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: 3:40 PM CDT  ·  Refresh
33°C
Feels like 38°
Clear
▲ 33°  /  ▼ 23°
Wind
14 mph SW
Humidity
57%
Dew Point
23°
Pressure
29.28 inHg
Visibility
10 mi
UV Index
8.3
Cloud Cover
6%
Sunrise
5:18 AM
Sunset
8:29 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Chicago is currently clear at 33°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2967 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%
4 PM
32°
3%
5 PM
33°
3%
6 PM
32°
3%
7 PM
31°
3%
8 PM
29°
3%
9 PM
28°
3%
10 PM
28°
3%
11 PM
27°
3%
12 AM
27°
3%
1 AM
26°
3%
2 AM
25°
3%
3 AM
24°
3%
4 AM
24°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
25°
3%
9 AM
26°
3%
10 AM
28°
3%
11 AM
28°
3%
12 PM
29°
3%
1 PM
29°
3%
2 PM
29°
3%
7-Day Forecast
Today
33° 23°
Clear.
Wed
31° 23°
Clear.
Thu
32° 23°
Mostly Clear.
Fri
30° 19°
Mostly Clear with a 71% chance of rain.
Sat
30° 19°
Rain, 81% chance.
Sun
28° 19°
Drizzle, 60% chance.
Mon
28° 19°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 33° Clear 3% 14 mph SW 57%
4 PM 32° Clear 3% 16 mph SSW 54%
5 PM 33° Clear 3% 17 mph SW 57%
6 PM 32° Clear 3% 16 mph SW 60%
7 PM 31° Clear 3% 14 mph SW 64%
8 PM 29° Clear 3% 12 mph SW 68%
9 PM 28° Clear 3% 11 mph SW 72%
10 PM 28° Clear 3% 10 mph SW 75%
11 PM 27° Clear 3% 9 mph SW 77%
12 AM 27° Clear 3% 9 mph SW 79%
1 AM 26° Clear 3% 9 mph SW 81%
2 AM 25° Clear 3% 8 mph SW 82%
3 AM 24° Clear 3% 9 mph SW 84%
4 AM 24° Clear 3% 9 mph SW 85%
5 AM 23° Clear 3% 9 mph SW 85%
6 AM 23° Clear 3% 9 mph SW 84%
7 AM 24° Clear 3% 10 mph SW 78%
8 AM 25° Clear 3% 10 mph SW 71%
9 AM 26° Clear 3% 10 mph SW 66%
10 AM 28° Clear 3% 10 mph SW 63%
11 AM 28° Clear 3% 11 mph SW 61%
12 PM 29° Clear 3% 11 mph SW 58%
1 PM 29° Clear 3% 11 mph SW 57%
2 PM 29° Clear 3% 12 mph SW 57%
15-Day Forecast
Today
6/30
Clear
3%
23°
33°
Wed
7/1
Clear
7%
23°
31°
Thu
7/2
Mostly Clear
16%
23°
32°
Fri
7/3
Mostly Clear
71%
19°
30°
Sat
7/4
Rain
81%
19°
30°
Sun
7/5
Drizzle
60%
19°
28°
Mon
7/6
Clear
19%
19°
28°
Tue
7/7
Clear
60%
21°
29°
Wed
7/8
Drizzle
60%
22°
31°
Thu
7/9
Drizzle
60%
19°
28°
Fri
7/10
Drizzle
60%
18°
25°
Sat
7/11
Drizzle
60%
21°
25°
Sun
7/12
Drizzle
60%
21°
25°
Mon
7/13
Drizzle
60%
19°
24°
Tue
7/14
Drizzle
60%
19°
23°
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 20.9 µg/m³
O3
Ground-level ozone
42 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 73 Moderate 42 73
Thu 69 Moderate 44 69
Fri 48 Good 39 48
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, 19:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3183 J/kg
MLCAPE3135 J/kg
MUCAPE3383 J/kg
SBCIN-63 J/kg
MLCIN0 J/kg
Lifted Index-5.6
Kinematics
0–6 km Shear22 kt
0–1 km Shear8 kt
Eff. Shear21 kt
0–1 km SRH6
0–3 km SRH-66
Eff. SRH-66
Storm Motion225° @ 36 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index22.3
Thermo & Levels
PWAT1.59 in
0–3 km LR6.8 °C/km
700–500 LR6.2 °C/km
Total Totals46.8
LCL860 hPa
LFC723 hPa
EL153 hPa
Freezing Lvl16,253 ft