Lake St. Louis, MO Weather & Climate Normals
Lake St. Louis's real weather, in one number
Lake St. Louis, MO scores 48/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Lake St. Louis's hottest and coldest months
Lake St. Louis's hottest month is Jul, averaging 77°F; its coldest is Jan, averaging 30°F, a 47.1°F swing across the year, one of the widest gaps in this dataset.
Rain and snow in Lake St. Louis
Lake St. Louis averages 44.42in of precipitation a year across roughly 107 days with measurable rain or snow, and 13.5in of snow a year.
Where Lake St. Louis ranks
Lake St. Louis ranks 2368 of 4876 US cities in this dataset for comfort score, and 43 of 135 within MO. About 19,160 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from WELDON SPRING NWS, MO US, 7.9 miles from Lake St. Louis, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure