Franklin County Climate
Franklin County, Idaho
Avg Annual Temp
47.0°F
Annual Precip
17.3"
Annual Snowfall
52.4"
Extreme Heat Days
33.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Franklin County Weather
A Classic Four-Season Intermountain Climate
Franklin County averages 47.0°F annually, leaning cooler than the national median. It offers a balanced climate with distinct seasonal shifts and moderate precipitation.
Consistent With the Idaho State Average
The county's annual average of 47.0°F is nearly identical to the Idaho state average of 46.5°F. Its 17.3 inches of precipitation also mirrors the statewide norm of 17.0 inches almost perfectly.
Milder Than the High Cold Deserts
Franklin is notably warmer and wetter than Clark County, which averages only 45.3°F and 12.2 inches of rain. This makes it a more moderate option compared to its neighbors to the north.
Snowy Winters and Sunny Summer Days
The county sees a substantial 52.4 inches of snowfall each year with January lows averaging 23.8°F. Summers are warm but comfortable, featuring a July average of 71.4°F and 34 days of extreme heat.
Balance Snow Prep with Heat Relief
Homeowners should prepare for over four feet of annual snow with reliable shovels or blowers. Cooling systems are also necessary to manage the month's worth of days that exceed 90°F.
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.