Chesterfield, MO Weather & Climate Normals
Chesterfield's real weather, in one number
Chesterfield, MO scores 49/100 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.
Chesterfield's hottest and coldest months
Chesterfield's hottest month is Jul, averaging 79°F; its coldest is Jan, averaging 32°F, a 47.3°F swing across the year, one of the widest gaps in this dataset.
Rain and snow in Chesterfield
Over a typical year, Chesterfield sees about 39.75in of precipitation a year across roughly 116 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where Chesterfield ranks
Chesterfield ranks 2059 of 4876 US cities in this dataset for comfort score, and 11 of 135 within MO. About 49,465 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from ST LOUIS SPRT OF S L AP, MO US, 4.3 miles from Chesterfield, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · How the comfort score is calculated