Today's Weather Forecast - Chicago

Today's weather in Chicago. high 25°C (77°F), low 16°C (61°F). Sunny.

Today’s Hourly Weather Outlook

Morning6 AM – Noon19°
Wind speed
11 km/h
Rain probability
0%
AfternoonNoon – 6 PM25°
Wind speed
15 km/h
Rain probability
0%
Evening6 PM – Midn21°
Wind speed
14 km/h
Rain probability
0%
NightMidn – 6 AM17°
Wind speed
10 km/h
Rain probability
0%

24-Hour Rain & Temperature Forecast

Sunrise & Sunset

Sunrise
Dawn 5:56 AM
Total Daylight
27% of day elapsedSolar noon 12:46 PM
Sunset
Dusk 7:36 PM
Remaining9h 12m
Solar elevation36°
vs yesterday-4 min

Air Quality Index & Health Advice

Air Quality Index

Air quality level
Good
Dominant pollutant
Dominant: PM2.5
Monitoring station
Chi_sp, Illinois, USA
PM2.5
48μg/m³
0Good → Hazardous300+

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Chicago is forecast to reach a high of 25°C today, with an overnight low around 16°C. That's 3° above the long-term average high of 22°C for this time of year. It continues a recent pattern — 21 of the last 28 days with published data have run warmer than normal. Expect little chance of rain (0% probability) and a gentle breeze averaging 15 km/h. Air quality is currently good (AQI 31), with no notable outdoor health concerns.

Today vs Normal

25°C+3° above normal

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

21 of the last 28 days with published data ran above normal.

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

2026-08-28: 26°C26°2026-08-29: 25°C25°2026-08-30: 26°C26°2026-08-31: 28°C28°2026-09-01: 30°C30°2026-09-02: 30°C30°2026-09-03: 30°C30°2026-09-04: 29°C29°2026-09-05: 25°C25°2026-09-06: 23°C23°2026-09-07: 24°C24°2026-09-08: 26°C26°

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

Air Quality

Air Quality
Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.