Weather for Chicago, Illinois
Current Weather
70.7°F
Mist
70.7°F
75.7°F
76%
NNE 8.3 mph
12.9 mph
70°F
64.3°F
0 in
0%
3 mi
1015 mbar
0
Five Day Weather Forecast
Sun
H: 78°F
L: 68°F
Mon
H: 83°F
L: 64°F
Tue
H: 85°F
L: 70°F
Wed
H: 71°F
L: 64°F
Thu
H: 78°F
L: 60°F
Air Quality
AQI:
1 - Good
PM2.5:
27.7 μg/m3
PM10:
28.1 μg/m3
Carbon Monoxide: 252 μg/m3
Nitrogen Dioxide: 5.8 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 116 μg/m3
Nitrogen Dioxide: 5.8 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 116 μg/m3
Astronomical
Sunrise: 5:32 AM
Sun Transit: 12:56 AM
Sunset: 8:20 PM
Daylight: 14 hrs 48 mins
Sun Transit: 12:56 AM
Sunset: 8:20 PM
Daylight: 14 hrs 48 mins
Moonrise: 11:38 AM
Moon Transit: 5:28 PM
Moonset: 11:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%
Moon Transit: 5:28 PM
Moonset: 11:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%
Best Times for Fishing or Hunting
Major Periods
4:57 AM - 7:27 AM4:58 PM - 7:28 PM
Minor Periods
12:00 AM - 12:00 AM11:08 AM - 12:38 AM
Action Rating: 2 out of 5
Air Quality Alert issued July 18 at 12:13AM CDT by NWS Chicago IL
Effective: Sat July 18, 2026, 12:13 AM
Expires: Sun July 19, 2026, 12:15 AM
The officials at the Indiana Department of Environmental Management have declared an Air Quality Action Day, in effect until midnight CDT Monday night. An Air Quality Action Day for ozone and PM 2.5 has been issued. A combination of fine particulate and ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure. Due to observed and forecasted high concentrations of PM2.5 readings in the area, recommendations are for the public to avoid or limit outdoor exposure to wildfire smoke, reduce or avoid exertion or heavy work outdoors and keep windows and doors closed as much as possible. For additional information, please visit the IDEM Smog page at: http://www.in.gov/idem/airmonitoring/smogwatch/
Sunday, July 19, 2026
Weather Forecast
Sunny
78.4°F
68°F
72.5°F
68%
0 in
6%
0%
8.9 mph
6.5
Air Quality
AQI:
2 - Moderate
PM2.5:
31.68 μg/m3
PM10:
32.13 μg/m3
Carbon Monoxide: 229.88 μg/m3
Nitrogen Dioxide: 6.45 μg/m3
Sulphur Dioxide: 2.57 μg/m3
Ozone: 109.54 μg/m3
Nitrogen Dioxide: 6.45 μg/m3
Sulphur Dioxide: 2.57 μg/m3
Ozone: 109.54 μg/m3
Astronomical
Sunrise: 5:32 AM
Sun Transit: 12:56 AM
Sunset: 8:20 PM
Daylight: 14 hrs 48 mins
Sun Transit: 12:56 AM
Sunset: 8:20 PM
Daylight: 14 hrs 48 mins
Moonrise: 11:38 AM
Moon Transit: 5:28 PM
Moonset: 11:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%
Moon Transit: 5:28 PM
Moonset: 11:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%
Best Times for Fishing or Hunting
Major Periods
4:57 AM - 7:27 AM4:58 PM - 7:28 PM
Minor Periods
12:00 AM - 12:00 AM11:08 AM - 12:38 AM
Action Rating: 2 out of 5
Monday, July 20, 2026
Weather Forecast
Sunny
82.6°F
64°F
74°F
70%
0.12 in
57%
0%
12.5 mph
4.8
Air Quality
AQI:
2 - Moderate
PM2.5:
22.6 μg/m3
PM10:
22.85 μg/m3
Carbon Monoxide: 280.5 μg/m3
Nitrogen Dioxide: 14.54 μg/m3
Sulphur Dioxide: 4.6 μg/m3
Ozone: 94.08 μg/m3
Nitrogen Dioxide: 14.54 μg/m3
Sulphur Dioxide: 4.6 μg/m3
Ozone: 94.08 μg/m3
Astronomical
Sunrise: 5:33 AM
Sun Transit: 12:56 AM
Sunset: 8:20 PM
Daylight: 14 hrs 46 mins
Sun Transit: 12:56 AM
Sunset: 8:20 PM
Daylight: 14 hrs 46 mins
Moonrise: 12:45 AM
Moon Transit: 6:12 PM
Moonset: 12:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%
Moon Transit: 6:12 PM
Moonset: 12:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%
Best Times for Fishing or Hunting
Major Periods
5:40 AM - 8:10 AM5:42 PM - 8:12 PM
Minor Periods
12:15 AM - 1:45 PM12:00 AM - 12:00 AM
Action Rating: 4 out of 5
Tuesday, July 21, 2026
Weather Forecast
Patchy rain nearby
84.7°F
70.3°F
77.4°F
74%
0.29 in
71%
0%
15 mph
8
Air Quality
AQI:
1 - Good
PM2.5:
6.27 μg/m3
PM10:
6.38 μg/m3
Carbon Monoxide: 164.67 μg/m3
Nitrogen Dioxide: 5.43 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 109.42 μg/m3
Nitrogen Dioxide: 5.43 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 109.42 μg/m3
Astronomical
Sunrise: 5:34 AM
Sun Transit: 12:56 AM
Sunset: 8:19 PM
Daylight: 14 hrs 45 mins
Sun Transit: 12:56 AM
Sunset: 8:19 PM
Daylight: 14 hrs 45 mins
Moonrise: 1:50 PM
Moon Transit: 6:56 PM
Moonset: 12:30 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%
Moon Transit: 6:56 PM
Moonset: 12:30 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%
Best Times for Fishing or Hunting
Major Periods
6:24 AM - 8:54 AM6:26 PM - 8:56 PM
Minor Periods
1:20 PM - 2:50 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Wednesday, July 22, 2026
Weather Forecast
Patchy rain nearby
71°F
63.9°F
67.2°F
64%
0.03 in
39%
0%
14.3 mph
5.4
Air Quality
AQI:
1 - Good
PM2.5:
6.01 μg/m3
PM10:
6.13 μg/m3
Carbon Monoxide: 155.62 μg/m3
Nitrogen Dioxide: 3.81 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 85.08 μg/m3
Nitrogen Dioxide: 3.81 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 85.08 μg/m3
Astronomical
Sunrise: 5:35 AM
Sun Transit: 12:56 AM
Sunset: 8:18 PM
Daylight: 14 hrs 43 mins
Sun Transit: 12:56 AM
Sunset: 8:18 PM
Daylight: 14 hrs 43 mins
Moonrise: 2:55 PM
Moon Transit: 7:42 PM
Moonset: 12:55 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%
Moon Transit: 7:42 PM
Moonset: 12:55 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%
Best Times for Fishing or Hunting
Major Periods
7:09 AM - 9:39 AM7:12 PM - 9:42 PM
Minor Periods
2:25 PM - 3:55 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Thursday, July 23, 2026
Weather Forecast
Sunny
77.6°F
59.6°F
69.6°F
55%
0 in
3%
0%
5.4 mph
7
Air Quality
AQI:
1 - Good
PM2.5:
5.91 μg/m3
PM10:
6.03 μg/m3
Carbon Monoxide: 151.5 μg/m3
Nitrogen Dioxide: 11.85 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 54.38 μg/m3
Nitrogen Dioxide: 11.85 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 54.38 μg/m3
Astronomical
Sunrise: 5:36 AM
Sun Transit: 12:56 AM
Sunset: 8:17 PM
Daylight: 14 hrs 41 mins
Sun Transit: 12:56 AM
Sunset: 8:17 PM
Daylight: 14 hrs 41 mins
Moonrise: 3:59 PM
Moon Transit: 8:30 PM
Moonset: 12:23 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%
Moon Transit: 8:30 PM
Moonset: 12:23 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%
Best Times for Fishing or Hunting
Major Periods
7:56 AM - 10:26 AM8:00 PM - 10:30 PM
Minor Periods
3:29 PM - 4:59 PM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
The times presented here are based upon the solunar theory, which is the idea that the movements of
fish and other animals are affected by the location of the sun and moon. The major periods are
believed to be the times of the greatest animal activity and occur when the moon is directly
overhead or underfoot (lunar transits). The minor periods also see increased activity and
occur when the moon is rising or setting. The strongest activity occurs during full or new moons,
and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.