Excessive Heat Watch 7:00 PM Excessive Heat Warning — Lake, IN, Porter, IN, Newton, IN, Jasper, IN, Benton, IN, Northern Cook, IL, Central Cook, IL, Southern Cook, IL 12:00 AM

Chicago, Illinois

Last updated: 10:04 PM CDT  ·  Refresh
29°C
Feels like 34°
Clear
▲ 34°  /  ▼ 24°
Wind
9 mph SW
Humidity
72%
Dew Point
23°
Pressure
29.33 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
10%
Sunrise
5:19 AM
Sunset
8:29 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Chicago is currently clear at 30°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3044 J/kg) — isolated convective development possible. Sunrise: 5:19AM · Sunset: 8:29PM.

Alerts

Excessive Heat Watch
Expires 7:00 PM
Excessive Heat Warning
Lake, IN, Porter, IN, Newton, IN, Jasper, IN, Benton, IN, Northern Cook, IL, Central Cook, IL, Southern Cook, IL
Expires 12:00 AM
70 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
8%
11 PM
29°
25%
12 AM
28°
26%
1 AM
28°
7%
2 AM
27°
7%
3 AM
27°
7%
4 AM
26°
4%
5 AM
24°
4%
6 AM
24°
4%
7 AM
26°
7%
8 AM
27°
12%
9 AM
28°
16%
10 AM
30°
5%
11 AM
31°
5%
12 PM
32°
5%
1 PM
33°
5%
2 PM
33°
11%
3 PM
33°
11%
4 PM
33°
15%
5 PM
34°
25%
6 PM
33°
25%
7 PM
33°
25%
8 PM
32°
26%
9 PM
31°
17%
7-Day Forecast
Tonight
34° 24°
Clear.
Thu
34° 24°
Partly Cloudy with a 29% chance of rain.
Fri
32° 23°
Rain, 69% chance.
Sat
30° 22°
Overcast with a 72% chance of rain.
Sun
27° 20°
Clear with a 29% chance of rain.
Mon
26° 17°
Clear with a 30% chance of rain.
Tue
27° 19°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 29° Clear 8% 9 mph SW 72%
11 PM 29° Clear 25% 8 mph SW 73%
12 AM 28° Clear 26% 9 mph SW 75%
1 AM 28° Clear 7% 8 mph SW 77%
2 AM 27° Clear 7% 8 mph SW 79%
3 AM 27° Clear 7% 7 mph SW 81%
4 AM 26° Clear 4% 7 mph SW 82%
5 AM 24° Clear 4% 7 mph SW 83%
6 AM 24° Mostly Clear 4% 7 mph SW 82%
7 AM 26° Mostly Clear 7% 7 mph SW 80%
8 AM 27° Partly Cloudy 12% 8 mph SW 74%
9 AM 28° Partly Cloudy 16% 8 mph SW 69%
10 AM 30° Mostly Cloudy 5% 8 mph SW 63%
11 AM 31° Mostly Cloudy 5% 9 mph SW 57%
12 PM 32° Partly Cloudy 5% 10 mph SW 53%
1 PM 33° Mostly Cloudy 5% 11 mph SW 48%
2 PM 33° Mostly Cloudy 11% 12 mph SW 47%
3 PM 33° Partly Cloudy 11% 13 mph SW 47%
4 PM 33° Partly Cloudy 15% 14 mph SW 47%
5 PM 34° Partly Cloudy 25% 13 mph SW 50%
6 PM 33° Mostly Clear 25% 13 mph SW 52%
7 PM 33° Mostly Clear 25% 12 mph SW 55%
8 PM 32° Mostly Clear 26% 12 mph SW 59%
9 PM 31° Clear 17% 10 mph SW 63%
15-Day Forecast
Today
7/1
Clear
8%
24°
34°
Thu
7/2
Partly Cloudy
29%
24°
34°
Fri
7/3
Rain
69%
23°
32°
Sat
7/4
Overcast
72%
22°
30°
Sun
7/5
Clear
29%
20°
27°
Mon
7/6
Clear
30%
17°
26°
Tue
7/7
Clear
17%
19°
27°
Wed
7/8
Clear
17%
20°
28°
Thu
7/9
Drizzle
68%
22°
30°
Fri
7/10
Thunderstorm
68%
21°
31°
Sat
7/11
Drizzle
60%
21°
30°
Sun
7/12
Drizzle
60%
20°
29°
Mon
7/13
Drizzle
60%
20°
26°
Tue
7/14
Drizzle
60%
21°
26°
Wed
7/15
Drizzle
60%
20°
25°
70
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
70 AQI 19.3 µg/m³
O3
Ground-level ozone
42 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 70 Moderate 42 70
Fri 54 Moderate 41 54
Sat 53 Moderate 42 53
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 Thu Jul 2, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2330 J/kg
MLCAPE2167 J/kg
MUCAPE2330 J/kg
SBCIN-181 J/kg
MLCIN0 J/kg
Lifted Index-7.0
Kinematics
0–6 km Shear16 kt
0–1 km Shear15 kt
Eff. Shear22 kt
0–1 km SRH-5
0–3 km SRH-51
Eff. SRH-51
Storm Motion217° @ 32 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index24.2
Thermo & Levels
PWAT1.46 in
0–3 km LR5.5 °C/km
700–500 LR7.3 °C/km
Total Totals46.9
LCL905 hPa
LFC699 hPa
EL169 hPa
Freezing Lvl15,226 ft