Cheyenne Climate by Month
Cheyenne, Wyoming, United States
Warm summers and cold winters, with little rain.
Cheyenne has warm summers and cold winters, with little rain. July is the warmest month, with highs around 84°F (29°C); December is the coolest at 40°F (4°C), and nights dip to 17°F (-8°C). It gets only 13 in (342 mm) of rain a year.
- Warmest month
- 84°F(29°C)
- Average high, July
- Coldest nights
- 17°F(-8°C)
- Average low, December
- Rain per year
- 13 in(342 mm)
- No clear rainy season
- Humidity
- 50%
- Sunniest: July
Best and worst months in Cheyenne
Best for weatherJune and September are the best time for weather in Cheyenne: highs near 75°F (24°C) and about 1.6 in (40 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; December is the coldest, with highs of only 40°F (4°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Cheyenne weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 41°F(5°C) | 18°F(-8°C) | 0.3 in(8 mm) | 55% | 2.2 |
| FebFebruary | 42°F(5°C) | 18°F(-8°C) | 0.4 in(10 mm) | 54% | 3.0 |
| MarMarch | 49°F(10°C) | 24°F(-4°C) | 0.9 in(24 mm) | 54% | 4.4 |
| AprApril | 56°F(13°C) | 30°F(-1°C) | 1.4 in(35 mm) | 53% | 5.1 |
| MayMay | 65°F(19°C) | 39°F(4°C) | 2.3 in(59 mm) | 52% | 6.1 |
| JunJuneBest | 77°F(25°C) | 48°F(9°C) | 1.9 in(49 mm) | 46% | 6.8 |
| JulJuly | 84°F(29°C) | 55°F(13°C) | 1.8 in(45 mm) | 45% | 6.9 |
| AugAugust | 82°F(28°C) | 53°F(12°C) | 1.5 in(37 mm) | 43% | 6.0 |
| SepSeptemberBest | 74°F(23°C) | 45°F(7°C) | 1.2 in(31 mm) | 47% | 5.0 |
| OctOctober | 60°F(15°C) | 33°F(1°C) | 0.8 in(21 mm) | 47% | 3.4 |
| NovNovember | 48°F(9°C) | 23°F(-5°C) | 0.5 in(13 mm) | 43% | 2.3 |
| DecDecember | 40°F(4°C) | 17°F(-8°C) | 0.4 in(10 mm) | 57% | 1.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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