Will County, Illinois, United States

Last updated: 9:11 PM CDT · Refresh

21°C

Feels like 23°

Overcast

▲ 27° / ▼ 14°

Wind

7 mph WSW

Humidity

92%

Dew Point

19°

Pressure

29.24 inHg

Visibility

9 mi

UV Index

0.0

Cloud Cover

91%

Sunrise

6:07 AM

Sunset

7:42 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Will County is currently overcast at 21°C. Precipitation is likely — peak probability 64% around 9 PM. Atmospheric instability is elevated (CAPE up to 1492 J/kg) — isolated convective development possible. Sunrise: 6:07AM · Sunset: 7:42PM.

47 AQI · Good Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

21°

64%

10 PM

21°

46%

11 PM

20°

50%

12 AM

20°

32%

1 AM

19°

21%

2 AM

19°

3 AM

19°

11%

4 AM

19°

5 AM

18°

6 AM

17°

15%

7 AM

17°

15%

8 AM

18°

23%

9 AM

20°

13%

10 AM

21°

31%

11 AM

22°

32%

12 PM

23°

32%

1 PM

26°

26%

2 PM

26°

29%

3 PM

26°

38%

4 PM

27°

27%

5 PM

26°

12%

6 PM

25°

13%

7 PM

24°

8 PM

23°

7-Day Forecast

Tonight

27° 14°

Overcast with a 64% chance of rain.

Sat

27° 16°

Mostly Clear with a 38% chance of rain.

Sun

24° 13°

Partly Cloudy.

Mon

23° 11°

Overcast with a 37% chance of rain.

Tue

25° 12°

Clear with a 43% chance of rain.

Wed

28° 14°

Rain, 64% chance.

Thu

28° 17°

Drizzle, 52% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 21° Overcast 64% 7 mph WSW 92%

10 PM 21° Overcast 46% 9 mph WSW 92%

11 PM 20° Mostly Cloudy 50% 7 mph WSW 93%

12 AM 20° Mostly Cloudy 32% 5 mph WSW 94%

1 AM 19° Partly Cloudy 21% 6 mph WSW 95%

2 AM 19° Mostly Clear 9% 6 mph WSW 96%

3 AM 19° Partly Cloudy 11% 7 mph W 96%

4 AM 19° Partly Cloudy 6% 7 mph W 96%

5 AM 18° Partly Cloudy 6% 8 mph WNW 96%

6 AM 17° Partly Cloudy 15% 8 mph NW 96%

7 AM 17° Partly Cloudy 15% 9 mph NW 94%

8 AM 18° Partly Cloudy 23% 10 mph NW 89%

9 AM 20° Partly Cloudy 13% 11 mph NW 84%

10 AM 21° Partly Cloudy 31% 11 mph NW 79%

11 AM 22° Partly Cloudy 32% 12 mph NW 75%

12 PM 23° Mostly Clear 32% 12 mph NW 71%

1 PM 26° Mostly Clear 26% 12 mph NW 68%

2 PM 26° Mostly Clear 29% 12 mph NW 68%

3 PM 26° Mostly Clear 38% 12 mph NW 68%

4 PM 27° Mostly Clear 27% 12 mph WNW 68%

5 PM 26° Clear 12% 11 mph WNW 70%

6 PM 25° Clear 13% 10 mph NW 73%

7 PM 24° Clear 3% 9 mph NW 75%

8 PM 23° Clear 3% 8 mph NW 77%

15-Day Forecast

Today

8/21

Overcast

64%

14°

27°

Sat

8/22

Mostly Clear

38%

16°

27°

Sun

8/23

Partly Cloudy

13°

24°

Mon

8/24

Overcast

37%

11°

23°

Tue

8/25

Clear

43%

12°

25°

Wed

8/26

Rain

64%

14°

28°

Thu

8/27

Drizzle

52%

17°

28°

Fri

8/28

Clear

17%

17°

28°

Sat

8/29

Drizzle

68%

17°

28°

Sun

8/30

Rain

68%

19°

28°

Mon

8/31

Drizzle

60%

20°

32°

Tue

9/1

Drizzle

60%

19°

32°

Wed

9/2

Drizzle

60%

19°

28°

Thu

9/3

Drizzle

60%

18°

27°

Fri

9/4

Drizzle

60%

17°

28°

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

PM_2.5

Fine particulate matter

Dominant

47 AQI 8.4 µg/m³

O₃

Ground-level ozone

38 AQI 42 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Today 47 Good 38 47

Sun 29 Good 29 23

Mon 24 Good 24 11

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. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Fri Aug 21, 23:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE889 J/kg

MLCAPE1046 J/kg

MUCAPE1308 J/kg

SBCIN-158 J/kg

MLCIN-64 J/kg

Lifted Index-3.0

Kinematics

0–6 km Shear32 kt

0–1 km Shear15 kt

Eff. Shear30 kt

0–1 km SRH91

0–3 km SRH131

Eff. SRH131

Storm Motion336° @ 17 kt

0–1 km EHI0.5

Composite Parameters

Sig. Tornado0.3

STP (eff)0.4

Supercell2.6

K-Index35.4

Thermo & Levels

PWAT1.68 in

0–3 km LR5.3 °C/km

700–500 LR6.5 °C/km

Total Totals51.3

LCL956 hPa

LFC725 hPa

EL236 hPa

Freezing Lvl12,159 ft

Will County, Illinois, United States

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