Fulton County Climate
Fulton County, Illinois
Avg Annual Temp
49.3°F
Annual Precip
38.6"
Annual Snowfall
19.2"
Extreme Heat Days
16.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Fulton County Weather
Colder Than the National Median
Fulton County's 49.3°F annual average temperature is several degrees below the national median. It experiences a rigorous continental climate with substantial seasonal variation.
Chilly Rank Among Illinois Counties
Averaging 49.3°F, Fulton is one of the cooler counties in Illinois, sitting well below the 52.8°F state average. Its northern-latitude weather patterns bring sharper winters.
Drier and Cooler Than Neighbors
The county receives 38.6 inches of rain annually, which is below the Illinois state average of 41.7 inches. It is notably drier than counties to its south and east.
Cold Winters and Managed Heat
January temperatures average a cold 21.9°F, accompanied by 19.2 inches of annual snowfall. Extreme heat is less frequent here, with only 16 days reaching 90°F or more.
Focus on Winter Home Prep
Winterization is the priority here, as January lows require reliable heating systems and pipe protection. Outdoor recreation is best planned for the mild 71.3°F summer 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.