Chicago, IL Weather
Chicago hourly forecast: next 24 hours
Today's high of 79°F (26°C) is right in line with the typical August high of 80°F (26°C).
Current conditions in detail
Chicago weather tomorrow (Friday, August 7)
Tomorrow in Chicago looks patchy rain nearby, with a high of 82° and an overnight low of 68°. There is a 73% chance of rain - plan accordingly. Winds top out near 8 mph, and the UV index reaches 8 (high).
Chicago 14-day forecast
About the weather in Chicago
Weather in Chicago is shaped by its humid continental climate - expect warm summers and cold, often snowy winters. July afternoons typically reach 80°F (27°C), while January highs hover near 32°F (0°C). Annual precipitation averages 46.3 inches (1177 mm) over about 132 rainy days.
Chicago weather: quick facts
- Hottest month: July - highs near 80°F (27°C)
- Coldest month: January - highs near 32°F (0°C)
- Record high: 99°F (37°C) · Record low: -26°F (-32°C) (2015–2024)
- Wettest month: July (12 rainy days) · Sunniest: July (11.8 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 18 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 80°F (27°C) and overnight lows stay near 67°F (19°C). The coolest month is January, with typical highs of 32°F (0°C) and lows around 20°F (-6°C). Based on 2015–2024 weather data, temperatures have reached as high as 99°F (37°C) and dropped as low as -26°F (-32°C).
Rain, sun and snow
July is usually the wettest month. It brings about 6.0 inches (152 mm) of rain over 12 days, while February is the driest. July brings the most sunshine, averaging 11.8 hours of sun a day. Snow falls on about 18 days in a typical year, mostly from November through April.
Season by season
Spring (March through May)
Spring in Chicago stays on the cool side of mild, with daytime highs averaging 55°F (13°C) and nights around 40°F (5°C); expect showers on roughly 38 days across the season, plus around 4 snowy days.
Summer (June through August)
Summer in Chicago brings comfortable warmth, with daytime highs averaging 79°F (26°C) and nights around 65°F (18°C); expect showers on roughly 36 days across the season.
Fall (September through November)
Fall in Chicago stays on the cool side of mild, with daytime highs averaging 62°F (16°C) and nights around 49°F (9°C); expect showers on roughly 30 days across the season.
Winter (December through February)
Winter in Chicago is frigid, with daytime highs averaging 36°F (2°C) and nights around 23°F (-5°C); expect showers on roughly 28 days across the season, plus around 13 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Average temperatures in Chicago by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 32° | 20° | 10 | 2.6 in | 4.9 h/day | 76% |
| February | 36° | 20° | 9 | 2.4 in | 6.8 h/day | 73% |
| March | 45° | 31° | 11 | 3.5 in | 7.9 h/day | 74% |
| April | 54° | 39° | 14 | 4.2 in | 8.8 h/day | 73% |
| May | 66° | 50° | 13 | 5.3 in | 10.1 h/day | 76% |
| June | 77° | 61° | 12 | 4.5 in | 11.6 h/day | 73% |
| July | 80° | 67° | 12 | 6.0 in | 11.8 h/day | 77% |
| August | 80° | 66° | 12 | 4.2 in | 11.5 h/day | 76% |
| September | 75° | 62° | 10 | 3.8 in | 9.6 h/day | 74% |
| October | 62° | 49° | 12 | 4.8 in | 7.5 h/day | 72% |
| November | 48° | 36° | 8 | 2.5 in | 6.0 h/day | 73% |
| December | 39° | 28° | 9 | 2.6 in | 5.0 h/day | 75% |