Nez Perce County Climate
Nez Perce County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.8°F
Annual Precip
12.9"
Annual Snowfall
12.7"
Extreme Heat Days
44
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
3,143
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Nez Perce County
Climate Verdict
Nez Perce County has a mild, with an average annual temperature of 53.8°F, arid conditions receiving just 12.9 inches of precipitation annually, occasional hot days — 44.1 per year above 90°F, light snow averaging 12.7 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 36.2°F. summers are warm — July averages 75.8°F. The 40°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Nez Perce County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Nez Perce County is 7.3°F warmer than the Idaho statewide average of 46.5°F, it is somewhat drier than average for Idaho.
Climate Profile
About Nez Perce County Weather
A Warm Interior Northwest Hub
With an average of 53.8°F, Nez Perce is one of the warmest spots in the Pacific Northwest interior. Its dry climate yields only 12.9 inches of annual precipitation.
Idaho's Famous Banana Belt
This is one of Idaho's warmest counties, far exceeding the state average of 46.5°F. The local geography keeps the Lewiston area significantly milder than the rest of the state.
Warmer and Drier Than Neighbors
It is much warmer than surrounding mountain counties like Clearwater and Shoshone. While it stays dry, its 12.7 inches of snow is minimal compared to its high-altitude neighbors.
Intense Heat and Mild Winters
Summers are intense with 44 days reaching 90°F and a July average of 75.8°F. Winters are the mildest in the state, averaging a relatively warm 36.9°F.
Cooling is the Top Priority
Modern air conditioning is essential to navigate the frequent 90-degree summer days. Light winter layers usually suffice as January averages stay well above freezing at 36.2°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.