Lyon County Climate
Lyon County, Minnesota
Avg Annual Temp
44.9°F
Annual Precip
28.1"
Annual Snowfall
45.8"
Extreme Heat Days
15.05
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Lyon County Weather
Warmer and drier than average
Lyon County averages 44.9°F annually, roughly 9 degrees below the national median but on the warmer side for the region. It sees 28.1 inches of precipitation, making it slightly drier than the national average.
One of Minnesota's warmer spots
The county's 44.9°F average temperature is over two degrees higher than the state average of 42.8°F. It sits in a pocket of southern Minnesota that experiences slightly more heat than the rest of the state.
Snowier than its southern neighbors
Lyon County records 45.8 inches of snow, which is more than the 39.1 inches seen in Le Sueur. Its total precipitation of 28.1 inches is very similar to Lac qui Parle to the north.
Hot summers and cold winters
Summer heat is notable here, with 15 days reaching 90°F or more and a July average of 72.4°F. Winters are still sharp, with a January average of 14.1°F and a winter-wide average of 17.4°F.
Prepare for significant summer heat
With 15 extreme heat days, efficient air conditioning is a high priority for local residents. The 45.8 inches of snow also requires a reliable snowblower, as winter averages remain well below freezing.
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.