Severe Thunderstorm Watch 7:00 PM Severe Thunderstorm Watch 7:00 PM Heat Advisory — Boone, IL, McHenry, IL, Kane, IL, Kendall, IL, Kankakee, IL, Iroquois, IL, Northern Will, IL, Southern Will, IL, Eastern Will, IL, Winnebago, IL, Ogle, IL, Lee, IL, De Kalb, IL, ILZ019, ILZ021, ILZ032, ILZ039, INZ002, Lake, IN, Newton, IN, Jasper, IN, Benton, IN 9:00 PM

Kankakee County, Illinois, United States

Last updated: 6:06 PM CDT  ·  Refresh
26°C
Feels like 27°
Mostly Cloudy
▲ 29°  /  ▼ 21°
Wind
10 mph S
Humidity
79%
Dew Point
23°
Pressure
29.02 inHg
Visibility
6 mi
UV Index
4.0
Cloud Cover
61%
Sunrise
5:42 AM
Sunset
8:12 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Kankakee County is currently mostly cloudy at 26°C. Precipitation is likely — peak probability 54% around 7 PM. Atmospheric instability is elevated (CAPE up to 1671 J/kg) — isolated convective development possible. Sunrise: 5:42AM · Sunset: 8:12PM.

Alerts

Severe Thunderstorm Watch
Expires 7:00 PM
Severe Thunderstorm Watch
Expires 7:00 PM
Heat Advisory
Boone, IL, McHenry, IL, Kane, IL, Kendall, IL, Kankakee, IL, Iroquois, IL, Northern Will, IL, Southern Will, IL, Eastern Will, IL, Winnebago, IL, Ogle, IL, Lee, IL, De Kalb, IL, ILZ019, ILZ021, ILZ032, ILZ039, INZ002, Lake, IN, Newton, IN, Jasper, IN, Benton, IN
Expires 9:00 PM
46 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
53%
7 PM
27°
53%
8 PM
26°
35%
9 PM
26°
35%
10 PM
26°
43%
11 PM
26°
40%
12 AM
26°
17%
1 AM
24°
4%
2 AM
24°
4%
3 AM
24°
8%
4 AM
24°
6%
5 AM
22°
6%
6 AM
21°
6%
7 AM
21°
6%
8 AM
21°
6%
9 AM
23°
3%
10 AM
23°
3%
11 AM
24°
3%
12 PM
24°
3%
1 PM
24°
3%
2 PM
24°
3%
3 PM
24°
3%
4 PM
24°
3%
5 PM
26°
3%
7-Day Forecast
Tonight
29° 21°
Mostly Cloudy with a 53% chance of rain.
Tue
26° 17°
Partly Cloudy.
Wed
28° 16°
Clear.
Thu
28° 18°
Mostly Clear with a 45% chance of rain.
Fri
23° 19°
Mostly Cloudy with a 33% chance of rain.
Sat
23° 17°
Rain, 83% chance.
Sun
26° 17°
Clear with a 21% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Cloudy 53% 10 mph S 79%
7 PM 27° Partly Cloudy 53% 11 mph SSW 76%
8 PM 26° Mostly Clear 35% 10 mph SW 78%
9 PM 26° Mostly Clear 35% 9 mph SW 79%
10 PM 26° Rain 43% 9 mph WSW 80%
11 PM 26° Clear 40% 8 mph WSW 81%
12 AM 26° Mostly Clear 17% 8 mph W 84%
1 AM 24° Partly Cloudy 4% 8 mph WNW 86%
2 AM 24° Mostly Clear 4% 7 mph NW 87%
3 AM 24° Mostly Cloudy 8% 9 mph NNW 90%
4 AM 24° Partly Cloudy 6% 10 mph NNW 93%
5 AM 22° Mostly Cloudy 6% 11 mph N 92%
6 AM 21° Mostly Cloudy 6% 11 mph N 92%
7 AM 21° Partly Cloudy 6% 12 mph N 91%
8 AM 21° Partly Cloudy 6% 12 mph N 88%
9 AM 23° Mostly Cloudy 3% 12 mph N 84%
10 AM 23° Mostly Cloudy 3% 12 mph N 81%
11 AM 24° Mostly Cloudy 3% 12 mph N 76%
12 PM 24° Mostly Cloudy 3% 12 mph N 72%
1 PM 24° Partly Cloudy 3% 12 mph N 68%
2 PM 24° Partly Cloudy 3% 12 mph N 67%
3 PM 24° Partly Cloudy 3% 12 mph N 65%
4 PM 24° Mostly Clear 3% 12 mph N 64%
5 PM 26° Clear 3% 12 mph N 65%
15-Day Forecast
Today
7/27
Mostly Cloudy
53%
21°
29°
Tue
7/28
Partly Cloudy
17%
17°
26°
Wed
7/29
Clear
6%
16°
28°
Thu
7/30
Mostly Clear
45%
18°
28°
Fri
7/31
Mostly Cloudy
33%
19°
23°
Sat
8/1
Rain
83%
17°
23°
Sun
8/2
Clear
21%
17°
26°
Mon
8/3
Clear
27%
17°
27°
Tue
8/4
Thunderstorm
66%
18°
28°
Wed
8/5
Rain
72%
19°
26°
Thu
8/6
Rain
68%
17°
26°
Fri
8/7
Drizzle
60%
19°
26°
Sat
8/8
Rain
90%
20°
26°
Sun
8/9
Drizzle
60%
19°
25°
Mon
8/10
Drizzle
60%
19°
25°
46
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
46 AQI 8.2 µg/m³
O3
Ground-level ozone
34 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 46 Good 34 46
Wed 38 Good 37 38
Thu 45 Good 40 45
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 Jul 27, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1395 J/kg
MLCAPE1777 J/kg
MUCAPE2394 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.8
Kinematics
0–6 km Shear50 kt
0–1 km Shear24 kt
Eff. Shear55 kt
0–1 km SRH217
0–3 km SRH211
Eff. SRH211
Storm Motion274° @ 38 kt
0–1 km EHI1.9
Composite Parameters
Sig. Tornado2.9
STP (eff)3.1
Supercell14.4
K-Index37.6
Thermo & Levels
PWAT1.97 in
0–3 km LR4.5 °C/km
700–500 LR6.9 °C/km
Total Totals50.8
LCL945 hPa
LFC983 hPa
EL207 hPa
Freezing Lvl15,482 ft