Chicago, Illinois

Last updated: 8:41 AM CDT  ·  Refresh
16°C
Feels like 14°
Clear
▲ 23°  /  ▼ 12°
Wind
3 mph SSE
Humidity
69%
Dew Point
11°
Pressure
29.61 inHg
Visibility
10 mi
UV Index
5.1
Cloud Cover
8%
Sunrise
6:29 AM
Sunset
7:01 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Chicago is currently clear at 16°C. Precipitation is likely — peak probability 63% around 8 AM. Sunrise: 6:29AM · Sunset: 7:01PM.

Alerts

No active alerts for this location.
28 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
16°
11%
9 AM
17°
21%
10 AM
18°
21%
11 AM
19°
21%
12 PM
19°
14%
1 PM
21°
3%
2 PM
21°
3%
3 PM
22°
3%
4 PM
22°
19%
5 PM
23°
5%
6 PM
23°
5%
7 PM
22°
13%
8 PM
22°
22%
9 PM
20°
22%
10 PM
20°
32%
11 PM
20°
32%
12 AM
20°
36%
1 AM
20°
36%
2 AM
20°
37%
3 AM
19°
38%
4 AM
19°
47%
5 AM
18°
48%
6 AM
18°
57%
7 AM
19°
49%
7-Day Forecast
Today
23° 12°
Partly Cloudy with a 32% chance of rain.
Tue
28° 18°
Mostly Cloudy with a 62% chance of rain.
Wed
25° 19°
Mostly Cloudy with a 60% chance of rain.
Thu
24° 19°
Mostly Cloudy with a 90% chance of rain.
Fri
27° 18°
Rain, 82% chance.
Sat
31° 20°
Rain, 82% chance.
Sun
22° 18°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 16° Clear 11% 3 mph SSE 69%
9 AM 17° Partly Cloudy 21% 6 mph SE 61%
10 AM 18° Mostly Cloudy 21% 8 mph SE 54%
11 AM 19° Overcast 21% 9 mph ESE 48%
12 PM 19° Overcast 14% 10 mph ESE 44%
1 PM 21° Mostly Cloudy 3% 11 mph ESE 45%
2 PM 21° Mostly Cloudy 3% 11 mph SE 44%
3 PM 22° Mostly Cloudy 3% 12 mph SE 44%
4 PM 22° Partly Cloudy 19% 13 mph SE 44%
5 PM 23° Partly Cloudy 5% 13 mph SE 45%
6 PM 23° Partly Cloudy 5% 13 mph SE 46%
7 PM 22° Partly Cloudy 13% 14 mph SSE 49%
8 PM 22° Partly Cloudy 22% 15 mph SSE 51%
9 PM 20° Partly Cloudy 22% 16 mph SSE 53%
10 PM 20° Mostly Clear 32% 16 mph SSE 56%
11 PM 20° Partly Cloudy 32% 16 mph SSE 58%
12 AM 20° Mostly Cloudy 36% 16 mph SSE 59%
1 AM 20° Mostly Cloudy 36% 16 mph S 60%
2 AM 20° Mostly Cloudy 37% 16 mph S 61%
3 AM 19° Mostly Cloudy 38% 16 mph S 62%
4 AM 19° Mostly Cloudy 47% 16 mph S 63%
5 AM 18° Mostly Cloudy 48% 15 mph S 65%
6 AM 18° Mostly Cloudy 57% 14 mph SSW 67%
7 AM 19° Mostly Cloudy 49% 14 mph SSW 68%
15-Day Forecast
Today
9/14
Partly Cloudy
32%
12°
23°
Tue
9/15
Mostly Cloudy
62%
18°
28°
Wed
9/16
Mostly Cloudy
60%
19°
25°
Thu
9/17
Mostly Cloudy
90%
19°
24°
Fri
9/18
Rain
82%
18°
27°
Sat
9/19
Rain
82%
20°
31°
Sun
9/20
Rain
82%
18°
22°
Mon
9/21
Rain
69%
18°
22°
Tue
9/22
Drizzle
68%
18°
26°
Wed
9/23
Rain
50%
17°
27°
Thu
9/24
Clear
50%
14°
22°
Fri
9/25
Drizzle
60%
17°
22°
Sat
9/26
Drizzle
60%
16°
21°
Sun
9/27
Clear
60%
16°
22°
Mon
9/28
Drizzle
60%
16°
22°
28
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
15 AQI 2.8 µg/m³
O3
Ground-level ozone
Dominant
28 AQI 30 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 28 Good 28 15
Wed 31 Good 30 31
Thu 34 Good 34 18
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 Mon Sep 14, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 100 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2 J/kg
MLCAPE11 J/kg
MUCAPE0 J/kg
SBCIN-0 J/kg
MLCIN0 J/kg
Lifted Index12.0
Kinematics
0–6 km Shear39 kt
0–1 km Shear8 kt
Eff. Shear—
0–1 km SRH-62
0–3 km SRH85
Eff. SRH—
Storm Motion342° @ 24 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-19.5
Thermo & Levels
PWAT0.61 in
0–3 km LR2.7 °C/km
700–500 LR6.0 °C/km
Total Totals24.5
LCL944 hPa
LFC1003 hPa
EL990 hPa
Freezing Lvl14,501 ft