Valley County Climate
Valley County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
43.1°F
Annual Precip
22.1"
Annual Snowfall
83.2"
Extreme Heat Days
17
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
1,527
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Valley County
Climate Verdict
Valley County has a cool, averaging 43.1°F annually, semi-arid conditions with only 22.1 inches of annual precipitation, rare extreme heat with only 17.42 days above 90°F annually, heavy winter snowfall averaging 83.2 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.0°F. summers are pleasantly cool with July averaging 65.6°F. The 43°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
Valley County is 3.4°F cooler than the Idaho statewide average of 46.5°F, it is also noticeably wetter, receiving 5.1 inches more precipitation than the state average.
Climate Profile
About Valley County Weather
An Alpine Escape
Valley County averages 43.1°F annually, trailing the national median by over 10 degrees. Its climate is defined by high elevations and significant mountain influence.
Cooler and Wetter Than Average
The county's 43.1°F average is lower than the Idaho state mean of 46.5°F. It is one of the state's moisture magnets, receiving 22.1 inches of precipitation annually.
Heavy Snow Compared to Neighbors
With 83.2 inches of annual snow, Valley is much whiter in winter than the lower-elevation Snake River Plain. It exceeds the state precipitation average by over five inches.
Deep Snow and Pleasant Summers
Winter is dominated by nearly seven feet of snow and a 24.3°F average. Summers are brief but warm, with 17 days hitting 90°F and a July mean of 65.6°F.
Invest in Snow Removal
Heavy-duty snow blowers are essential to manage the 83.2 inches of yearly accumulation. Homeowners should also ensure roofs are rated for significant snow loads.
Frequently Asked Questions
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Track your own weather in Valley County
Ambient Weather personal weather stations give you hyperlocal climate data.
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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.