Natrona County Climate
Natrona County, Wyoming
Avg Annual Temp
45.7°F
Annual Precip
13.1"
Annual Snowfall
62.2"
Extreme Heat Days
28.185714285714287
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Natrona County Weather
A Dry and Windy Interior
Natrona County averages 45.7°F annually, staying well below the national median in a semi-arid climate. It receives just 13.1 inches of annual precipitation, making it one of the drier populated regions in the country.
Warmer than the State Baseline
With an average of 45.7°F, Natrona is nearly two degrees warmer than the 43.8°F Wyoming average. This puts Casper and the surrounding areas in the more temperate bracket of the state.
The Center of the State
Natrona County is slightly warmer than Johnson County (45.1°F) to the north. Its precipitation levels are very similar to neighboring Hot Springs County, which receives 13.3 inches of moisture.
Heavy Snow and Summer Peaks
The county sees a significant 62.2 inches of annual snowfall, one of the higher totals in the region. Summers bring 28 days of extreme heat, with July temperatures averaging a warm 70.9°F.
Manage the Snow Load
Property owners must be prepared for the heavy 62.2-inch annual snow accumulation and cold 24.7°F January lows. Air conditioning is also necessary for the nearly one month of extreme 90-degree summer days.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.