Wyoming weather in May: Statewide normals and every place, NOAA 1991-2020
In May, Wyoming's statewide normal high is 62°F and normal low 36°F; normal highs run from 55°F in Sundance to 73°F in Basin (NOAA 1991-2020 normals).
- Statewide normal high
- 62°FMay, 1991-2020
- Statewide normal low
- 36°FMay, 1991-2020
- Statewide normal precipitation
- 2.41 inMay
- Warmest place
- 73°Fnormal high, Basin
- Coolest place
- 55°Fnormal high, Sundance
Where is Wyoming warmest and wettest in May?
Basin has the warmest May afternoons (73°F) and Sundance the coolest (55°F). Story gets the most precipitation (4.67 in) and Deaver the least (1.10 in). The most snow falls in Jeffrey City (5.6 inches).
Statewide, May averaged 48.8°F in 2021, 46.9°F in 2022, 52.9°F in 2023, 46.5°F in 2024, 50.6°F in 2025, 50.3°F in 2026, against a 1991-2020 normal of 49.0°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Cheyenne | 64°F | 40°F | 2.44 | 3.4 |
| Casper | 67°F | 37°F | 2.21 | 2.6 |
| Gillette | 65°F | 39°F | 2.63 | – |
| Laramie | 62°F | 33°F | 1.75 | – |
| Rock Springs | 63°F | 38°F | 1.27 | 2.7 |
| Sheridan | 66°F | 39°F | 2.68 | – |
| Evanston | 61°F | 37°F | 1.75 | – |
| Green River | 66°F | 38°F | 1.67 | 0.9 |
| Riverton | 67°F | 40°F | 1.92 | – |
| Jackson | 60°F | 32°F | 1.83 | 0.6 |
| Cody | 64°F | 42°F | 2.18 | 0.8 |
| Rawlins | 64°F | 36°F | 1.46 | – |
| Lander | 66°F | 39°F | 2.68 | 4.5 |
| Powell | 66°F | 40°F | 1.22 | 0.1 |
| Douglas | 67°F | 39°F | 2.32 | – |
| Torrington | 70°F | 42°F | 2.53 | – |
| Worland | 70°F | 40°F | 1.66 | – |
| Buffalo | 63°F | 41°F | 2.73 | – |
| Wheatland | 71°F | 39°F | 2.70 | 1.4 |
| Newcastle | 66°F | 43°F | 2.90 | 0.6 |
| Thermopolis | 71°F | 43°F | 2.53 | 0.2 |
| Kemmerer | 63°F | 31°F | 1.38 | 1.4 |
| Lovell | 67°F | 42°F | 1.12 | 0.1 |
| Afton | 60°F | 33°F | 2.36 | 0.8 |
| Pinedale | 61°F | 30°F | 1.89 | 2.8 |
| Saratoga | 66°F | 36°F | – | – |
| Greybull | 70°F | 44°F | 1.33 | – |
| Lusk | 64°F | 39°F | – | – |
| Basin | 73°F | 47°F | 1.37 | 0.1 |
| Mountain View | 63°F | 33°F | 1.36 | 3.0 |
| Story | 60°F | 38°F | 4.67 | 4.9 |
| Sundance | 55°F | 38°F | 3.86 | – |
| Pine Bluffs | 69°F | 40°F | 2.71 | – |
| Guernsey | 69°F | 43°F | 2.85 | – |
| Moorcroft | 63°F | 39°F | – | – |
| Dubois | 60°F | 32°F | 1.97 | 4.0 |
| Upton | 65°F | 40°F | 2.83 | 0.7 |
| Dayton | 65°F | 38°F | 3.36 | 1.4 |
| Alta | 60°F | 36°F | 3.01 | 2.5 |
| Shoshoni | 70°F | 42°F | 1.84 | 0.4 |
| Bedford | 61°F | 32°F | 3.08 | – |
| Baggs | 68°F | 36°F | 1.77 | 0.5 |
| Lingle | 69°F | 39°F | 2.68 | – |
| La Barge | 64°F | 33°F | 1.26 | 1.2 |
| Big Piney | 62°F | 29°F | 1.22 | – |
| Centennial | 61°F | 32°F | – | – |
| Hulett | 66°F | 40°F | 3.06 | 1.0 |
| Midwest | 66°F | 38°F | 2.52 | 0.7 |
| Kaycee | 66°F | 39°F | 2.75 | 0.6 |
| Glendo | 67°F | 42°F | 2.81 | – |
| Medicine Bow | 65°F | 33°F | 1.74 | 2.4 |
| Pavillion | 67°F | 40°F | 2.09 | 0.4 |
| Wamsutter | 65°F | 35°F | 1.35 | 2.5 |
| Farson | 64°F | 32°F | 1.47 | 0.4 |
| Deaver | 70°F | 43°F | 1.10 | 0.1 |
| Chugwater | 68°F | 40°F | 3.07 | 2.1 |
| Albin | 68°F | 41°F | 2.95 | 0.9 |
| Daniel | 59°F | 25°F | 1.60 | 2.2 |
| Elk Mountain | 62°F | 36°F | 1.78 | 5.1 |
| Yoder | 72°F | 41°F | 3.24 | 0.1 |
| Clearmont | 65°F | 38°F | – | – |
| Bondurant | 62°F | 33°F | 1.88 | 1.5 |
| Cora | 59°F | 27°F | – | – |
| Shell | 69°F | 39°F | 1.88 | 0.0 |
| Atlantic City | 57°F | 29°F | 2.60 | – |
| Fontenelle | 63°F | 31°F | 1.43 | 0.6 |
| Big Horn | 64°F | 40°F | 3.79 | 2.0 |
| Archer | 67°F | 38°F | 2.83 | 1.7 |
| Bates Creek #2 | 63°F | 38°F | 2.28 | 2.3 |
| Billy Creek | 64°F | 39°F | 2.79 | 1.1 |
| Bitter Creek (4 mi NE) | 65°F | 37°F | 1.22 | – |
| Black Mountain | 63°F | 43°F | 2.73 | 2.4 |
| Boulder | 63°F | 28°F | 1.44 | 1.9 |
| Boysen Dam | 69°F | 43°F | 2.08 | 0.1 |
| Buckboard Marina | 67°F | 37°F | 1.18 | 0.2 |
| Buffalo Bill Dam | 62°F | 40°F | 3.18 | 0.0 |
| Burgess Junction | 50°F | 28°F | 3.50 | – |
| Burris | 64°F | 36°F | 2.12 | 1.5 |
| Carpenter | 68°F | 40°F | 2.42 | 0.8 |
| Church Buttes Gas Plant | 63°F | 37°F | 1.21 | 1.1 |
| Clark (3 mi NE) | 66°F | 40°F | 1.41 | 0.1 |
| Colony | 66°F | 43°F | 2.69 | 0.1 |
| Darwin Ranch | 54°F | 26°F | 1.67 | 5.2 |
| Devils Tower #2 | 66°F | 39°F | 2.93 | 0.4 |
| Dillinger | 66°F | 38°F | 3.09 | 0.6 |
| Diversion Dam | 65°F | 37°F | 2.27 | 1.0 |
| Double Four Ranch | 64°F | 35°F | 2.83 | 2.6 |
| Dull Center (1 mi SE) | 69°F | 41°F | 2.47 | 1.4 |
| Echeta (2 mi NW) | 67°F | 39°F | – | – |
| Emblem | 68°F | 41°F | 1.41 | 0.2 |
| Fossil Butte | 63°F | 30°F | 1.54 | – |
| Heart Mountain | 68°F | 41°F | 1.81 | 0.2 |
| Hecla (1 mi E) | 63°F | 37°F | 2.21 | 4.1 |
| Jeffrey City | 64°F | 35°F | 1.97 | 5.6 |
| La Grange | 72°F | 41°F | 2.24 | 0.3 |
| Lake Yellowstone | 50°F | 29°F | 2.42 | 6.9 |
| Lamar Ranger Station | 60°F | 32°F | 2.22 | – |
| Lance Creek (11 mi NNE) | 67°F | 40°F | 2.74 | 1.8 |
| Leiter (9 mi N) | 67°F | 41°F | 2.71 | 1.2 |
| Leo (6 mi SW) | 69°F | 37°F | 1.85 | 1.3 |
| Moose | 62°F | 33°F | 1.99 | 0.9 |
| Moran (5 mi WNW) | 56°F | 31°F | 2.36 | 2.9 |
| Muddy Gap | 68°F | 39°F | – | – |
| Old Faithful | 55°F | 29°F | 2.68 | 5.4 |
| Old Fort Laramie | 71°F | 41°F | 2.93 | 0.6 |
| Pahaska | 61°F | 29°F | 2.65 | 3.9 |
| Pathfinder Dam | 64°F | 41°F | 1.93 | – |
| Phillips | 69°F | 39°F | 2.82 | 2.4 |
| Powder River | 66°F | 37°F | – | – |
| Powder River (School) | 65°F | 36°F | 2.28 | – |
| Redbird | 70°F | 42°F | 2.63 | 1.3 |
| Rochelle (7 mi ENE) | 66°F | 37°F | 2.46 | – |
| Sage (4 mi NNW) | 66°F | 31°F | – | – |
| Seminoe Reservoir USBR | 62°F | 39°F | 2.14 | – |
| Shirley Basin | 60°F | 32°F | 1.83 | – |
| Snake River | 56°F | 28°F | 2.78 | 5.0 |
| South Pass City | 59°F | 28°F | – | – |
| Sunshine (3 mi NE) | 58°F | 32°F | 2.88 | 6.2 |
| Sybille Research Unit | 63°F | 38°F | 2.54 | 3.5 |
| Tensleep (16 mi SSE) | 65°F | 37°F | 2.31 | 0.9 |
| Tensleep (4 mi NE) | 69°F | 42°F | 2.42 | 1.1 |
| Thermopolis (21 mi WNW) | 66°F | 37°F | – | – |
| Torrington (29 mi N) | 66°F | 40°F | 2.71 | 3.5 |
| Tower Falls | 59°F | 31°F | 1.88 | 2.1 |
| Wapiti (1 mi WSW) | 62°F | 37°F | 1.43 | 0.7 |
| Weston (1 mi E) | 66°F | 39°F | 2.59 | 1.0 |
| Whalen Dam USBR | 69°F | 42°F | 2.70 | – |
| Wright (12 mi W) | 64°F | 38°F | 2.73 | 2.8 |
| Yellowstone Lake | 51°F | 26°F | 2.35 | – |
| Yellowstone National Park E Ent | 57°F | 30°F | 2.56 | – |
| Yellowstone Park Mammoth | 60°F | 35°F | 1.82 | 1.7 |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.