Posen, IL Weather & Climate Normals
Posen's real weather, in one number
Posen, IL scores 43/100 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.
Posen's hottest and coldest months
Posen's hottest month is Jul, averaging 77°F; its coldest is Jan, averaging 26°F, a 50.5°F swing across the year, one of the widest gaps in this dataset.
Rain and snow in Posen
Posen averages 40.88in of precipitation a year across roughly 127 days with measurable rain or snow, and 38.8in of snow a year.
Where Posen ranks
Posen ranks 4134 of 4876 US cities in this dataset for comfort score, and 279 of 330 within IL. About 5,413 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from CHICAGO MIDWAY AP 3SW, IL US, 8.8 miles from Posen, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station