Joliet, Illinois

Last updated: 11:17 PM CDT  ·  Refresh
25°C
Feels like 28°
Partly Cloudy
▲ 27°  /  ▼ 21°
Wind
5 mph SW
Humidity
92%
Dew Point
24°
Pressure
29.04 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
38%
Sunrise
5:42 AM
Sunset
8:14 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Joliet is currently partly cloudy at 25°C. Precipitation is likely — peak probability 50% around 12 AM. Atmospheric instability is elevated (CAPE up to 2018 J/kg) — isolated convective development possible. Sunrise: 5:42AM · Sunset: 8:14PM.

Alerts

No active alerts for this location.
49 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
49%
12 AM
26°
50%
1 AM
24°
4%
2 AM
24°
5%
3 AM
23°
5%
4 AM
22°
5%
5 AM
21°
6%
6 AM
21°
3%
7 AM
21°
3%
8 AM
22°
3%
9 AM
23°
3%
10 AM
23°
3%
11 AM
24°
3%
12 PM
25°
3%
1 PM
23°
3%
2 PM
24°
3%
3 PM
24°
3%
4 PM
24°
3%
5 PM
25°
3%
6 PM
24°
3%
7 PM
23°
3%
8 PM
22°
3%
9 PM
21°
3%
10 PM
21°
3%
7-Day Forecast
Tonight
27° 21°
Partly Cloudy with a 49% chance of rain.
Tue
26° 17°
Partly Cloudy.
Wed
29° 17°
Clear.
Thu
28° 19°
Partly Cloudy with a 25% chance of rain.
Fri
23° 18°
Fog with a 69% chance of rain.
Sat
28° 17°
Drizzle, 69% chance.
Sun
27° 17°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Partly Cloudy 49% 5 mph SW 92%
12 AM 26° Mostly Clear 50% 7 mph WSW 91%
1 AM 24° Clear 4% 5 mph WNW 91%
2 AM 24° Mostly Clear 5% 6 mph NNW 90%
3 AM 23° Partly Cloudy 5% 9 mph N 89%
4 AM 22° Partly Cloudy 5% 10 mph N 89%
5 AM 21° Partly Cloudy 6% 10 mph N 90%
6 AM 21° Mostly Cloudy 3% 10 mph N 90%
7 AM 21° Mostly Cloudy 3% 10 mph N 89%
8 AM 22° Overcast 3% 10 mph N 86%
9 AM 23° Overcast 3% 10 mph N 84%
10 AM 23° Mostly Cloudy 3% 10 mph N 81%
11 AM 24° Mostly Cloudy 3% 10 mph N 77%
12 PM 25° Partly Cloudy 3% 10 mph N 73%
1 PM 23° Partly Cloudy 3% 10 mph N 68%
2 PM 24° Mostly Clear 3% 10 mph N 64%
3 PM 24° Mostly Clear 3% 10 mph N 61%
4 PM 24° Clear 3% 10 mph NNE 59%
5 PM 25° Clear 3% 10 mph NNE 60%
6 PM 24° Clear 3% 10 mph NNE 61%
7 PM 23° Clear 3% 9 mph NNE 62%
8 PM 22° Clear 3% 9 mph NNE 63%
9 PM 21° Clear 3% 8 mph NNE 64%
10 PM 21° Clear 3% 8 mph NNE 66%
15-Day Forecast
Today
7/27
Partly Cloudy
49%
21°
27°
Tue
7/28
Partly Cloudy
6%
17°
26°
Wed
7/29
Clear
6%
17°
29°
Thu
7/30
Partly Cloudy
25%
19°
28°
Fri
7/31
Fog
69%
18°
23°
Sat
8/1
Drizzle
69%
17°
28°
Sun
8/2
Clear
17%
17°
27°
Mon
8/3
Clear
17%
17°
28°
Tue
8/4
Drizzle
44%
18°
29°
Wed
8/5
Drizzle
44%
20°
29°
Thu
8/6
Rain
64%
19°
31°
Fri
8/7
Drizzle
60%
18°
31°
Sat
8/8
Drizzle
60%
18°
27°
Sun
8/9
Drizzle
60%
19°
27°
Mon
8/10
Drizzle
60%
19°
27°
49
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
49 AQI 8.8 µg/m³
O3
Ground-level ozone
35 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 49 Good 35 49
Wed 36 Good 36 28
Thu 47 Good 47 42
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 Jul 28, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1137 J/kg
MLCAPE2495 J/kg
MUCAPE3681 J/kg
SBCIN-205 J/kg
MLCIN0 J/kg
Lifted Index-4.1
Kinematics
0–6 km Shear45 kt
0–1 km Shear24 kt
Eff. Shear53 kt
0–1 km SRH79
0–3 km SRH55
Eff. SRH55
Storm Motion284° @ 35 kt
0–1 km EHI0.6
Composite Parameters
Sig. Tornado0.9
STP (eff)0.0
Supercell5.5
K-Index42.1
Thermo & Levels
PWAT2.26 in
0–3 km LR4.2 °C/km
700–500 LR6.5 °C/km
Total Totals52.2
LCL965 hPa
LFC634 hPa
EL213 hPa
Freezing Lvl16,201 ft