Lake County, Illinois, United States

Last updated: 9:12 PM CDT · Refresh

21°C

Feels like 22°

Overcast

▲ 26° / ▼ 17°

Wind

6 mph SW

Humidity

93%

Dew Point

19°

Pressure

29.13 inHg

Visibility

10 mi

UV Index

0.0

Cloud Cover

89%

Sunrise

6:05 AM

Sunset

7:43 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Lake County is currently overcast at 20°C. Precipitation is likely — peak probability 56% around 9 PM. Atmospheric instability is elevated (CAPE up to 1172 J/kg) — isolated convective development possible. Sunrise: 6:05AM · Sunset: 7:43PM.

61 AQI · Moderate Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

21°

55%

10 PM

19°

42%

11 PM

19°

22%

12 AM

19°

24%

1 AM

18°

2 AM

18°

3 AM

18°

4 AM

17°

5 AM

17°

6 AM

17°

7 AM

17°

8 AM

18°

14%

9 AM

21°

13%

10 AM

22°

14%

11 AM

23°

23%

12 PM

25°

23%

1 PM

27°

29%

2 PM

27°

37%

3 PM

27°

38%

4 PM

27°

38%

5 PM

26°

23%

6 PM

25°

24%

7 PM

24°

10%

8 PM

23°

11%

7-Day Forecast

Tonight

26° 17°

Overcast with a 55% chance of rain.

Sat

27° 16°

Partly Cloudy with a 38% chance of rain.

Sun

23° 12°

Partly Cloudy.

Mon

23° 11°

Mostly Cloudy with a 37% chance of rain.

Tue

24° 14°

Clear with a 64% chance of rain.

Wed

27° 16°

Thunderstorm, 64% chance.

Thu

27° 17°

Drizzle, 52% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 21° Overcast 55% 6 mph SW 93%

10 PM 19° Mostly Cloudy 42% 6 mph SW 94%

11 PM 19° Partly Cloudy 22% 6 mph WSW 95%

12 AM 19° Partly Cloudy 24% 7 mph W 95%

1 AM 18° Mostly Clear 8% 7 mph W 95%

2 AM 18° Mostly Clear 9% 7 mph WNW 96%

3 AM 18° Partly Cloudy 6% 7 mph WNW 96%

4 AM 17° Partly Cloudy 4% 8 mph NW 96%

5 AM 17° Partly Cloudy 4% 8 mph NW 95%

6 AM 17° Partly Cloudy 8% 8 mph NW 95%

7 AM 17° Partly Cloudy 9% 9 mph NW 93%

8 AM 18° Partly Cloudy 14% 10 mph NW 88%

9 AM 21° Partly Cloudy 13% 11 mph NW 82%

10 AM 22° Partly Cloudy 14% 11 mph NW 76%

11 AM 23° Partly Cloudy 23% 11 mph NW 70%

12 PM 25° Partly Cloudy 23% 12 mph NW 65%

1 PM 27° Partly Cloudy 29% 12 mph NW 60%

2 PM 27° Partly Cloudy 37% 12 mph NW 60%

3 PM 27° Partly Cloudy 38% 12 mph NW 59%

4 PM 27° Partly Cloudy 38% 12 mph NW 57%

5 PM 26° Partly Cloudy 23% 11 mph NW 60%

6 PM 25° Mostly Clear 24% 10 mph NW 63%

7 PM 24° Mostly Clear 10% 10 mph NW 65%

8 PM 23° Mostly Clear 11% 9 mph NW 67%

15-Day Forecast

Today

8/21

Overcast

55%

17°

26°

Sat

8/22

Partly Cloudy

38%

16°

27°

Sun

8/23

Partly Cloudy

12°

23°

Mon

8/24

Mostly Cloudy

37%

11°

23°

Tue

8/25

Clear

64%

14°

24°

Wed

8/26

Thunderstorm

64%

16°

27°

Thu

8/27

Drizzle

52%

17°

27°

Fri

8/28

Clear

17%

17°

28°

Sat

8/29

Drizzle

68%

18°

29°

Sun

8/30

Rain

68%

19°

29°

Mon

8/31

Drizzle

60%

19°

30°

Tue

9/1

Drizzle

60%

18°

29°

Wed

9/2

Drizzle

60%

18°

26°

Thu

9/3

Drizzle

60%

17°

25°

Fri

9/4

Clear

60%

17°

26°

Moderate

U.S. Air Quality Index · Dominant: PM2.5

50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

Dominant

61 AQI 14.2 µg/m³

O₃

Ground-level ozone

34 AQI 38 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Today 61 Moderate 34 61

Sun 30 Good 30 25

Mon 24 Good 24 17

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

SBCAPE818 J/kg

MLCAPE1486 J/kg

MUCAPE1795 J/kg

SBCIN-88 J/kg

MLCIN-22 J/kg

Lifted Index-2.7

Kinematics

0–6 km Shear31 kt

0–1 km Shear16 kt

Eff. Shear29 kt

0–1 km SRH99

0–3 km SRH136

Eff. SRH136

Storm Motion334° @ 17 kt

0–1 km EHI0.5

Composite Parameters

Sig. Tornado0.3

STP (eff)0.7

Supercell3.7

K-Index35.3

Thermo & Levels

PWAT1.69 in

0–3 km LR5.3 °C/km

700–500 LR6.3 °C/km

Total Totals52.5

LCL965 hPa

LFC800 hPa

EL238 hPa

Freezing Lvl12,218 ft

Lake County, Illinois, United States

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