Franklin County Climate
Franklin County, Washington
Avg Annual Temp
52.2°F
Annual Precip
9.5"
Annual Snowfall
13.5"
Extreme Heat Days
37.475
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Franklin County Weather
Arid Heat in the Basin
Franklin County averages 52.2°F, placing it closer to the national median than many of its northern neighbors. Its arid climate is defined by sparse rainfall, totaling just 9.5 inches annually.
Warmer and Drier Than Washington
It is one of the warmer spots in Washington, exceeding the state average of 49.9°F by over two degrees. It receives only a fraction of the state's 38.5-inch average precipitation, making it exceptionally dry.
Driest in the Region
Franklin is warmer and drier than neighboring Garfield County, which averages 49.8°F. While Garfield sees 17.6 inches of rain, Franklin struggles to reach even 10 inches.
Intense Heat and Low Snow
Summer heat is intense here, with 37 days reaching 90°F or higher and a July average of 73.0°F. Winters are relatively mild for the region, seeing 13.5 inches of snow and a 34.7°F average.
Managing the Summer Sizzle
Irrigation is vital for any landscaping due to the extremely low 9.5 inches of annual rain. Homeowners should prioritize cooling systems to manage the frequent extreme heat days during the peak of summer.
Frequently Asked Questions
What is the average temperature in Franklin County?
How much rain does Franklin County get?
Does it snow in Franklin County?
How hot does Franklin County get in summer?
How cold are winters in Franklin County?
Track your own weather in Franklin County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.