Twin Falls County Climate
Twin Falls County, Idaho
Avg Annual Temp
49.6°F
Annual Precip
10.2"
Annual Snowfall
24.2"
Extreme Heat Days
35.28
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Twin Falls County Weather
A Classic High Desert Climate
Twin Falls averages 49.6°F annually, which is roughly four degrees cooler than the national median. The region features the dry air and clear skies typical of the Intermountain West.
Warmer Than the Idaho Average
At 49.6°F, this county is warmer than the Idaho state average of 46.5°F. It ranks as a relatively temperate zone compared to the state's mountainous northern reaches.
Dry Skies Over the Magic Valley
The county receives only 10.2 inches of annual precipitation, far less than the Idaho average of 17.0 inches. This aridity distinguishes it from the wetter counties in the panhandle.
Hot Summers and Snowy Winters
Summer brings 35 days of heat at or above 90°F, centered around a 72.8°F July average. Winter stays cold enough for 24.2 inches of annual snowfall.
Plan for Aridity and Heat
Efficient air conditioning is vital for the five weeks of extreme summer heat. Gardeners should prioritize xeriscaping to manage the low 10.2-inch annual rainfall.
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.