Joliet, Illinois

Last updated: 9:30 PM CDT  ·  Refresh
26°C
Feels like 28°
Partly Cloudy
▲ 29°  /  ▼ 21°
Wind
9 mph SSW
Humidity
87%
Dew Point
23°
Pressure
29.03 inHg
Visibility
3 mi
UV Index
0.0
Cloud Cover
39%
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 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2253 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
26°
24%
10 PM
27°
36%
11 PM
26°
35%
12 AM
26°
14%
1 AM
24°
3%
2 AM
24°
3%
3 AM
23°
3%
4 AM
23°
3%
5 AM
21°
3%
6 AM
21°
3%
7 AM
21°
3%
8 AM
22°
3%
9 AM
23°
3%
10 AM
24°
3%
11 AM
25°
3%
12 PM
26°
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%
7-Day Forecast
Tonight
29° 21°
Partly Cloudy with a 24% chance of rain.
Tue
26° 18°
Mostly Cloudy.
Wed
29° 17°
Clear.
Thu
28° 19°
Partly Cloudy.
Fri
23° 18°
Rain, 51% chance.
Sat
28° 17°
Rain, 77% chance.
Sun
28° 17°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Partly Cloudy 24% 9 mph SSW 87%
10 PM 27° Partly Cloudy 36% 9 mph SW 90%
11 PM 26° Mostly Clear 35% 7 mph WSW 89%
12 AM 26° Clear 14% 6 mph W 88%
1 AM 24° Mostly Clear 3% 6 mph WNW 86%
2 AM 24° Partly Cloudy 3% 7 mph NNW 86%
3 AM 23° Partly Cloudy 3% 9 mph N 88%
4 AM 23° Partly Cloudy 3% 11 mph N 88%
5 AM 21° Mostly Cloudy 3% 10 mph N 88%
6 AM 21° Mostly Cloudy 3% 10 mph N 88%
7 AM 21° Mostly Cloudy 3% 10 mph N 86%
8 AM 22° Overcast 3% 10 mph N 84%
9 AM 23° Overcast 3% 10 mph N 82%
10 AM 24° Overcast 3% 10 mph N 78%
11 AM 25° Mostly Cloudy 3% 11 mph N 73%
12 PM 26° Partly Cloudy 3% 11 mph NNE 67%
1 PM 23° Partly Cloudy 3% 11 mph NNE 63%
2 PM 24° Partly Cloudy 3% 11 mph NNE 61%
3 PM 24° Partly Cloudy 3% 11 mph NNE 59%
4 PM 24° Partly Cloudy 3% 11 mph NNE 58%
5 PM 25° Partly Cloudy 3% 10 mph NNE 59%
6 PM 24° Partly Cloudy 3% 10 mph NNE 60%
7 PM 23° Partly Cloudy 3% 10 mph NNE 61%
8 PM 22° Partly Cloudy 3% 9 mph NNE 62%
15-Day Forecast
Today
7/27
Partly Cloudy
24%
21°
29°
Tue
7/28
Mostly Cloudy
14%
18°
26°
Wed
7/29
Clear
7%
17°
29°
Thu
7/30
Partly Cloudy
17%
19°
28°
Fri
7/31
Rain
51%
18°
23°
Sat
8/1
Rain
77%
17°
28°
Sun
8/2
Clear
17%
17°
28°
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, 01:00'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
SBCAPE1266 J/kg
MLCAPE2569 J/kg
MUCAPE4075 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.9
Kinematics
0–6 km Shear47 kt
0–1 km Shear21 kt
Eff. Shear56 kt
0–1 km SRH154
0–3 km SRH67
Eff. SRH67
Storm Motion281° @ 36 kt
0–1 km EHI1.2
Composite Parameters
Sig. Tornado1.8
STP (eff)0.9
Supercell7.8
K-Index6.0
Thermo & Levels
PWAT1.61 in
0–3 km LR4.0 °C/km
700–500 LR7.3 °C/km
Total Totals52.9
LCL953 hPa
LFC983 hPa
EL208 hPa
Freezing Lvl16,070 ft