15-Day Weather Forecast - Chicago
15-day weather forecast for Chicago: temperatures from 14°C (57°F) to 31°C (88°F). Average daily high 24°C (75°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
Chicago's 15-day outlook ranges from a low of 14°C to a high of 31°C, with an average daytime high near 24°C. That's 2° 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. Air quality is currently Moderate (AQI 55), driven mainly by PM2.5 at 12 μg/m³.
Today vs 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.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.
Extended Outlook for Chicago
Over the next 15 days, Chicago is forecast to see temperatures ranging from 13°C to 32°C, averaging a daily high of 24°C. The extended outlook indicates occasional showers on 6 days, with 29.3 mm total accumulation. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.