West Chicago, IL Weather & Climate Normals
What a normal year in West Chicago actually looks like
On the 30-year record NOAA keeps for West Chicago, IL, the comfort score comes out to 48/100, 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 West Chicago's weather actually swings
Average temperatures in West Chicago run from 23°F in Jan up to 74°F in Jul, a 50.4°F seasonal swing, one of the widest gaps in this dataset.
West Chicago, month by month
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 31°F | 16°F | 1.27in |
| Feb | 35°F | 19°F | 1.24in |
| Mar | 47°F | 28°F | 1.97in |
| Apr | 60°F | 38°F | 3.44in |
| May | 71°F | 49°F | 4.34in |
| Jun | 81°F | 59°F | 3.65in |
| Jul | 84°F | 63°F | 3.62in |
| Aug | 82°F | 62°F | 3.84in |
| Sep | 76°F | 54°F | 3in |
| Oct | 62°F | 42°F | 2.99in |
| Nov | 48°F | 31°F | 2.2in |
| Dec | 35°F | 21°F | 1.67in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are West Chicago's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet West Chicago actually gets
West Chicago averages 33.23in of precipitation a year across roughly 121 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
West Chicago against the rest of the country
Out of 4876 cities scored here, West Chicago comes in at 2348; within IL alone it ranks 43 of 330. Population is about 25,469.
Checking the actual forecast
These figures come from West Chicago Dupage Ap, IL US, the NOAA station 1.9 miles from West Chicago, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · Why this uses the nearest NOAA station