Bartlett, IL Weather & Climate Normals
What a normal year in Bartlett actually looks like
On the 30-year record NOAA keeps for Bartlett, IL, the comfort score comes out to 44/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Bartlett's weather actually swings
Average temperatures in Bartlett run from 23°F in Jan up to 74°F in Jul, a 51.2°F seasonal swing, one of the widest gaps in this dataset.
How wet Bartlett actually gets
Over a typical year, Bartlett sees about 38.02in of precipitation a year across roughly 129 days with measurable rain or snow, with 34in of snow a year.
Bartlett against the rest of the country
Out of 4876 cities scored here, Bartlett comes in at 3703; within IL alone it ranks 170 of 330. Population is about 40,718.
Checking the actual forecast
These figures come from STREAMWOOD, IL US, the NOAA station 4.5 miles from Bartlett, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is