First & Last Frost Dates of Wyoming Cities and Towns

  • SheelaBy
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Wyoming’s growing season is different from place to place. Some areas have long growing times, like Basin (171 days) and Thermopolis (159 days). Others, especially in the mountains like Daniel (24 days) and Jackson (58 days), have much shorter times. This affects what plants can grow and when people can grow them.

Lower areas and valleys are usually warmer, and mountain areas are cooler with less growing time. Cities like Casper and Newcastle can grow plants for about 151 days, but mountain cities like Laramie only get about 98 days.

This guide helps you find frost dates in Wyoming cities and towns by showing you the closest weather stations.

Wyoming Frost Dates Map

Please type or select your Wyoming location in the selection box, to find its frost dates info.

Wyoming Frost Dates Map

City Name

Wyoming Frost Dates

Spring Last Frost
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Fall First Frost
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The nearest weather station to your location is — and is located at a distance of —.
These dates are based on NOAA Data with 30% probability derived from “U.S. Climate Normals 2020: U.S. Annual/Seasonal Climate Normals (1991-2020)”. This means there is a 30% chance that the first fall frost may occur before the shown date, and the last spring frost may occur after the shown date.

First & Last Frost Dates of Wyoming Cities and Towns

The “Last Spring Frost Date” shows when it’s usually safe to plant (like May 3 in Basin or June 27 in Afton). The “First Fall Frost Date” tells when cold weather returns (from late August in some mountain areas to early October in warmer spots).

The data is taken from USA government official wether records and the frost dates are shown at 30% probability.

City Station ID Distance (mi) Fall First Frost Spring Last Frost Growing Season (Days)
Cheyenne USC00481676 1.09 09/26 05/20 145.0
Casper USC00481572 0.73 09/27 05/18 151.0
Gillette USC00483855 2.89 09/25 05/21 144.0
Laramie USC00485435 2.13 08/29 06/15 98.0
Rock Springs USC00487847 2.00 09/18 05/31 130.0
Sheridan USW00024029 2.02 09/18 05/27 131.0
Evanston USC00483100 0.68 09/06 06/20 99.0
Green River USC00484065 0.85 09/17 05/31 130.0
Riverton USC00487760 0.52 09/19 05/18 140.0
Cody USC00481840 3.16 09/25 05/18 149.0
Rawlins USC00487529 0.88 09/27 05/22 146.0
Lander USW00024021 1.25 09/22 05/25 140.0
Powell USC00487388 1.56 09/15 05/26 131.0
Douglas USC00482685 1.43 09/18 05/25 133.0
Torrington USW00094053 1.63 09/24 05/17 147.0
Ranchettes USW00024018 4.68 09/27 05/18 148.0
Worland USC00489770 0.75 09/28 05/10 156.0
Buffalo USC00481165 0.43 09/15 05/31 127.0
Mills USC00481569 4.75 09/23 05/16 145.0
Fox Farm-College USC00481676 2.79 09/26 05/20 145.0
South Greeley USC00481676 3.79 09/26 05/20 145.0
Wheatland USC00489615 3.89 09/16 05/24 133.0
Newcastle USC00486660 0.88 09/26 05/18 151.0
Bar Nunn USC00481569 4.42 09/23 05/16 145.0
Warren AFB USC00481676 3.00 09/26 05/20 145.0
Evansville USC00481572 0.98 09/27 05/18 151.0
Thermopolis USC00488875 0.45 09/30 05/11 159.0
North Rock Springs USC00487847 4.74 09/18 05/31 130.0
Glenrock USC00481572 20.89 09/27 05/18 151.0
Lovell USC00485770 0.70 09/24 05/15 149.0
Afton USC00480027 0.77 08/27 06/27 80.0
Lyman USC00486555 4.85 09/03 06/21 93.0
Saratoga USC00487990 0.16 08/30 06/09 113.0
Greybull USC00484080 0.13 09/18 05/16 140.0
Wright USC00489805 12.07 09/17 05/31 128.0
Arapahoe USW00024061 7.21 09/23 05/22 141.0
Fort Washakie USW00024021 15.39 09/22 05/25 140.0
Ethete USW00024021 14.68 09/22 05/25 140.0
Lusk USC00485830 1.68 09/14 05/31 128.0
Sleepy Hollow USC00483855 2.69 09/25 05/21 144.0
Basin USC00480540 0.20 10/04 05/03 171.0
Mountain View town USC00486555 0.24 09/03 06/21 93.0
Grover USC00480027 4.11 08/27 06/27 80.0
Ranchester USC00482399 5.36 09/11 05/30 123.0
Pine Bluffs USC00487236 0.63 09/26 05/15 149.0
Guernsey USC00484131 1.59 10/01 05/13 159.0
Sundance USC00488705 1.02 09/19 05/27 132.0
Powder Horn USC00487375 15.45 09/16 06/04 124.0
Moorcroft USW00024088 3.37 09/21 05/29 136.0
Story USC00488626 0.96 09/17 05/31 129.0
Teton Village USC00486428 7.16 08/25 06/27 79.0
Hartrandt USC00481569 3.49 09/23 05/16 145.0
Upton USC00489205 0.95 09/16 05/27 132.0
Cowley USC00485770 4.50 09/24 05/15 149.0
Dayton USC00482399 0.11 09/11 05/30 123.0
Osmond USC00480027 3.83 08/27 06/27 80.0
Vista West USW00024089 2.80 09/15 06/01 125.0
Red Butte USW00024089 6.49 09/15 06/01 125.0
Casper Mountain USC00480552 7.73 09/21 05/28 133.0
Hanna USC00482995 14.73 09/07 06/02 117.0
Lucerne USC00488884 2.09 09/11 05/31 119.0
Alta USC00480140 1.32 09/04 06/21 94.0
Byron USC00485770 5.79 09/24 05/15 149.0
Purple Sage USC00487847 4.76 09/18 05/31 130.0
Pine Haven USW00024088 11.37 09/21 05/29 136.0
Bear River USW00004111 7.68 09/20 06/09 122.0
Boulder Flats USW00024021 7.68 09/22 05/25 140.0
James Town USC00484065 3.59 09/17 05/31 130.0
Smoot USC00480027 7.79 08/27 06/27 80.0
Clearview Acres USC00487847 1.94 09/18 05/31 130.0
Shoshoni USC00488209 0.10 09/29 05/12 152.0
Parkman USC00482399 6.50 09/11 05/30 123.0
Encampment USC00487990 17.05 08/30 06/09 113.0
Hudson USW00024021 9.57 09/22 05/25 140.0
Rolling Hills USC00481572 22.57 09/27 05/18 151.0
Baggs USC00480484 0.17 09/12 06/07 117.0
Lingle USC00485612 2.33 09/17 05/28 130.0
La Barge USC00485252 0.17 08/30 06/16 93.0
LaGrange USC00485260 0.23 09/25 05/19 145.0
Burlington USC00483031 4.02 09/22 05/18 143.0
Auburn USC00480027 5.81 08/27 06/27 80.0
Burns USC00481547 7.56 09/21 05/19 140.0
Sinclair USW00024057 4.94 09/10 06/07 113.0
Centennial USC00481610 1.24 09/13 06/09 114.0
Hulett USC00484760 0.20 09/17 05/22 136.0
Y-O Ranch USC00489615 5.54 09/16 05/24 133.0
Midwest USC00486195 0.19 09/16 05/29 129.0
Kaycee USC00485055 0.29 09/19 05/23 136.0
Ten Sleep USC00488852 4.04 09/26 05/17 150.0
Glendo USC00483944 3.86 09/30 05/14 155.0
Medicine Bow USC00486120 0.12 09/04 06/06 105.0
East Thermopolis USC00488875 0.30 09/30 05/11 159.0
Johnstown USC00487115 8.82 09/25 05/20 146.0
Pavillion USC00487115 0.22 09/25 05/20 146.0
Rock River USC00486120 16.05 09/04 06/06 105.0
Hill View Heights USC00486660 2.18 09/26 05/18 151.0
Fort Laramie USC00486852 2.05 09/21 05/19 142.0
Kelly USC00486428 5.15 08/25 06/27 79.0
Homa Hills USW00024089 7.71 09/15 06/01 125.0
Wamsutter USC00489459 0.10 09/09 06/11 110.0
Garland USC00487388 4.85 09/15 05/26 131.0
Superior USW00024027 12.54 09/23 05/31 135.0
Woods Landing-Jelm USC00481610 14.09 09/13 06/09 114.0
Crowheart USC00481284 5.63 09/08 06/08 114.0
Carpenter USC00481547 2.78 09/21 05/19 140.0
Chugwater USC00481730 0.19 09/18 05/25 138.0
Fort Bridger USC00486555 4.27 09/03 06/21 93.0
Deaver USC00482415 0.34 09/27 05/13 155.0
Ralston USC00484411 4.54 09/20 05/22 141.0
Albin USC00480080 1.24 09/27 05/18 149.0
Edgerton USC00486195 1.51 09/16 05/29 129.0
Urie USC00486555 3.47 09/03 06/21 93.0
Elk Mountain USC00482995 0.11 09/07 06/02 117.0
Frannie USC00482415 5.52 09/27 05/13 155.0
Yoder USC00489925 4.75 09/21 05/21 139.0
Clearmont USC00481816 5.39 09/11 05/30 122.0
Bessemer Bend USW00024089 10.06 09/15 06/01 125.0
Meadow Acres USC00481572 9.69 09/27 05/18 151.0
Granger USC00481736 14.90 09/22 06/02 133.0
Manville USC00485830 7.21 09/14 05/31 128.0
Brookhurst USC00481572 2.46 09/27 05/18 151.0
Manderson USC00480540 8.39 10/04 05/03 171.0
Orin USC00482685 10.69 09/18 05/25 133.0
Chugcreek USC00489615 4.61 09/16 05/24 133.0
Lakeview North USC00489615 1.13 09/16 05/24 133.0
Fairview USC00480027 4.36 08/27 06/27 80.0
Alcova USC00487105 8.90 10/01 05/15 155.0
Reliance USC00487847 6.68 09/18 05/31 130.0
Kirby USC00488884 4.02 09/11 05/31 119.0
McKinnon USC00481131 21.70 09/17 06/01 127.0
Whiting USC00489615 6.83 09/16 05/24 133.0
Dixon USC00480484 6.38 09/12 06/07 117.0
Arrowhead Springs USC00487847 6.47 09/18 05/31 130.0
Big Horn USC00480680 0.83 09/22 05/23 140.0
Robertson USC00486555 6.82 09/03 06/21 93.0
Mammoth USC00489905 0.13 09/08 06/10 111.0
Point of Rocks USW00024027 15.02 09/23 05/31 135.0
Bairoil USC00486595 10.08 09/21 05/31 136.0
Hartville USC00484126 3.18 09/27 05/16 151.0
Riverside USC00487990 16.32 08/30 06/09 113.0
Westview Circle USC00489615 6.74 09/16 05/24 133.0
Slater USC00481730 7.85 09/18 05/25 138.0
Lance Creek USC00485374 10.57 09/18 05/25 136.0
Esterbrook USC00482680 16.19 09/03 06/10 107.0
Washam USC00481131 18.27 09/17 06/01 127.0
Hyattville USC00488852 16.63 09/26 05/17 150.0
Hawk Springs USC00489925 10.84 09/21 05/21 139.0
Jeffrey City USC00484925 0.10 09/08 06/06 112.0
Osage USC00489205 12.19 09/16 05/27 132.0
Hillsdale USC00480270 10.19 09/18 05/28 131.0
Ryan Park USC00487990 17.85 08/30 06/09 113.0
Van Tassell USC00488997 12.56 09/23 05/23 140.0
Little America USC00481736 15.58 09/22 06/02 133.0
Albany USC00481610 8.95 09/13 06/09 114.0
El Rancho USC00487375 15.45 09/16 06/04 124.0
Huntley USW00094053 9.13 09/24 05/17 147.0
Lonetree USC00486555 17.45 09/03 06/21 93.0
Arvada USC00485506 15.63 09/24 05/20 145.0
Fox Park USC00481610 16.23 09/13 06/09 114.0
Lost Springs USC00483936 16.40 09/10 05/31 119.0

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