Brown County Climate
Brown County, Illinois
Climate data coming soon
Avg Annual Temp
—
Annual Precip
39.4"
Annual Snowfall
13.5"
Extreme Heat Days
—
Monthly Temperature
Temperature data coming soon
Precipitation Calendar
Seasonal Overview
Seasonal data coming soon
National Comparison
Data pending
Data pending
Climate Profile
About Brown County Weather
Moderate Rainfall and Typical Seasons
Brown County averages 39.4 inches of precipitation annually, placing it slightly below the national median. This level of moisture supports a standard continental climate with four distinct seasonal transitions.
Drier than the Illinois Average
The county receives 39.4 inches of rain, which is about 2.3 inches less than the Illinois state average. Its 13.5 inches of annual snow is also significantly lower than the northern state average.
Milder Winters than Bureau County
Brown County's 13.5 inches of snow is much more manageable than the 32.2 inches recorded in Bureau County. It enjoys a drier profile overall, with precipitation staying under 40 inches annually.
Light Snow and Regular Rainfall
The 13.5 inches of annual snow makes for relatively mild winters compared to the state's northern tier. Without local temperature data, residents rely on the 39.4 inches of annual precipitation for seasonal agricultural planning.
Standard Midwest Seasonal Prep
Prepare for moderate winters with basic snow clearing tools for the 13.5 inches of expected snowfall. Summer gardens may require supplemental watering since the 39.4 inches of rain falls below the state average.
Frequently Asked Questions
How much rain does Brown County get?
Does it snow in Brown County?
Track your own weather in Brown 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.