Wyoming has an average annual temperature of
47.8°F
(across all 2 cities) with approximately
405 mm of annual precipitation
and average humidity of 55%.
The warmest city is Casper
with average July highs of 97.9°F,
while Casper
is the coldest with average January lows of -2.7°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Jul is typically the warmest month across Wyoming with average highs around
96.6°F, while
Jan is the coldest with average lows near
-1.1°F.
May is the wettest month with approximately
65 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
49.8°F
-1.1°F
24.4°F
16
68%
4.8
2.20
Feb
55.2°F
0.1°F
27.7°F
20
64%
4.4
3.20
Mar
65.8°F
11.1°F
38.5°F
31
58%
4.0
4.30
Apr
75.2°F
17.4°F
46.4°F
45
55%
3.7
5.30
May
83.7°F
26.4°F
55°F
65
54%
3.2
6.30
Jun
93°F
38.8°F
65.8°F
48
47%
2.9
7.20
Jul
96.6°F
48.9°F
72.9°F
43
44%
2.6
7.00
Aug
94.3°F
47.3°F
70.9°F
34
44%
2.6
6.20
Sep
89.2°F
32.9°F
61.2°F
33
45%
2.9
5.00
Oct
77°F
19.4°F
48.2°F
34
53%
3.4
3.60
Nov
63.5°F
10.4°F
37°F
21
60%
4.0
2.40
Dec
50.7°F
0.5°F
25.7°F
19
67%
4.5
1.90
📈 Wyoming Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 Wyoming Long-Term Climate Trends (1981–2025)
This chart shows how Wyoming's average temperatures have shifted across 45 years.
Use the range buttons to focus on recent decades or view the full historical record.
Data is averaged across all 2 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in Wyoming
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in Wyoming.
Cheyenne is the wettest city in Wyoming with approximately 429 mm of annual precipitation on average. View Cheyenne weather history →
What is the warmest month in Wyoming?▼
Jul is the warmest month across Wyoming, with state-wide average highs of 96.6°F and average lows of 48.9°F.
How many cities in Wyoming have weather data?▼
TownPillar has historical weather data for 2 cities in Wyoming, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in Wyoming?▼
Jun is the sunniest month across Wyoming with an average solar radiation of 7.20 kWh/m²/day state-wide. This solar radiation data from NASA POWER is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources). Data covers 45 years (1981–2025) across 2 cities in Wyoming at monthly temporal resolution.