Wyoming climate: Statewide normals, its places and each month, NOAA 1991-2020
Wyoming's statewide normal is 42.3°F a year with 16.0 inches of precipitation (NOAA nClimDiv, 1991-2020); it has warmed 2.3°F per century since 1895, and 2012 was its warmest year.
- Statewide normal temperature
- 42.3°Fyear, 1991-2020
- Statewide normal precipitation
- 16.0 inyear, 1991-2020
- Last five years against normal
- +0.9°F2021-2025 mean 43.1°F
- Places with normals
- 15871 Census places, 87 other stations
What is Wyoming's weather like each month?
Statewide, July is the warmest month and December the coldest. Each month has its own page with the warmest and coolest places that month:
- Jan32°11°
- Feb35°13°
- Mar45°21°
- Apr52°27°
- May62°36°
- Jun73°44°
- Jul82°51°
- Aug80°49°
- Sep70°40°
- Oct56°30°
- Nov42°19°
- Dec32°11°
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 32°F | 11°F | 21.8°F | 0.96 |
| February | 35°F | 13°F | 23.7°F | 0.99 |
| March | 45°F | 21°F | 32.7°F | 1.22 |
| April | 52°F | 27°F | 39.7°F | 1.80 |
| May | 62°F | 36°F | 49.0°F | 2.41 |
| June | 73°F | 44°F | 58.7°F | 1.72 |
| July | 82°F | 51°F | 66.5°F | 1.19 |
| August | 80°F | 49°F | 64.6°F | 1.01 |
| September | 70°F | 40°F | 55.4°F | 1.26 |
| October | 56°F | 30°F | 42.6°F | 1.40 |
| November | 42°F | 19°F | 30.5°F | 1.03 |
| December | 32°F | 11°F | 21.8°F | 1.03 |
Source: NOAA NCEI nClimDiv statewide series (Climate at a Glance); data files. Statewide values are area-weighted from a 5 km grid of station data, so they differ from the simple average of a state's stations.
Has Wyoming been warmer than normal?
3 of the 5 complete years since 2021 ran warmer than the 1991-2020 statewide normal of 42.3°F. The record since 1895 rises at a fitted 2.3°F per century; the warmest year was 2012 (44.8°F).
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 43.6°F | +1.4°F |
| 2022 | 42.0°F | −0.3°F |
| 2023 | 41.8°F | −0.5°F |
| 2024 | 44.2°F | +2.0°F |
| 2025 | 44.1°F | +1.9°F |
Source: NOAA NCEI nClimDiv statewide annual series.
Where is it warmest, wettest and snowiest in Wyoming?
Among the places PlainClimate covers, La Grange has the warmest year (50.0°F) and Darwin Ranch the coolest (31.3°F); Snake River is the wettest (32.8 in) and Deaver the driest (5.5 in), and Snake River gets the most snow (294 in).
| Place | Year | July high | January low | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|
| Cheyenne | 46.9°F | 84°F | 18°F | 15.4 | 63 | May 12 |
| Casper | 45.6°F | 89°F | 15°F | 12.2 | 72 | May 26 |
| Gillette | 45.8°F | 87°F | 14°F | 13.6 | – | May 22 |
| Laramie | 41.4°F | 81°F | 10°F | 10.5 | – | June 2 |
| Rock Springs | 43.7°F | 84°F | 14°F | 7.5 | 54 | May 22 |
| Sheridan | 45.4°F | 88°F | 12°F | 14.9 | – | May 21 |
| Evanston | 42.4°F | 82°F | 14°F | 9.5 | – | June 3 |
| Green River | 44.1°F | 87°F | 8°F | 10.3 | 39 | May 24 |
| Riverton | 44.5°F | 88°F | 8°F | 8.6 | – | May 16 |
| Jackson | 37.9°F | 79°F | 6°F | 17.6 | 78 | – |
| Cody | 46.8°F | 84°F | 18°F | 11.5 | 45 | May 12 |
| Rawlins | 43.1°F | 85°F | 13°F | 9.0 | – | June 1 |
| Lander | 45.1°F | 88°F | 10°F | 13.2 | 88 | May 18 |
| Powell | 43.2°F | 85°F | 6°F | 6.7 | 11 | May 19 |
| Douglas | 46.3°F | 89°F | 13°F | 11.2 | – | May 23 |
| Torrington | 49.1°F | 90°F | 16°F | 12.8 | – | May 11 |
| Worland | 44.6°F | 90°F | 3°F | 7.7 | – | May 13 |
| Buffalo | 46.4°F | 85°F | 17°F | 12.6 | – | May 13 |
| Wheatland | 49.0°F | 90°F | 17°F | 14.1 | 40 | May 19 |
| Newcastle | 47.3°F | 87°F | 14°F | 17.2 | 39 | May 13 |
| Thermopolis | 48.6°F | 92°F | 12°F | 11.9 | 27 | May 5 |
| Kemmerer | 38.5°F | 83°F | 2°F | 9.4 | 50 | – |
| Lovell | 44.9°F | 87°F | 7°F | 6.5 | 13 | May 9 |
| Afton | 38.5°F | 80°F | 5°F | 17.7 | 88 | June 20 |
| Pinedale | 37.5°F | 80°F | 2°F | 11.9 | 76 | – |
| Saratoga | 43.7°F | 84°F | 14°F | – | – | June 2 |
| Greybull | 46.2°F | 91°F | 6°F | 5.5 | – | May 4 |
| Lusk | 44.4°F | 84°F | 13°F | – | – | May 23 |
| Basin | 48.9°F | 93°F | 9°F | 7.2 | 20 | April 28 |
| Mountain View | 40.8°F | 80°F | 11°F | 11.0 | 64 | June 14 |
| Story | 43.5°F | 81°F | 15°F | 27.7 | 138 | May 24 |
| Sundance | 41.1°F | 75°F | 15°F | 29.2 | – | May 23 |
| Pine Bluffs | 48.2°F | 87°F | 17°F | 16.3 | – | May 10 |
| Guernsey | 48.7°F | 89°F | 14°F | 15.1 | – | May 7 |
| Moorcroft | 44.6°F | 86°F | 12°F | – | – | May 22 |
| Dubois | 40.5°F | 79°F | 13°F | 10.9 | 55 | – |
| Upton | 44.8°F | 87°F | 10°F | 16.2 | 46 | May 20 |
| Dayton | 43.9°F | 85°F | 10°F | 18.0 | 68 | May 24 |
| Alta | 40.5°F | 79°F | 12°F | 25.0 | 113 | June 14 |
| Shoshoni | 45.6°F | 90°F | 1°F | 8.0 | 18 | May 7 |
| Bedford | 38.6°F | 80°F | 6°F | 25.3 | – | – |
| Baggs | 43.7°F | 87°F | 7°F | 11.2 | 31 | June 1 |
| Lingle | 46.9°F | 89°F | 12°F | 14.8 | – | May 20 |
| La Barge | 39.1°F | 83°F | −2°F | 8.6 | 34 | June 9 |
| Big Piney | 36.5°F | 82°F | −3°F | 7.7 | – | – |
| Centennial | 40.6°F | 77°F | 12°F | – | – | June 2 |
| Hulett | 45.0°F | 86°F | 11°F | 18.4 | 49 | May 17 |
| Midwest | 45.0°F | 88°F | 12°F | 12.4 | 46 | May 22 |
| Kaycee | 45.2°F | 88°F | 10°F | 11.9 | 41 | May 18 |
| Glendo | 47.8°F | 88°F | 15°F | 14.4 | – | May 9 |
| Medicine Bow | 42.2°F | 85°F | 10°F | 11.2 | 52 | June 1 |
| Pavillion | 45.0°F | 86°F | 10°F | 8.8 | 28 | May 14 |
| Wamsutter | 42.3°F | 85°F | 9°F | 8.4 | 51 | June 5 |
| Farson | 37.8°F | 83°F | −4°F | 7.8 | 28 | – |
| Deaver | 46.1°F | 90°F | 7°F | 5.5 | 12 | May 6 |
| Chugwater | 47.8°F | 88°F | 18°F | 16.8 | 70 | May 18 |
| Albin | 48.3°F | 87°F | 18°F | 19.5 | 69 | May 14 |
| Daniel | 32.5°F | 77°F | −7°F | 11.6 | 64 | – |
| Elk Mountain | 43.3°F | 82°F | 15°F | 12.9 | 93 | May 28 |
| Yoder | 49.8°F | 92°F | 17°F | 15.0 | 47 | May 15 |
| Clearmont | 43.6°F | 85°F | 7°F | – | – | May 24 |
| Bondurant | 37.5°F | 80°F | 2°F | 20.1 | 141 | – |
| Cora | 35.1°F | 78°F | 1°F | – | – | – |
| Shell | 44.8°F | 89°F | 6°F | 10.1 | 28 | May 16 |
| Atlantic City | 36.5°F | 78°F | 1°F | 17.9 | – | – |
| Fontenelle | 38.2°F | 83°F | 0°F | 7.5 | 27 | – |
| Big Horn | 45.5°F | 84°F | 15°F | 18.6 | 81 | May 17 |
| Boulder | 36.0°F | 82°F | −7°F | 9.3 | 42 | – |
| Carpenter | 46.9°F | 87°F | 13°F | 15.3 | 35 | May 14 |
| Jeffrey City | 42.3°F | 85°F | 9°F | 9.9 | 60 | June 1 |
| Powder River | 44.6°F | 88°F | 10°F | – | – | May 23 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
What are Wyoming's all-time weather records?
The official state records, reviewed by NOAA's State Climate Extremes Committee: from 115°F to −66°F.
| Record | Value | Where | When |
|---|---|---|---|
| Highest temperature | 115°F | Diversion Dam (tied 2 times; the latest shown) | July 15, 1988 |
| Lowest temperature | −66°F | Riverside Ranger Stn. (Yellowstone NP) | February 9, 1933 |
| Most precipitation in 24 hours | 6.06 in | Cheyenne | August 1, 1985 |
| Most snow in 24 hours | 49 in | Hunter Station | March 21, 1924 |
| Deepest snow on the ground | 128 in | Grassy Lake Dam | February 4, 1943 |
Source: NOAA NCEI State Climate Extremes Committee records.
Which other NOAA stations in Wyoming keep normals?
87 stations in Wyoming that are not a town's own record keep 1991-2020 normals too: reservoirs and dams, parks and forests, research farms, remote sites and the second stations of towns (those are shown on the town's page). Each with its normal yearly mean:
- Archer46.7°F
- Bates Creek #244.0°F
- Billy Creek45.5°F
- Bitter Creek (4 mi NE)43.7°F
- Black Mountain46.8°F
- Boysen Dam46.4°F
- Buckboard Marina43.9°F
- Buffalo Bill Dam46.0°F
- Buffalo station43.4°F
- Burgess Junction34.5°F
- Burris42.9°F
- Casper (1 mi SW)47.1°F
- Casper Wastewater Treatment Plant47.4°F
- Cheyenne Weather Office46.6°F
- Church Buttes Gas Plant43.2°F
- Clark (3 mi NE)44.6°F
- Cody (12 mi SE)44.0°F
- Cody (21 mi SW)45.0°F
- Colony46.6°F
- Darwin Ranch31.3°F
- Devils Tower #244.4°F
- Dillinger45.0°F
- Diversion Dam43.5°F
- Double Four Ranch44.4°F
- Douglas (1 mi SE)46.3°F
- Dull Center (1 mi SE)47.6°F
- Echeta (2 mi NW)45.8°F
- Emblem44.9°F
- Evanston (1 mi E)42.0°F
- Fossil Butte38.4°F
- Gillette (4 mi SE)46.8°F
- Glendo (6 mi NE)44.7°F
- Greybull station45.0°F
- Guernsey Dam #248.6°F
- Heart Mountain45.6°F
- Hecla (1 mi E)45.0°F
- La Grange50.0°F
- Lake Yellowstone33.8°F
- Lamar Ranger Station37.3°F
- Lance Creek (11 mi NNE)46.5°F
- Lander (11 mi SSE)45.7°F
- Laramie (2 mi NW)40.6°F
- Laramie (4 mi SE)43.0°F
- Leiter (9 mi N)46.8°F
- Leo (6 mi SW)45.9°F
- Lusk (25 mi NE)47.6°F
- Moose38.4°F
- Moose (1 mi NNE)36.8°F
- Moran (5 mi WNW)35.6°F
- Muddy Gap45.4°F
- Old Faithful34.4°F
- Old Fort Laramie49.1°F
- Pahaska38.0°F
- Pathfinder Dam46.3°F
- Phillips47.9°F
- Pine Bluffs (5 mi W)46.7°F
- Powder River (School)43.7°F
- Rawlins (1 mi N)43.8°F
- Redbird47.6°F
- Riverton station44.0°F
- Rochelle (7 mi ENE)43.9°F
- Rock Springs Fire Dept45.0°F
- Sage (4 mi NNW)38.6°F
- Saratoga (4 mi N)40.8°F
- Seminoe Reservoir USBR43.9°F
- Sheridan Field Station44.9°F
- Shirley Basin38.0°F
- Snake River34.4°F
- South Pass City35.8°F
- Sundance station43.8°F
- Sunshine (3 mi NE)38.7°F
- Sybille Research Unit45.0°F
- Tensleep (16 mi SSE)42.1°F
- Tensleep (4 mi NE)47.7°F
- Thermopolis (21 mi WNW)44.6°F
- Thermopolis (9 mi NE)42.6°F
- Torrington (29 mi N)46.0°F
- Torrington Experiment Farm48.3°F
- Tower Falls36.9°F
- Wapiti (1 mi WSW)45.0°F
- Weston (1 mi E)45.5°F
- Whalen Dam USBR48.1°F
- Worland station45.7°F
- Wright (12 mi W)44.6°F
- Yellowstone Lake32.0°F
- Yellowstone National Park E Ent36.1°F
- Yellowstone Park Mammoth40.8°F
Source: NOAA NCEI 1991-2020 normals for each station.
Next
- Frost dates in WyomingLast spring and first autumn frost at every station
- Every stateCompare the statewide normals
- La Grange50.0°F a year, 16.0 in of precipitation
- Darwin Ranch31.3°F a year, 16.7 in of precipitation
- Snake River34.4°F a year, 32.8 in of precipitation
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