Payette County Climate
Payette County, Idaho
Avg Annual Temp
53.2°F
Annual Precip
11.3"
Annual Snowfall
—
Extreme Heat Days
54.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Payette County Weather
Sun-Drenched and Arid Valley
Payette's 53.2°F average temperature makes it a warm outlier compared to the national median. It receives just 11.3 inches of precipitation, characterizing it as a dry, sun-drenched valley.
One of Idaho's Hottest Counties
This is one of Idaho’s hottest counties, topping the state average of 46.5°F by nearly seven degrees. It consistently ranks in the top tier for temperature and heat frequency statewide.
Treasure Valley Heat Leader
It shares the heat of the Treasure Valley with Canyon County but remains drier than the state average. Its low elevation keeps it much warmer than the central Idaho mountains.
Intense Summer Heat Waves
The county endures a grueling 54 days of extreme heat over 90°F each year. July averages a sweltering 76.4°F, while winters remain relatively mild with a 33.8°F average.
Invest in High-Performance Cooling
Robust cooling systems are a necessity for the nearly two months of 90-degree weather. While snowfall data is incomplete, focus winter prep on the chilly 31.5°F January average.
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.