Green County Climate
Green County, Wisconsin
Avg Annual Temp
47.3°F
Annual Precip
39.0"
Annual Snowfall
39.4"
Extreme Heat Days
13.95
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Green County Weather
Approaching the National Median
Green County is one of Wisconsin's warmest spots, with an annual average temperature of 47.3°F. It still sits below the national median but experiences a more moderate climate than the rest of the state.
Warmest in the State
The county’s 47.3°F average significantly exceeds the Wisconsin state average of 44.4°F. It also receives nearly 5 inches more precipitation than the state average, totaling 39.0 inches annually.
Higher Precipitation Levels
Green County receives 39.0 inches of precipitation, which is higher than neighboring Grant County's 37.5 inches. Its snowfall of 39.4 inches is almost identical to Grant, indicating similar winter moisture.
Hot Summers and Brisk Winters
Residents face 14 days of extreme heat above 90°F, the highest in this regional set. Summers average 70.5°F, while winters stay relatively mild for Wisconsin at 22.1°F.
Prioritize Summer Cooling
Because of the 14 days of extreme heat, efficient HVAC systems are a primary concern for residents. While the 18.9°F January average is warmer than northern counties, winter gear remains necessary for the 39 inches of snow.
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.