Olmsted County Climate
Olmsted County, Minnesota
Avg Annual Temp
44.0°F
Annual Precip
35.2"
Annual Snowfall
49.9"
Extreme Heat Days
6.45
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Olmsted County Weather
Cool-Temperate Southeast Minnesota Hub
Olmsted's 44.0°F average temperature reflects a cool-temperate climate far below the national median. It experiences a wide range of weather common to the upper Mississippi Valley.
Warmer Than the State Median
This county is warmer than the state average of 42.8°F. It benefits from a slightly more temperate southern latitude compared to the rest of Minnesota.
Higher Precipitation Than Western Neighbors
Olmsted is significantly wetter than average, receiving 35.2 inches of annual precipitation. It sees nearly 50 inches of snow, surpassing southern neighbor Nobles.
Mild Summers and Snowy Winters
Summer is mild with only 6 days of extreme heat over 90°F. Winter is cold but manageable, with a 17.3°F average from December through February.
Managing High Rainfall and Snow
Prioritize waterproofing and gutter maintenance to handle the high 35.2-inch rainfall. Ensure snowblowers are tuned for the nearly 50 inches of annual snowfall.
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.