Yellowstone County Climate
Yellowstone County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
46.7°F
Annual Precip
14.7"
Annual Snowfall
44.2"
Extreme Heat Days
37
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,353
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Yellowstone County
Climate Verdict
Yellowstone County has a cool, averaging 46.7°F annually, arid conditions receiving just 14.7 inches of precipitation annually, occasional hot days — 37 per year above 90°F, moderate snowfall of 44.2 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.8°F. summers are warm — July averages 71.6°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Yellowstone County is 3.1°F warmer than the Montana statewide average of 43.7°F, the county experiences 15.335454931972787 more extreme heat days than the state average.
Climate Profile
About Yellowstone County Weather
Montana's warm, urban corridor
Yellowstone County averages 46.7°F annually, one of the highest in the state but still below the national median. The area is relatively dry, recording 14.7 inches of annual precipitation.
One of Montana's warmest regions
The county's 46.7°F average is three degrees warmer than the state average of 43.7°F. This warmth is most apparent in the summer, when the county records 37 days of extreme heat.
Heat leader of the region
Yellowstone County experiences 37 days over 90°F, far exceeding the 15 days seen in neighboring Wheatland. Its 44.2 inches of snowfall is moderate, providing a milder winter experience than the high mountains to the west.
Long summers and moderate winters
July is hot with an average of 71.6°F, and the summer season overall averages 68.4°F. Winter remains cold with a 26.1°F average, though it is significantly warmer than the state's northern border counties.
Focus on summer cooling
Because of the 37 days of extreme heat, central air conditioning is a standard requirement for comfort here. While winter is milder than elsewhere in Montana, residents still need to prepare for 44.2 inches of snow and January lows averaging 24.8°F.
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.