Tomorrow's Weather Forecast - Chicago

Tomorrow's weather in Chicago. high 25°C (77°F), low 15°C (59°F). Overcast.

Tomorrow’s Outlook

Tomorrow will be 2°C warmer than today. Expect pleasant, mostly clear skies with little chance of rain. Humidity stays high near 71%, so it will feel muggier and stickier than the temperature alone suggests. A light breeze near 16 km/h is expected. Sunrise is at 6:26 AM and sunset at 7:06 PM, for about 12h 40m of daylight.

Tomorrow
25°/ 15°
Today23° / 19°

Tomorrow’s Hourly Weather Outlook

Morning6 AM – Noon18°
Rain probability
0%
Wind speed
9 km/h
AfternoonNoon – 6 PM25°
Rain probability
0%
Wind speed
16 km/h
Evening6 PM – Midn22°
Rain probability
0%
Wind speed
13 km/h
NightMidn – 6 AM17°
Rain probability
0%
Wind speed
10 km/h

24-Hour Rain & Temperature Forecast

Tomorrow11 Sep
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Temperature · peaks at +25°C

Planning Advice for Tomorrow

Clothing
Light layers work well; a jacket for the evening.
Outdoor
Good conditions for outdoor activities.
Travel
Standard travel conditions expected.

Sunrise & Sunset

Sunrise
Dawn 5:56 AM
Total Daylight
Full day forecastSolar noon 12:46 PM
Sunset
Dusk 7:36 PM
vs today-3 min daylight
Sunrise shift1 min later
Sunset shift2 min earlier

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Chicago is forecast to reach a high of 25°C tomorrow, with an overnight low around 15°C. That's 3° above the long-term average high of 22°C for this time of year. It continues a recent pattern — 12 of the last 20 days with published data have run warmer than normal. Expect little chance of rain (0% probability) and a gentle breeze averaging 16 km/h. Air quality is currently Moderate (AQI 55), driven mainly by PM2.5 at 12 μg/m³.

Today vs Normal

23°C+1° above normal

The long-term average high for today is 22°C.

12 of the last 20 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

2026-08-19: 24°C24°2026-08-20: 24°C24°2026-08-21: 25°C25°2026-08-22: 25°C25°2026-08-23: 23°C23°2026-08-24: 24°C24°2026-08-25: 25°C25°2026-08-26: 26°C26°2026-08-27: 25°C25°2026-08-28: 26°C26°2026-08-29: 25°C25°2026-08-30: 26°C26°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.