SowByZipgarden planner

Minnesota frost dates

Across 179 NOAA climate stations in Minnesota, the median last spring frost (32°F) ranges from Apr 15 at La Crescent Dam 7 to Jun 5 at Hibbing Chisholm Hibbing AP; the typical station sees its last frost around May 5 and its first fall frost around Oct 2.

“Median” dates have a 50% chance of a later spring frost or an earlier fall frost. “10% risk” dates are the safer choice for tender plants: only 1 year in 10 has frost beyond them. Source: NOAA NCEI 1991–2020 Climate Normals. Elevation matters: within a state, frost dates can differ by a month or more between valleys and hills.

StationElevationLast frost (median)Last frost (10% risk)First frost (median)First frost (10% risk)Growing season
Ada907 ftMay 11May 25Sep 27Sep 14137 days
Agassiz Refuge1,142 ftMay 6May 20Oct 3Sep 20148 days
Aitkin 2E1,215 ftMay 16Jun 1Sep 28Sep 12133 days
Albert Lea 3SE1,230 ftApr 27May 10Oct 9Sep 26164 days
Alexandria Muni AP1,416 ftMay 2May 15Oct 8Sep 27159 days
Amboy1,030 ftApr 30May 12Oct 7Sep 23161 days
Andover 1N899 ftMay 5May 21Oct 2Sep 18148 days
Argyle847 ftMay 15May 28Sep 26Sep 13134 days
Artichoke Lake 1 E1,098 ftMay 1May 14Oct 8Sep 26159 days
Austin Waste Wtp Facility1,199 ftApr 30May 11Oct 5Sep 22158 days
Babbitt1,481 ftMay 28Jun 16Sep 14Aug 29108 days
Baudette1,094 ftMay 14May 28Sep 26Sep 12135 days
Baudette Intl AP1,082 ftMay 15May 31Sep 26Sep 9132 days
Benson1,030 ftMay 4May 17Oct 3Sep 21151 days
Big Falls1,220 ftMay 24Jun 6Sep 20Sep 6117 days
Blackduck1,340 ftMay 24Jun 6Sep 17Sep 1115 days
Brainerd1,180 ftMay 8May 21Sep 29Sep 16141 days
Brainerd Crow Wing Co AP1,221 ftMay 13May 27Sep 27Sep 14138 days
Breckenridge 3E971 ftMay 4May 17Oct 3Sep 21152 days
Browns Valley978 ftMay 9May 22Sep 28Sep 15141 days
Brownton Wwtp1,040 ftApr 30May 13Oct 4Sep 21156 days
Bruno 7ENE1,253 ftMay 18Jun 1Sep 26Sep 12129 days
Buffalo 2NE992 ftApr 30May 13Oct 9Sep 25163 days
Byron 4north1,041 ftMay 12May 25Sep 28Sep 14139 days
Caledonia1,166 ftApr 29May 11Oct 10Sep 28165 days
Cambridge965 ftMay 2May 20Oct 4Sep 20153 days
Camp Norris Dnr1,289 ftMay 25Jun 6Sep 22Sep 5119 days
Canby1,210 ftMay 2May 14Oct 5Sep 23156 days
Cass Lake1,296 ftMay 17May 30Sep 26Sep 12131 days
Cedar907 ftMay 1May 17Oct 7Sep 23158 days
Celina 2E1,285 ftJun 1Jun 18Sep 15Aug 27104 days
Chanhassen Wsfo946 ftApr 30May 15Oct 9Sep 25160 days
Chaska 2NW923 ftMay 5May 19Oct 5Sep 22151 days
Cloquet1,265 ftMay 26Jun 9Sep 23Sep 9118 days
Collegeville St John'S1,210 ftMay 3May 17Oct 7Sep 25155 days
Cook 8NE1,355 ftMay 12May 29Oct 1Sep 17138 days
Cotton1,323 ftMay 27Jun 11Sep 20Sep 4115 days
Crookston Nw Exp Stn891 ftMay 11May 25Sep 27Sep 14138 days
Dassel 3SE1,065 ftApr 30May 12Oct 10Sep 28162 days
Deep Portage1,471 ftMay 5May 19Oct 5Sep 22150 days
Delano975 ftApr 30May 14Oct 8Sep 24159 days
Detroit Lakes 1 Nne1,355 ftMay 15May 30Sep 24Sep 9130 days
Detroit Lakes 12E1,542 ftMay 4May 16Oct 3Sep 22150 days
Duluth1,428 ftMay 13May 29Oct 1Sep 18140 days
Duluth Harbor Stn610 ftMay 14Jun 1Oct 12Sep 25149 days
Duluth NWS1,433 ftMay 18Jun 3Oct 1Sep 19135 days
Elk Rvr880 ftMay 4May 18Oct 5Sep 23154 days
Ely1,382 ftMay 24Jun 4Sep 23Sep 7121 days
Ely1,475 ftMay 14May 30Sep 29Sep 16135 days
Ely 25E1,444 ftMay 21Jun 3Sep 25Sep 11127 days
Eveleth Wwtp1,445 ftMay 12May 28Oct 1Sep 18141 days
Fairmont1,187 ftApr 25May 6Oct 14Sep 30171 days
Faribault970 ftMay 5May 19Oct 5Sep 21152 days
Farmington 3 Nw980 ftApr 27May 10Oct 10Sep 27166 days
Fergus Falls1,250 ftMay 4May 18Oct 5Sep 22152 days
Floodwood 3 Ne1,260 ftMay 29Jun 13Sep 18Sep 1111 days
Forest Lake 5NE905 ftMay 3May 19Oct 5Sep 22154 days
Fosston 1 E1,300 ftMay 15May 30Sep 26Sep 10132 days
Gaylord1,020 ftApr 24May 8Oct 15Sep 30170 days
Georgetown 1 E885 ftMay 9May 23Oct 1Sep 18143 days
Glenwood 2WNW1,198 ftMay 11May 27Sep 27Sep 13139 days
Goodridge 12 Nnw1,150 ftMay 20Jun 3Sep 17Sep 1118 days
Grand Marais612 ftMay 20Jun 6Oct 5Sep 22137 days
Grand Marais610 ftMay 22Jun 18Oct 9Sep 25136 days
Grand Meadow1,350 ftMay 6May 18Oct 1Sep 17146 days
Grand Portage730 ftMay 24Jun 5Sep 29Sep 16127 days
Grand Rpds Forest Lab1,310 ftMay 17May 31Sep 24Sep 10130 days
Granite Falls930 ftMay 4May 18Oct 1Sep 17150 days
Gull Lake Dam1,215 ftMay 2May 14Oct 6Sep 25156 days
Gunflint Lake 10 Nw1,455 ftMay 23Jun 7Sep 26Sep 11124 days
Hallock815 ftMay 8May 24Sep 30Sep 16142 days
Hastings Dam 2680 ftApr 23May 7Oct 19Oct 5177 days
Hibbing Chisholm Hibbing AP1,352 ftJun 5Jun 25Sep 8Aug 2393 days
Hinckley1,035 ftMay 16May 30Sep 24Sep 9130 days
Hutchinson 1 N1,095 ftApr 28May 10Oct 8Sep 25163 days
Intl Falls Intl AP1,183 ftMay 29Jun 16Sep 13Aug 30109 days
Isabella 14W1,740 ftMay 31Jun 21Sep 15Aug 30104 days
Island Lake 4E1,410 ftMay 21Jun 3Sep 27Sep 13129 days
Isle 12N1,285 ftMay 10May 28Oct 3Sep 19144 days
Itasca Univ Of Minn1,490 ftMay 18May 31Sep 27Sep 12130 days
Jordan 1SSW900 ftMay 2May 18Oct 5Sep 21153 days
Kabetogama1,200 ftMay 28Jun 12Sep 16Sep 1111 days
Kimball 3N1,160 ftMay 2May 15Oct 5Sep 23156 days
La Crescent Dam 7647 ftApr 15May 1Oct 28Oct 15194 days
Lake Wilson1,653 ftMay 7May 19Sep 29Sep 15145 days
Lakefield 2NE1,530 ftMay 2May 13Oct 2Sep 19153 days
Lamberton Sw Rsch & Outreach C1,140 ftMay 3May 15Oct 2Sep 18152 days
Leech Lake1,302 ftMay 8May 23Oct 1Sep 19144 days
Litchfield1,120 ftMay 6May 22Oct 2Sep 20147 days
Little Falls 2NNE1,120 ftMay 4May 22Oct 5Sep 22151 days
Littlefork 10 Sw1,200 ftMay 23Jun 5Sep 21Sep 4118 days
Long Prairie1,340 ftMay 13May 28Sep 27Sep 13134 days
Lower St Anthony Falls754 ftApr 23May 7Oct 16Oct 2175 days
Lutsen 3NNE1,300 ftMay 26Jun 6Sep 27Sep 13126 days
Mabel1,112 ftMay 10May 23Sep 28Sep 14140 days
Madison Wwtp1,075 ftMay 3May 15Oct 2Sep 20151 days
Mahnomen1,212 ftMay 7May 24Sep 28Sep 15143 days
Mankato850 ftApr 30May 12Oct 9Sep 25161 days
Marcell 5NE1,387 ftMay 14May 30Oct 2Sep 20140 days
Marshall1,149 ftMay 5May 18Oct 3Sep 21150 days
Melrose1,195 ftMay 4May 19Oct 1Sep 17148 days
Milaca1,064 ftMay 8May 26Oct 1Sep 17143 days
Milan 1NW1,020 ftMay 3May 17Oct 2Sep 18151 days
Minneapolis/St Paul AP872 ftApr 23May 7Oct 18Oct 1176 days
Minnesota City Dam 5670 ftApr 23May 6Oct 16Oct 2175 days
Montevideo 1SW990 ftMay 4May 17Oct 1Sep 18149 days
Moorhead904 ftMay 5May 20Oct 3Sep 22150 days
Moose Lake 1 Sse1,110 ftMay 12May 26Oct 2Sep 20144 days
Mora1,018 ftMay 9May 26Sep 30Sep 17142 days
Morris W Cntrl Rsch & Outreach1,140 ftMay 4May 17Oct 1Sep 19150 days
Mpls Crystal AP861 ftApr 30May 17Oct 8Sep 26159 days
Mpls Flying Cloud AP907 ftApr 23May 6Oct 14Sep 28172 days
New Hope910 ftApr 29May 12Oct 12Sep 29163 days
New London1,250 ftMay 4May 19Oct 4Sep 23152 days
New Ulm 2 Se890 ftApr 29May 12Oct 7Sep 22161 days
New Ulm 3SE925 ftMay 2May 14Oct 7Sep 23157 days
New York Mills1,406 ftMay 10May 24Sep 29Sep 17141 days
Northome 3S1,415 ftMay 16May 30Sep 26Sep 11131 days
Olivia 3E1,100 ftMay 6May 20Oct 1Sep 15146 days
Orr 3E1,315 ftJun 2Jun 17Sep 15Aug 29102 days
Ottertail1,349 ftMay 5May 18Oct 5Sep 23153 days
Owatonna1,140 ftMay 5May 20Oct 6Sep 23154 days
Park Rapids Muni AP1,434 ftMay 14May 27Sep 25Sep 12133 days
Pine Rvr Dam1,250 ftMay 6May 19Oct 7Sep 24152 days
Pipestone1,705 ftMay 4May 19Oct 2Sep 20152 days
Pokegama Dam1,280 ftMay 16May 31Oct 1Sep 18138 days
Preston930 ftMay 14May 27Sep 28Sep 15136 days
Red Lake Falls1,038 ftMay 9May 24Sep 30Sep 16142 days
Red Lake Indian Agcy1,216 ftMay 12May 30Oct 4Sep 19142 days
Red Wing Dam 3677 ftApr 23May 7Oct 14Sep 28173 days
Redwood Falls1,020 ftApr 30May 14Oct 10Sep 26162 days
Redwood Falls Muni AP1,021 ftApr 30May 14Oct 4Sep 21157 days
Rice1,060 ftMay 10May 22Sep 29Sep 15140 days
Rochester Intl AP1,304 ftApr 30May 13Oct 6Sep 22159 days
Rosemount Rsch & Outreach Ctr945 ftMay 2May 16Oct 5Sep 22155 days
Rothsay1,204 ftMay 5May 20Oct 3Sep 21149 days
Rushford770 ftMay 8May 22Oct 3Sep 21147 days
Sandstone 6 W1,130 ftMay 13May 28Sep 29Sep 15137 days
Sandy Lake Dam Libby1,234 ftMay 7May 21Oct 3Sep 20148 days
Santiago 3 E1,010 ftMay 7May 22Sep 28Sep 15144 days
Sherburn 3WSW1,320 ftApr 28May 9Oct 8Sep 23162 days
Springfield 1 Nw1,066 ftMay 4May 15Oct 1Sep 17150 days
St Cloud Rgnl AP1,018 ftMay 7May 23Sep 30Sep 16144 days
St James Wwtp1,070 ftApr 30May 13Oct 7Sep 25160 days
St Paul900 ftApr 26May 11Oct 12Sep 27166 days
St Paul 3SW925 ftApr 25May 9Oct 12Oct 1169 days
St Paul Downtown AP700 ftApr 24May 10Oct 16Oct 2174 days
St Peter795 ftMay 2May 14Oct 4Sep 21153 days
Stillwater 1 Se710 ftApr 22May 6Oct 19Oct 3178 days
Stillwater 2SW898 ftApr 30May 13Oct 11Sep 28163 days
Tamarac Wildlife Re1,508 ftMay 5May 18Oct 3Sep 22150 days
Theilman 1SSW753 ftMay 7May 22Oct 2Sep 20148 days
Thief Rvr Falls 21,128 ftMay 14May 29Sep 28Sep 14135 days
Thorhult1,237 ftMay 24Jun 7Sep 20Sep 4120 days
Tracy1,403 ftMay 2May 15Oct 5Sep 22156 days
Two Harbors625 ftMay 12May 30Oct 6Sep 19145 days
Two Harbors 7NW1,355 ftMay 27Jun 10Sep 23Sep 7117 days
U Of Mn St Paul970 ftApr 28May 14Oct 8Sep 25162 days
Vadnais Lake890 ftApr 23May 7Oct 20Oct 3177 days
Wadena 3 S1,372 ftMay 10May 25Sep 30Sep 17141 days
Walker1,430 ftMay 4May 20Oct 7Sep 23155 days
Warren Wsd855 ftMay 5May 22Oct 2Sep 20147 days
Warroad1,073 ftMay 16May 30Sep 24Sep 11129 days
Waseca S Rsch & Outreach Ctr1,153 ftMay 2May 14Oct 4Sep 20155 days
Waskish 4NE1,191 ftMay 22Jun 5Sep 17Sep 2117 days
Wells1,135 ftApr 30May 14Oct 6Sep 24158 days
Wheaton1,018 ftMay 1May 12Oct 9Sep 26160 days
White Rock Dam1,024 ftMay 3May 15Oct 3Sep 22154 days
Wild Rvr Sp840 ftMay 19Jun 3Sep 25Sep 10128 days
Willmar 5N1,190 ftMay 1May 12Oct 6Sep 23156 days
Willmar Wwtp1,100 ftApr 30May 13Oct 7Sep 23159 days
Windom1,384 ftApr 30May 13Oct 10Sep 25162 days
Winnebago1,110 ftApr 27May 8Oct 10Sep 27166 days
Winona652 ftApr 21May 4Oct 19Oct 4180 days
Winona Dam 5 A663 ftApr 23May 6Oct 21Oct 7180 days
Wolf Ridge Elc1,400 ftMay 15May 31Oct 1Sep 17137 days
Worthington 2 Nne1,570 ftMay 3May 15Oct 4Sep 21153 days
Wright 3 E1,330 ftMay 31Jun 20Sep 18Sep 1107 days
Zumbrota970 ftMay 9May 22Sep 30Sep 17144 days
Advertisement