Chicago, Illinois

Last updated: 8:38 PM CDT  ·  Refresh
26°C
Feels like 29°
Mostly Cloudy
▲ 29°  /  ▼ 21°
Wind
6 mph WNW
Humidity
85%
Dew Point
23°
Pressure
29.29 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
67%
Sunrise
5:59 AM
Sunset
7:48 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Chicago is currently mostly cloudy at 26°C. Precipitation is likely — peak probability 58% around 9 PM. Atmospheric instability is elevated (CAPE up to 1492 J/kg) — isolated convective development possible. Sunrise: 5:59AM · Sunset: 7:48PM.

Alerts

No active alerts for this location.
43 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
36%
9 PM
26°
57%
10 PM
25°
38%
11 PM
24°
25%
12 AM
23°
17%
1 AM
22°
6%
2 AM
22°
11%
3 AM
22°
11%
4 AM
21°
16%
5 AM
21°
25%
6 AM
21°
29%
7 AM
22°
29%
8 AM
22°
29%
9 AM
22°
21%
10 AM
22°
15%
11 AM
22°
18%
12 PM
23°
12%
1 PM
24°
12%
2 PM
24°
3%
3 PM
24°
3%
4 PM
24°
3%
5 PM
24°
3%
6 PM
24°
3%
7 PM
24°
3%
7-Day Forecast
Tonight
29° 21°
Mostly Cloudy with a 36% chance of rain.
Mon
26° 21°
Partly Cloudy with a 29% chance of rain.
Tue
29° 19°
Mostly Cloudy with a 90% chance of rain.
Wed
26° 21°
Mostly Cloudy with a 74% chance of rain.
Thu
27° 20°
Clear.
Fri
28° 20°
Drizzle, 51% chance.
Sat
27° 19°
Rain, 64% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Cloudy 36% 6 mph WNW 85%
9 PM 26° Mostly Cloudy 57% 6 mph NW 83%
10 PM 25° Mostly Cloudy 38% 7 mph NNW 81%
11 PM 24° Partly Cloudy 25% 8 mph NNW 81%
12 AM 23° Mostly Clear 17% 8 mph NNW 82%
1 AM 22° Mostly Clear 6% 7 mph NNW 84%
2 AM 22° Mostly Clear 11% 7 mph N 86%
3 AM 22° Mostly Clear 11% 8 mph N 88%
4 AM 21° Mostly Clear 16% 8 mph N 88%
5 AM 21° Mostly Clear 25% 9 mph NNE 86%
6 AM 21° Mostly Clear 29% 9 mph NNE 84%
7 AM 22° Partly Cloudy 29% 9 mph NNE 81%
8 AM 22° Mostly Cloudy 29% 9 mph NNE 78%
9 AM 22° Mostly Cloudy 21% 9 mph NNE 75%
10 AM 22° Partly Cloudy 15% 9 mph NNE 74%
11 AM 22° Partly Cloudy 18% 8 mph NNE 72%
12 PM 23° Mostly Clear 12% 8 mph NNE 70%
1 PM 24° Mostly Clear 12% 7 mph NNE 69%
2 PM 24° Mostly Clear 3% 7 mph NE 69%
3 PM 24° Partly Cloudy 3% 6 mph NE 69%
4 PM 24° Partly Cloudy 3% 6 mph NE 70%
5 PM 24° Partly Cloudy 3% 5 mph NE 72%
6 PM 24° Partly Cloudy 3% 4 mph NE 74%
7 PM 24° Partly Cloudy 3% 4 mph ENE 76%
15-Day Forecast
Today
8/16
Mostly Cloudy
36%
21°
29°
Mon
8/17
Partly Cloudy
29%
21°
26°
Tue
8/18
Mostly Cloudy
90%
19°
29°
Wed
8/19
Mostly Cloudy
74%
21°
26°
Thu
8/20
Clear
16%
20°
27°
Fri
8/21
Drizzle
51%
20°
28°
Sat
8/22
Rain
64%
19°
27°
Sun
8/23
Clear
17%
17°
24°
Mon
8/24
Clear
44%
16°
26°
Tue
8/25
Drizzle
68%
17°
28°
Wed
8/26
Rain
60%
20°
27°
Thu
8/27
Clear
60%
20°
27°
Fri
8/28
Drizzle
60%
19°
26°
Sat
8/29
Clear
25%
19°
26°
Sun
8/30
Drizzle
60%
20°
27°
43
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
32 AQI 5.7 µg/m³
O3
Ground-level ozone
Dominant
43 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 43 Good 43 32
Tue 37 Good 37 27
Wed 53 Moderate 39 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 Sun Aug 16, 23:00'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
SBCAPE1289 J/kg
MLCAPE1202 J/kg
MUCAPE1774 J/kg
SBCIN-35 J/kg
MLCIN-11 J/kg
Lifted Index-3.8
Kinematics
0–6 km Shear20 kt
0–1 km Shear11 kt
Eff. Shear24 kt
0–1 km SRH4
0–3 km SRH56
Eff. SRH56
Storm Motion309° @ 28 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.2
Supercell1.2
K-Index33.0
Thermo & Levels
PWAT2.20 in
0–3 km LR5.7 °C/km
700–500 LR5.5 °C/km
Total Totals44.2
LCL945 hPa
LFC887 hPa
EL172 hPa
Freezing Lvl14,902 ft