | Glenville |
| Alexandria Muni AP | 1,416 ft | May 2 | October 8 | 159 | Alexandria |
| Amboy | 1,030 ft | April 30 | October 7 | 160 | Amboy |
| Andover 1N | 899 ft | May 5 | October 2 | 150 | Andover |
| Argyle | 847 ft | May 15 | September 26 | 134 | Argyle |
| Artichoke Lake 1 E | 1,098 ft | May 1 | October 8 | 160 | Appleton |
| Austin Waste Wtp Facility | 1,199 ft | April 30 | October 5 | 158 | Austin |
| Babbitt | 1,481 ft | May 28 | September 14 | 109 | Babbitt |
| Baudette | 1,094 ft | May 14 | September 26 | 135 | Baudette |
| Baudette Intl AP | 1,082 ft | May 15 | September 26 | 134 | Baudette |
| Benson | 1,030 ft | May 4 | October 3 | 152 | Benson |
| Big Falls | 1,220 ft | May 24 | September 20 | 119 | Littlefork |
| Blackduck | 1,340 ft | May 24 | September 17 | 116 | Blackduck |
| Brainerd | 1,180 ft | May 8 | September 29 | 144 | Brainerd |
| Brainerd Crow Wing CO AP | 1,221 ft | May 13 | September 27 | 137 | Brainerd |
| Breckenridge 3E | 971 ft | May 4 | October 3 | 152 | Breckenridge |
| Browns Valley | 978 ft | May 9 | September 28 | 142 | Browns Valley |
| Brownton Wwtp | 1,040 ft | April 30 | October 4 | 157 | Brownton |
| Bruno 7ENE | 1,253 ft | May 18 | September 26 | 131 | Moose Lake |
| Buffalo 2NE | 992 ft | April 30 | October 9 | 162 | Buffalo |
| Byron 4NORTH | 1,041 ft | May 12 | September 28 | 139 | Byron |
| Caledonia | 1,166 ft | April 29 | October 10 | 164 | Caledonia |
| Cambridge | 965 ft | May 2 | October 4 | 155 | Cambridge |
| Camp Norris Dnr | 1,289 ft | May 25 | September 22 | 120 | Warroad |
| Canby | 1,210 ft | May 2 | October 5 | 156 | Canby |
| Cass Lake | 1,296 ft | May 17 | September 26 | 132 | Cass Lake |
| Cedar | 907 ft | May 1 | October 7 | 159 | Oak Grove |
| Celina 2E | 1,285 ft | June 1 | September 15 | 106 | Cook |
| Chanhassen Wsfo | 946 ft | April 30 | October 9 | 162 | Chanhassen |
| Chaska 2NW | 923 ft | May 5 | October 5 | 153 | Chaska |
| Cloquet | 1,265 ft | May 26 | September 23 | 120 | Cloquet |
| Collegeville St John's | 1,210 ft | May 3 | October 7 | 157 | Collegeville |
| Cook 8NE | 1,355 ft | May 12 | October 1 | 142 | Cook |
| Cotton | 1,323 ft | May 27 | September 20 | 116 | Eveleth |
| Crookston Nw Exp Stn | 891 ft | May 11 | September 27 | 139 | Crookston |
| Dassel 3SE | 1,065 ft | April 30 | October 10 | 163 | Dassel |
| Deep Portage | 1,471 ft | May 5 | October 5 | 153 | Pine River |
| Delano | 975 ft | April 30 | October 8 | 161 | Delano |
| Detroit Lakes 1 Nne | 1,355 ft | May 15 | September 24 | 132 | Detroit Lakes |
| Detroit Lakes 12E | 1,542 ft | May 4 | October 3 | 152 | Frazee |
| Duluth | 1,428 ft | May 13 | October 1 | 141 | Hermantown |
| Duluth Harbor Stn | 610 ft | May 14 | October 12 | 151 | Duluth |
| Duluth NWS | 1,433 ft | May 18 | October 1 | 136 | Hermantown |
| Elk Rvr | 880 ft | May 4 | October 5 | 154 | Elk River |
| Ely | 1,382 ft | May 24 | September 23 | 122 | Ely |
| Ely | 1,475 ft | May 14 | September 29 | 138 | Ely |
| Ely 25E | 1,444 ft | May 21 | September 25 | 127 | Ely |
| Eveleth Wwtp | 1,445 ft | May 12 | October 1 | 142 | Eveleth |
| Fairmont | 1,187 ft | April 25 | October 14 | 172 | Fairmont |
| Faribault | 970 ft | May 5 | October 5 | 153 | Faribault |
| Farmington 3 Nw | 980 ft | April 27 | October 10 | 166 | Farmington |
| Fergus Falls | 1,250 ft | May 4 | October 5 | 154 | Fergus Falls |
| Floodwood 3 Ne | 1,260 ft | May 29 | September 18 | 112 | Floodwood |
| Forest Lake 5NE | 905 ft | May 3 | October 5 | 155 | Chisago City |
| Fosston 1 E | 1,300 ft | May 15 | September 26 | 134 | Fosston |
| Gaylord | 1,020 ft | April 24 | October 15 | 174 | Gaylord |
| Georgetown 1 E | 885 ft | May 9 | October 1 | 145 | |
| Glenwood 2WNW | 1,198 ft | May 11 | September 27 | 139 | Glenwood |
| Goodridge 12 Nnw | 1,150 ft | May 20 | September 17 | 120 | Thief River Falls |
| Grand Marais | 612 ft | May 20 | October 5 | 138 | Grand Marais |
| Grand Marais | 610 ft | May 22 | October 9 | 140 | Grand Marais |
| Grand Meadow | 1,350 ft | May 6 | October 1 | 148 | Grand Meadow |
| Grand Portage | 730 ft | May 24 | September 29 | 128 | Grand Marais |
| Grand Rpds Forest Lab | 1,310 ft | May 17 | September 24 | 130 | La Prairie |
| Granite Falls | 930 ft | May 4 | October 1 | 150 | Granite Falls |
| Gull Lake Dam | 1,215 ft | May 2 | October 6 | 157 | East Gull Lake |
| Gunflint Lake 10 Nw | 1,455 ft | May 23 | September 26 | 126 | Grand Marais |
| Hallock | 815 ft | May 8 | September 30 | 145 | Hallock |
| Hastings Dam 2 | 680 ft | April 23 | October 19 | 179 | Hastings |
| Hibbing Chisholm Hibbing AP | 1,352 ft | June 5 | September 8 | 95 | Hibbing |
| Hinckley | 1,035 ft | May 16 | September 24 | 131 | Hinckley |
| Hutchinson 1 N | 1,095 ft | April 28 | October 8 | 163 | Hutchinson |
| Intl Falls Intl AP | 1,183 ft | May 29 | September 13 | 107 | International Falls |
| Isabella 14W | 1,740 ft | May 31 | September 15 | 107 | Babbitt |
| Island Lake 4E | 1,410 ft | May 21 | September 27 | 129 | Arnold |
| Isle 12N | 1,285 ft | May 10 | October 3 | 146 | Isle |
| Itasca Univ Of Minn | 1,490 ft | May 18 | September 27 | 132 | Naytahwaush |
| Jordan 1SSW | 900 ft | May 2 | October 5 | 156 | Jordan |
| Kabetogama | 1,200 ft | May 28 | September 16 | 111 | Ranier |
| Kimball 3N | 1,160 ft | May 2 | October 5 | 156 | Kimball |
| La Crescent Dam 7 | 647 ft | April 15 | October 28 | 196 | |
| Lake Wilson | 1,653 ft | May 7 | September 29 | 145 | Slayton |
| Lakefield 2NE | 1,530 ft | May 2 | October 2 | 153 | Lakefield |
| Lamberton Sw Rsch & Outreach C | 1,140 ft | May 3 | October 2 | 152 | Lamberton |
| Leech Lake | 1,302 ft | May 8 | October 1 | 146 | Walker |
| Litchfield | 1,120 ft | May 6 | October 2 | 149 | Litchfield |
| Little Falls 2NNE | 1,120 ft | May 4 | October 5 | 154 | Little Falls |
| Littlefork 10 Sw | 1,200 ft | May 23 | September 21 | 121 | Littlefork |
| Long Prairie | 1,340 ft | May 13 | September 27 | 137 | Long Prairie |
| Lower St Anthony Falls | 754 ft | April 23 | October 16 | 176 | Minneapolis |
| Lutsen 3NNE | 1,300 ft | May 26 | September 27 | 124 | Grand Marais |
| Mabel | 1,112 ft | May 10 | September 28 | 141 | Mabel |
| Madison Wwtp | 1,075 ft | May 3 | October 2 | 152 | Madison |
| Mahnomen | 1,212 ft | May 7 | September 28 | 144 | Mahnomen |
| Mankato | 850 ft | April 30 | October 9 | 162 | Mankato |
| Marcell 5NE | 1,387 ft | May 14 | October 2 | 141 | Deer River |
| Marshall | 1,149 ft | May 5 | October 3 | 151 | Marshall |
| Melrose | 1,195 ft | May 4 | October 1 | 150 | Melrose |
| Milaca | 1,064 ft | May 8 | October 1 | 146 | Milaca |
| Milan 1NW | 1,020 ft | May 3 | October 2 | 152 | Appleton |
| Minneapolis/st Paul AP | 872 ft | April 23 | October 18 | 178 | Richfield |
| Minnesota City Dam 5 | 670 ft | April 23 | October 16 | 176 | Rollingstone |
| Montevideo 1SW | 990 ft | May 4 | October 1 | 150 | Montevideo |
| Moorhead | 904 ft | May 5 | October 3 | 151 | Moorhead |
| Moose Lake 1 Sse | 1,110 ft | May 12 | October 2 | 143 | Moose Lake |
| Mora | 1,018 ft | May 9 | September 30 | 144 | Mora |
| Morris W Cntrl Rsch & Outreach | 1,140 ft | May 4 | October 1 | 150 | Morris |
| Mpls Crystal AP | 861 ft | April 30 | October 8 | 161 | Brooklyn Center |
| Mpls Flying Cloud AP | 907 ft | April 23 | October 14 | 174 | Eden Prairie |
| New Hope | 910 ft | April 29 | October 12 | 166 | Golden Valley |
| New London | 1,250 ft | May 4 | October 4 | 153 | New London |
| New Ulm 2 Se | 890 ft | April 29 | October 7 | 161 | New Ulm |
| New Ulm 3SE | 925 ft | May 2 | October 7 | 158 | New Ulm |
| New York Mills | 1,406 ft | May 10 | September 29 | 142 | New York Mills |
| Northome 3S | 1,415 ft | May 16 | September 26 | 133 | Blackduck |
| Olivia 3E | 1,100 ft | May 6 | October 1 | 148 | Bird Island |
| Orr 3E | 1,315 ft | June 2 | September 15 | 105 | Cook |
| Ottertail | 1,349 ft | May 5 | October 5 | 153 | Ottertail |
| Owatonna | 1,140 ft | May 5 | October 6 | 154 | Owatonna |
| Park Rapids Muni AP | 1,434 ft | May 14 | September 25 | 134 | Park Rapids |
| Pine Rvr Dam | 1,250 ft | May 6 | October 7 | 154 | Crosslake |
| Pipestone | 1,705 ft | May 4 | October 2 | 151 | Pipestone |
| Pokegama Dam | 1,280 ft | May 16 | October 1 | 138 | Cohasset |
| Preston | 930 ft | May 14 | September 28 | 137 | Preston |
| Red Lake Falls | 1,038 ft | May 9 | September 30 | 144 | Red Lake Falls |
| Red Lake Indian Agcy | 1,216 ft | May 12 | October 4 | 145 | Red Lake |
| Red Wing Dam 3 | 677 ft | April 23 | October 14 | 174 | Red Wing |
| Redwood Falls | 1,020 ft | April 30 | October 10 | 163 | Redwood Falls |
| Redwood Falls Muni AP | 1,021 ft | April 30 | October 4 | 157 | Redwood Falls |
| Rice | 1,060 ft | May 10 | September 29 | 142 | Rice |
| Rochester Intl AP | 1,304 ft | April 30 | October 6 | 159 | Stewartville |
| Rosemount Rsch & Outreach Ctr | 945 ft | May 2 | October 5 | 156 | Rosemount |
| Rothsay | 1,204 ft | May 5 | October 3 | 151 | Pelican Rapids |
| Rushford | 770 ft | May 8 | October 3 | 148 | Rushford |
| Sandstone 6 W | 1,130 ft | May 13 | September 29 | 139 | Sandstone |
| Sandy Lake Dam Libby | 1,234 ft | May 7 | October 3 | 149 | Hill City |
| Santiago 3 E | 1,010 ft | May 7 | September 28 | 144 | Princeton |
| Sherburn 3WSW | 1,320 ft | April 28 | October 8 | 163 | Sherburn |
| Springfield 1 Nw | 1,066 ft | May 4 | October 1 | 150 | Springfield |
| St Cloud Rgnl AP | 1,018 ft | May 7 | September 30 | 146 | Saint Cloud |
| St James Wwtp | 1,070 ft | April 30 | October 7 | 160 | Saint James |
| St Paul | 900 ft | April 26 | October 12 | 169 | Maplewood |
| St Paul 3SW | 925 ft | April 25 | October 12 | 170 | Lilydale |
| St Paul Downtown AP | 700 ft | April 24 | October 16 | 175 | Saint Paul |
| St Peter | 795 ft | May 2 | October 4 | 155 | Saint Peter |
| Stillwater 1 Se | 710 ft | April 22 | October 19 | 180 | Oak Park Heights |
| Stillwater 2SW | 898 ft | April 30 | October 11 | 164 | Stillwater |
| Tamarac Wildlife Re | 1,508 ft | May 5 | October 3 | 151 | White Earth |
| Theilman 1SSW | 753 ft | May 7 | October 2 | 148 | Plainview |
| Thief Rvr Falls 2 | 1,128 ft | May 14 | September 28 | 137 | Thief River Falls |
| Thorhult | 1,237 ft | May 24 | September 20 | 119 | Ponemah |
| Tracy | 1,403 ft | May 2 | October 5 | 156 | Tracy |
| Two Harbors | 625 ft | May 12 | October 6 | 147 | Two Harbors |
| Two Harbors 7NW | 1,355 ft | May 27 | September 23 | 119 | Two Harbors |
| U Of Mn St Paul | 970 ft | April 28 | October 8 | 163 | Falcon Heights |
| Vadnais Lake | 890 ft | April 23 | October 20 | 180 | Vadnais Heights |
| Wadena 3 S | 1,372 ft | May 10 | September 30 | 143 | Wadena |
| Walker | 1,430 ft | May 4 | October 7 | 156 | Walker |
| Warren Wsd | 855 ft | May 5 | October 2 | 150 | Warren |
| Warroad | 1,073 ft | May 16 | September 24 | 131 | Warroad |
| Waseca S Rsch & Outreach Ctr | 1,153 ft | May 2 | October 4 | 155 | Waseca |
| Waskish 4NE | 1,191 ft | May 22 | September 17 | 118 | Ponemah |
| Wells | 1,135 ft | April 30 | October 6 | 159 | Wells |
| Wheaton | 1,018 ft | May 1 | October 9 | 161 | Wheaton |
| White Rock Dam | 1,024 ft | May 3 | October 3 | 153 | Wheaton |
| Wild Rvr SP | 840 ft | May 19 | September 25 | 129 | Shafer |
| Willmar 5N | 1,190 ft | May 1 | October 6 | 158 | Willmar |
| Willmar Wwtp | 1,100 ft | April 30 | October 7 | 160 | Willmar |
| Windom | 1,384 ft | April 30 | October 10 | 163 | Windom |
| Winnebago | 1,110 ft | April 27 | October 10 | 166 | Winnebago |
| Winona | 652 ft | April 21 | October 19 | 181 | Winona |
| Winona Dam 5 A | 663 ft | April 23 | October 21 | 181 | Goodview |
| Wolf Ridge Elc | 1,400 ft | May 15 | October 1 | 139 | Silver Bay |
| Worthington 2 Nne | 1,570 ft | May 3 | October 4 | 154 | Worthington |
| Wright 3 E | 1,330 ft | May 31 | September 18 | 110 | Floodwood |
| Zumbrota | 970 ft | May 9 | September 30 | 144 | Zumbrota |
Sources
NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.