Franklin County Climate
Franklin County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.0°F
Annual Precip
17.3"
Annual Snowfall
52.4"
Extreme Heat Days
34
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,280
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Franklin County
Climate Verdict
Franklin County has a cool, averaging 47.0°F annually, semi-arid conditions with only 17.3 inches of annual precipitation, occasional hot days — 33.9 per year above 90°F, moderate snowfall of 52.4 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.8°F. summers are warm — July averages 71.4°F. The 48°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
Franklin County closely matches the Idaho statewide average temperature of 46.5°F.
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 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.