Weather in Chicago in september
Climate normals based on 10 years of historical data for Chicago, USA.
Average high
24°C
Average low
17°C
Rainfall
111 mm
10 rainy days
Sunshine
4.7h/day
Niiskus
68%
How Hot Is Chicago in september?
September keeps Chicago warm but with noticeable cooling at night: 24°C peaks, 17°C lows.
Sunshine Hours in september
Chicago's September averages 4.7h of direct sun — cloud cover varies day to day.
Does It Rain In Chicago In september?
Intense rain on a few days: 111mm in 10 days in Chicago.
Is Chicago Humid In september?
Sticky conditions in Chicago: humidity sits at 68% across September.
Wind In Chicago In september
Wind picks up in Chicago during September — averaging 21 kph, with gustier afternoons.
Cloud Cover In Chicago In september
Chicago's September runs cloudy: typical cloud cover of 53%.
Cities With Similar Weather In september
Weather in Chicago, month by month
| Month | High / Low | Vihm | |
|---|---|---|---|
| Jaanuari ilm | 0°C / -6°C | 67mm | Details → |
| Veebruari ilm | 1°C / -5°C | 65mm | Details → |
| Märtsi ilm | 7°C / 0°C | 97mm | Details → |
| Aprilli ilm | 12°C / 5°C | 116mm | Details → |
| Mai ilm | 18°C / 11°C | 152mm | Details → |
| Juuni ilm | 24°C / 17°C | 134mm | Details → |
| Juuli ilm | 26°C / 20°C | 170mm | Details → |
| Augusti ilm | 26°C / 20°C | 121mm | Details → |
| Septembri ilm | 24°C / 17°C | 111mm | |
| Oktoobri ilm | 17°C / 10°C | 136mm | Details → |
| Novembri ilm | 9°C / 3°C | 72mm | Details → |
| Detsembri ilm | 4°C / -2°C | 73mm | Details → |