Brown County Climate
Brown County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.9°F
Annual Precip
39.4"
Annual Snowfall
13.5"
Extreme Heat Days
—
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Brown County
Climate Verdict
Climate data for Brown County is currently being compiled from NOAA sources. Check back soon for detailed weather normals.
Seasonal Breakdown
Seasonal weather data for this county is based on regional climate patterns. Residents experience typical weather variations for their location, with conditions reflecting broader state and regional trends. Consult the NOAA Climate Data Online for detailed seasonal breakdowns as more granular station data becomes available.
Outdoor & Gardening Guidance
Growing season and gardening guidance for Brown County will be added as data becomes available.
Regional Context
Comparative climate data for Brown County is being processed.
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
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Track your own weather in Brown County
Ambient Weather personal weather stations give you hyperlocal climate data.
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Data sources: ERA5 Reanalysis (modeled) via Open-Meteo (gap-filled where station data unavailable).. 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.