Excessive Heat Watch 10:00 PM Heat Advisory — Lake, IN, Porter, IN, Newton, IN, Jasper, IN, Benton, IN, Northern Cook, IL, Central Cook, IL, Southern Cook, IL 10:00 PM Excessive Heat Warning — Northern Cook, IL, Central Cook, IL, Southern Cook, IL, Lake, IN, Porter, IN, Newton, IN, Jasper, IN, Benton, IN 12:00 AM

Chicago, Illinois

Last updated: 4:41 PM CDT  ·  Refresh
33°C
Feels like 39°
Mostly Clear
▲ 33°  /  ▼ 24°
Wind
16 mph SSW
Humidity
57%
Dew Point
23°
Pressure
29.27 inHg
Visibility
10 mi
UV Index
7.2
Cloud Cover
11%
Sunrise
5:18 AM
Sunset
8:29 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Chicago is currently mostly clear at 33°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3345 J/kg) — isolated convective development possible. Sunrise: 5:18AM · Sunset: 8:29PM.

Alerts

Excessive Heat Watch
Expires 10:00 PM
Heat Advisory
Lake, IN, Porter, IN, Newton, IN, Jasper, IN, Benton, IN, Northern Cook, IL, Central Cook, IL, Southern Cook, IL
Expires 10:00 PM
Excessive Heat Warning
Northern Cook, IL, Central Cook, IL, Southern Cook, IL, Lake, IN, Porter, IN, Newton, IN, Jasper, IN, Benton, IN
Expires 12:00 AM
73 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
3%
5 PM
33°
23%
6 PM
33°
23%
7 PM
32°
23%
8 PM
31°
23%
9 PM
29°
23%
10 PM
29°
23%
11 PM
28°
16%
12 AM
28°
16%
1 AM
27°
3%
2 AM
26°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
24°
3%
6 AM
24°
3%
7 AM
26°
3%
8 AM
27°
3%
9 AM
28°
3%
10 AM
29°
3%
11 AM
31°
3%
12 PM
32°
3%
1 PM
32°
3%
2 PM
32°
3%
3 PM
32°
3%
7-Day Forecast
Today
33° 24°
Clear with a 23% chance of rain.
Wed
33° 24°
Clear.
Thu
34° 26°
Mostly Clear.
Fri
32° 24°
Partly Cloudy with a 71% chance of rain.
Sat
30° 22°
Rain, 81% chance.
Sun
29° 22°
Partly Cloudy with a 60% chance of rain.
Mon
28° 22°
Overcast.
TimeTempConditionsPrecipWindHumidity
Now 33° Mostly Clear 3% 16 mph SSW 57%
5 PM 33° Clear 23% 16 mph SSW 57%
6 PM 33° Clear 23% 16 mph SSW 61%
7 PM 32° Clear 23% 14 mph SW 65%
8 PM 31° Clear 23% 12 mph SW 69%
9 PM 29° Clear 23% 11 mph SW 72%
10 PM 29° Clear 23% 10 mph SW 75%
11 PM 28° Clear 16% 9 mph SW 78%
12 AM 28° Clear 16% 9 mph SW 80%
1 AM 27° Clear 3% 8 mph SW 82%
2 AM 26° Clear 3% 8 mph SW 83%
3 AM 26° Clear 3% 8 mph SW 85%
4 AM 26° Clear 3% 8 mph SW 85%
5 AM 24° Clear 3% 9 mph SW 84%
6 AM 24° Clear 3% 9 mph SW 82%
7 AM 26° Clear 3% 10 mph SW 76%
8 AM 27° Clear 3% 10 mph SW 68%
9 AM 28° Clear 3% 10 mph SW 59%
10 AM 29° Clear 3% 10 mph SW 55%
11 AM 31° Clear 3% 10 mph SW 53%
12 PM 32° Clear 3% 10 mph SW 51%
1 PM 32° Clear 3% 11 mph SW 50%
2 PM 32° Clear 3% 11 mph SW 50%
3 PM 32° Clear 3% 12 mph SW 50%
15-Day Forecast
Today
6/30
Clear
23%
24°
33°
Wed
7/1
Clear
7%
24°
33°
Thu
7/2
Mostly Clear
16%
26°
34°
Fri
7/3
Partly Cloudy
71%
24°
32°
Sat
7/4
Rain
81%
22°
30°
Sun
7/5
Partly Cloudy
60%
22°
29°
Mon
7/6
Overcast
19%
22°
28°
Tue
7/7
Mostly Cloudy
60%
22°
28°
Wed
7/8
Thunderstorm
60%
22°
29°
Thu
7/9
Drizzle
60%
22°
28°
Fri
7/10
Drizzle
60%
20°
26°
Sat
7/11
Drizzle
60%
21°
26°
Sun
7/12
Drizzle
60%
21°
26°
Mon
7/13
Drizzle
60%
19°
24°
Tue
7/14
Drizzle
60%
19°
24°
73
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
73 AQI 20.7 µg/m³
O3
Ground-level ozone
41 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 73 Moderate 41 73
Thu 69 Moderate 43 69
Fri 47 Good 39 47
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Tue Jun 30, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3424 J/kg
MLCAPE3067 J/kg
MUCAPE3424 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-6.4
Kinematics
0–6 km Shear22 kt
0–1 km Shear10 kt
Eff. Shear21 kt
0–1 km SRH29
0–3 km SRH-31
Eff. SRH-31
Storm Motion227° @ 38 kt
0–1 km EHI0.6
Composite Parameters
Sig. Tornado0.2
STP (eff)0.0
Supercell0.0
K-Index20.7
Thermo & Levels
PWAT1.43 in
0–3 km LR6.8 °C/km
700–500 LR6.5 °C/km
Total Totals46.8
LCL858 hPa
LFC991 hPa
EL149 hPa
Freezing Lvl16,220 ft