Frost dates
Frost dates in Minnesota
Typical last spring frost and first fall frost for 179 weather stations across Minnesota, from NOAA’s 1991–2020 climate normals.
Last spring frost
Apr 27 – May 24
Typical across Minnesota (middle: May 5)
First fall frost
Sep 23 – Oct 11
Typical across Minnesota (middle: Oct 2)
Your own yard can differ by weeks from the nearest town. Get frost dates for your exact spot →
By town
| Station | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Ada | May 11 | Sep 27 | 139 |
| Agassiz Refuge | May 6 | Oct 3 | 150 |
| Aitkin 2 E | May 16 | Sep 28 | 135 |
| Albert Lea 3 SE | Apr 27 | Oct 9 | 165 |
| Alexandria Municipal Airport | May 2 | Oct 8 | 159 |
| Amboy | Apr 30 | Oct 7 | 160 |
| Andover 1 N | May 5 | Oct 2 | 150 |
| Argyle | May 15 | Sep 26 | 134 |
| Artichoke Lake 1 E | May 1 | Oct 8 | 160 |
| Austin Waste Wtp Facility | Apr 30 | Oct 5 | 158 |
| Babbitt | May 28 | Sep 14 | 109 |
| Baudette | May 14 | Sep 26 | 135 |
| Baudette International Airport | May 15 | Sep 26 | 134 |
| Benson | May 4 | Oct 3 | 152 |
| Big Falls | May 24 | Sep 20 | 119 |
| Blackduck | May 24 | Sep 17 | 116 |
| Brainerd | May 8 | Sep 29 | 144 |
| Brainerd Crow Wing County Airport | May 13 | Sep 27 | 137 |
| Breckenridge 3 E | May 4 | Oct 3 | 152 |
| Browns Valley | May 9 | Sep 28 | 142 |
| Brownton Water Plant | Apr 30 | Oct 4 | 157 |
| Bruno 7 ENE | May 18 | Sep 26 | 131 |
| Buffalo 2 NE | Apr 30 | Oct 9 | 162 |
| Byron 4North | May 12 | Sep 28 | 139 |
| Caledonia | Apr 29 | Oct 10 | 164 |
| Cambridge | May 2 | Oct 4 | 155 |
| Camp Norris Dnr | May 25 | Sep 22 | 120 |
| Canby | May 2 | Oct 5 | 156 |
| Cass Lake | May 17 | Sep 26 | 132 |
| Cedar | May 1 | Oct 7 | 159 |
| Celina 2 E | Jun 1 | Sep 15 | 106 |
| Chanhassen Wsfo | Apr 30 | Oct 9 | 162 |
| Chaska 2 NW | May 5 | Oct 5 | 153 |
| Cloquet | May 26 | Sep 23 | 120 |
| Collegeville St John'S | May 3 | Oct 7 | 157 |
| Cook 8 NE | May 12 | Oct 1 | 142 |
| Cotton | May 27 | Sep 20 | 116 |
| Crookston NW Experiment Station | May 11 | Sep 27 | 139 |
| Dassel 3 SE | Apr 30 | Oct 10 | 163 |
| Deep Portage | May 5 | Oct 5 | 153 |
| Delano | Apr 30 | Oct 8 | 161 |
| Detroit Lakes 1 NNE | May 15 | Sep 24 | 132 |
| Detroit Lakes 12 E | May 4 | Oct 3 | 152 |
| Duluth | May 13 | Oct 1 | 141 |
| Duluth Harbor Station | May 14 | Oct 12 | 151 |
| Duluth Nws | May 18 | Oct 1 | 136 |
| Elk Rvr | May 4 | Oct 5 | 154 |
| Ely | May 24 | Sep 23 | 122 |
| Ely | May 14 | Sep 29 | 138 |
| Ely 25 E | May 21 | Sep 25 | 127 |
| Eveleth Water Plant | May 12 | Oct 1 | 142 |
| Fairmont | Apr 25 | Oct 14 | 172 |
| Faribault | May 5 | Oct 5 | 153 |
| Farmington 3 NW | Apr 27 | Oct 10 | 166 |
| Fergus Falls | May 4 | Oct 5 | 154 |
| Floodwood 3 NE | May 29 | Sep 18 | 112 |
| Forest Lake 5 NE | May 3 | Oct 5 | 155 |
| Fosston 1 E | May 15 | Sep 26 | 134 |
| Gaylord | Apr 24 | Oct 15 | 174 |
| Georgetown 1 E | May 9 | Oct 1 | 145 |
| Glenwood 2 WNW | May 11 | Sep 27 | 139 |
| Goodridge 12 NNW | May 20 | Sep 17 | 120 |
| Grand Marais | May 20 | Oct 5 | 138 |
| Grand Marais | May 22 | Oct 9 | 140 |
| Grand Meadow | May 6 | Oct 1 | 148 |
| Grand Portage | May 24 | Sep 29 | 128 |
| Grand Rpds Forest Lab | May 17 | Sep 24 | 130 |
| Granite Falls | May 4 | Oct 1 | 150 |
| Gull Lake Dam | May 2 | Oct 6 | 157 |
| Gunflint Lake 10 NW | May 23 | Sep 26 | 126 |
| Hallock | May 8 | Sep 30 | 145 |
| Hastings Dam 2 | Apr 23 | Oct 19 | 179 |
| Hibbing Chisholm Hibbing Airport | Jun 5 | Sep 8 | 95 |
| Hinckley | May 16 | Sep 24 | 131 |
| Hutchinson 1 N | Apr 28 | Oct 8 | 163 |
| International Falls International Airport | May 29 | Sep 13 | 107 |
| Isabella 14 W | May 31 | Sep 15 | 107 |
| Island Lake 4 E | May 21 | Sep 27 | 129 |
| Isle 12 N | May 10 | Oct 3 | 146 |
| Itasca Univ Of Minn | May 18 | Sep 27 | 132 |
| Jordan 1 SSW | May 2 | Oct 5 | 156 |
| Kabetogama | May 28 | Sep 16 | 111 |
| Kimball 3 N | May 2 | Oct 5 | 156 |
| La Crescent Dam 7 | Apr 15 | Oct 28 | 196 |
| Lake Wilson | May 7 | Sep 29 | 145 |
| Lakefield 2 NE | May 2 | Oct 2 | 153 |
| Lamberton SW Rsch & Outreach C | May 3 | Oct 2 | 152 |
| Leech Lake | May 8 | Oct 1 | 146 |
| Litchfield | May 6 | Oct 2 | 149 |
| Little Falls 2 NNE | May 4 | Oct 5 | 154 |
| Littlefork 10 SW | May 23 | Sep 21 | 121 |
| Long Prairie | May 13 | Sep 27 | 137 |
| Lower St Anthony Falls | Apr 23 | Oct 16 | 176 |
| Lutsen 3 NNE | May 26 | Sep 27 | 124 |
| Mabel | May 10 | Sep 28 | 141 |
| Madison Water Plant | May 3 | Oct 2 | 152 |
| Mahnomen | May 7 | Sep 28 | 144 |
| Mankato | Apr 30 | Oct 9 | 162 |
| Marcell 5 NE | May 14 | Oct 2 | 141 |
| Marshall | May 5 | Oct 3 | 151 |
| Melrose | May 4 | Oct 1 | 150 |
| Milaca | May 8 | Oct 1 | 146 |
| Milan 1 NW | May 3 | Oct 2 | 152 |
| Minneapolis/St Paul Airport | Apr 23 | Oct 18 | 178 |
| Minnesota City Dam 5 | Apr 23 | Oct 16 | 176 |
| Montevideo 1 SW | May 4 | Oct 1 | 150 |
| Moorhead | May 5 | Oct 3 | 151 |
| Moose Lake 1 SSE | May 12 | Oct 2 | 143 |
| Mora | May 9 | Sep 30 | 144 |
| Morris W Cntrl Rsch & Outreach | May 4 | Oct 1 | 150 |
| Mpls Crystal Airport | Apr 30 | Oct 8 | 161 |
| Mpls Flying Cloud Airport | Apr 23 | Oct 14 | 174 |
| New Hope | Apr 29 | Oct 12 | 166 |
| New London | May 4 | Oct 4 | 153 |
| New Ulm 2 SE | Apr 29 | Oct 7 | 161 |
| New Ulm 3 SE | May 2 | Oct 7 | 158 |
| New York Mills | May 10 | Sep 29 | 142 |
| Northome 3 S | May 16 | Sep 26 | 133 |
| Olivia 3 E | May 6 | Oct 1 | 148 |
| Orr 3 E | Jun 2 | Sep 15 | 105 |
| Ottertail | May 5 | Oct 5 | 153 |
| Owatonna | May 5 | Oct 6 | 154 |
| Park Rapids Municipal Airport | May 14 | Sep 25 | 134 |
| Pine Rvr Dam | May 6 | Oct 7 | 154 |
| Pipestone | May 4 | Oct 2 | 151 |
| Pokegama Dam | May 16 | Oct 1 | 138 |
| Preston | May 14 | Sep 28 | 137 |
| Red Lake Falls | May 9 | Sep 30 | 144 |
| Red Lake Indian Agcy | May 12 | Oct 4 | 145 |
| Red Wing Dam 3 | Apr 23 | Oct 14 | 174 |
| Redwood Falls | Apr 30 | Oct 10 | 163 |
| Redwood Falls Municipal Airport | Apr 30 | Oct 4 | 157 |
| Rice | May 10 | Sep 29 | 142 |
| Rochester International Airport | Apr 30 | Oct 6 | 159 |
| Rosemount Rsch & Outreach Ctr | May 2 | Oct 5 | 156 |
| Rothsay | May 5 | Oct 3 | 151 |
| Rushford | May 8 | Oct 3 | 148 |
| Sandstone 6 W | May 13 | Sep 29 | 139 |
| Sandy Lake Dam Libby | May 7 | Oct 3 | 149 |
| Santiago 3 E | May 7 | Sep 28 | 144 |
| Sherburn 3 WSW | Apr 28 | Oct 8 | 163 |
| Springfield 1 NW | May 4 | Oct 1 | 150 |
| St Cloud Regional Airport | May 7 | Sep 30 | 146 |
| St James Water Plant | Apr 30 | Oct 7 | 160 |
| St Paul | Apr 26 | Oct 12 | 169 |
| St Paul 3 SW | Apr 25 | Oct 12 | 170 |
| St Paul Downtown Airport | Apr 24 | Oct 16 | 175 |
| St Peter | May 2 | Oct 4 | 155 |
| Stillwater 1 SE | Apr 22 | Oct 19 | 180 |
| Stillwater 2 SW | Apr 30 | Oct 11 | 164 |
| Tamarac Wildlife Re | May 5 | Oct 3 | 151 |
| Theilman 1 SSW | May 7 | Oct 2 | 148 |
| Thief Rvr Falls 2 | May 14 | Sep 28 | 137 |
| Thorhult | May 24 | Sep 20 | 119 |
| Tracy | May 2 | Oct 5 | 156 |
| Two Harbors | May 12 | Oct 6 | 147 |
| Two Harbors 7 NW | May 27 | Sep 23 | 119 |
| U Of Mn St Paul | Apr 28 | Oct 8 | 163 |
| Vadnais Lake | Apr 23 | Oct 20 | 180 |
| Wadena 3 S | May 10 | Sep 30 | 143 |
| Walker | May 4 | Oct 7 | 156 |
| Warren Wsd | May 5 | Oct 2 | 150 |
| Warroad | May 16 | Sep 24 | 131 |
| Waseca S Rsch & Outreach Ctr | May 2 | Oct 4 | 155 |
| Waskish 4 NE | May 22 | Sep 17 | 118 |
| Wells | Apr 30 | Oct 6 | 159 |
| Wheaton | May 1 | Oct 9 | 161 |
| White Rock Dam | May 3 | Oct 3 | 153 |
| Wild Rvr Sp | May 19 | Sep 25 | 129 |
| Willmar 5 N | May 1 | Oct 6 | 158 |
| Willmar Water Plant | Apr 30 | Oct 7 | 160 |
| Windom | Apr 30 | Oct 10 | 163 |
| Winnebago | Apr 27 | Oct 10 | 166 |
| Winona | Apr 21 | Oct 19 | 181 |
| Winona Dam 5 A | Apr 23 | Oct 21 | 181 |
| Wolf Ridge Elc | May 15 | Oct 1 | 139 |
| Worthington 2 NNE | May 3 | Oct 4 | 154 |
| Wright 3 E | May 31 | Sep 18 | 110 |
| Zumbrota | May 9 | Sep 30 | 144 |
Each date is the median: in half of years the frost comes earlier, in half later. Frost here means a low of 32°F or colder at the station. Low spots and valleys often frost a week or two earlier than these dates; hillsides and city centers later.
Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020. The Field almanac also shows how often frost comes early or late, and a reanalysis reading for your exact location.