Lyon County Climate
Lyon County, Minnesota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
44.9°F
Annual Precip
28.1"
Annual Snowfall
45.8"
Extreme Heat Days
15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,703
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Lyon County
Climate Verdict
Lyon County has a cool, averaging 44.9°F annually, moderate rainfall of 28.1 inches per year, rare extreme heat with only 15.05 days above 90°F annually, moderate snowfall of 45.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 14.1°F. summers are warm — July averages 72.4°F. Residents experience a substantial 58°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Lyon County closely matches the Minnesota statewide average temperature of 42.8°F.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. 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.