Big Horn County Climate
Big Horn County, Wyoming
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
45.8°F
Annual Precip
7.1"
Annual Snowfall
18.6"
Extreme Heat Days
41
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,479
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Big Horn County
Climate Verdict
Big Horn County has a cool, averaging 45.8°F annually, arid conditions receiving just 7.1 inches of precipitation annually, occasional hot days — 40.81428571428571 per year above 90°F, light snow averaging 18.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 18.7°F. summers are warm — July averages 73.0°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Big Horn County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Big Horn County closely matches the Wyoming statewide average temperature of 43.8°F, it is also noticeably drier, receiving 6.7 inches less precipitation than the state average, the county experiences 17.454390030259592 more extreme heat days than the state average.
Climate Profile
About Big Horn County Weather
A High Desert Climate with Low Rainfall
With an annual average of 45.8°F, Big Horn County is cooler than the national median but maintains an arid profile. It receives just 7.1 inches of precipitation annually, making it one of the driest counties in the country.
Warmer than the Typical Wyoming Average
At 45.8°F, Big Horn stays warmer than the state average of 43.8°F. However, its 7.1 inches of rainfall is nearly 50% lower than the state's typical 13.9 inches.
Drier than Neighboring Fremont County
Big Horn is significantly more arid than nearby Fremont County, receiving about 3.3 inches less precipitation per year. It is also warmer on average, exceeding Fremont's annual temperature by over 2 degrees.
Hot Summers and Very Dry Winters
Summers are intense with 41 days reaching 90°F or higher and a July average of 73.0°F. Conversely, winter snowfall is relatively light at just 18.6 inches per year.
Prioritize Air Conditioning and Water Conservation
Reliable air conditioning is vital for the 41 annual extreme heat days. Homeowners should also focus on xeriscaping and drought-resistant landscaping due to the extremely low 7.1-inch annual precipitation.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.