LaSalle, Illinois

Last updated: 5:13 PM CDT · Refresh

25°C

Feels like 28°

Overcast

▲ 28° / ▼ 19°

Wind

6 mph NNE

Humidity

86%

Dew Point

22°

Pressure

29.30 inHg

Visibility

10 mi

UV Index

3.3

Cloud Cover

87%

Sunrise

5:28 AM

Sunset

8:32 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: LaSalle is currently overcast at 25°C. Precipitation is likely — peak probability 67% around 5 PM. Atmospheric instability is elevated (CAPE up to 1498 J/kg) — isolated convective development possible. Sunrise: 5:28AM · Sunset: 8:32PM.

54 AQI · Moderate Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

25°

67%

6 PM

26°

36%

7 PM

26°

42%

8 PM

24°

44%

9 PM

23°

26%

10 PM

22°

38%

11 PM

22°

26%

12 AM

22°

35%

1 AM

21°

22%

2 AM

21°

37%

3 AM

21°

23%

4 AM

21°

23%

5 AM

19°

23%

6 AM

19°

15%

7 AM

19°

8 AM

20°

9 AM

22°

10 AM

22°

21%

11 AM

23°

25%

12 PM

25°

28%

1 PM

25°

28%

2 PM

25°

28%

3 PM

26°

28%

4 PM

26°

18%

7-Day Forecast

Today

28° 19°

Overcast with a 67% chance of rain.

Sun

27° 18°

Mostly Cloudy with a 37% chance of rain.

Mon

28° 17°

Clear.

Tue

28° 16°

Mostly Clear.

Wed

27° 17°

Mostly Clear with a 76% chance of rain.

Thu

26° 18°

Thunderstorm, 64% chance.

Fri

24° 18°

Rain, 71% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 25° Overcast 67% 6 mph NNE 86%

6 PM 26° Overcast 36% 6 mph NE 90%

7 PM 26° Mostly Cloudy 42% 5 mph NE 91%

8 PM 24° Mostly Cloudy 44% 4 mph NE 93%

9 PM 23° Overcast 26% 4 mph NE 94%

10 PM 22° Overcast 38% 4 mph ENE 96%

11 PM 22° Overcast 26% 4 mph NE 96%

12 AM 22° Overcast 35% 5 mph NNE 97%

1 AM 21° Overcast 22% 5 mph NNE 97%

2 AM 21° Overcast 37% 5 mph NNE 97%

3 AM 21° Overcast 23% 4 mph NNE 96%

4 AM 21° Mostly Cloudy 23% 4 mph N 97%

5 AM 19° Fog 23% 4 mph N 96%

6 AM 19° Fog 15% 4 mph N 95%

7 AM 19° Haze 5% 5 mph N 93%

8 AM 20° Mostly Cloudy 8% 5 mph N 90%

9 AM 22° Mostly Cloudy 9% 6 mph N 87%

10 AM 22° Overcast 21% 6 mph N 84%

11 AM 23° Overcast 25% 6 mph NNE 83%

12 PM 25° Overcast 28% 6 mph NNE 82%

1 PM 25° Overcast 28% 7 mph NNE 81%

2 PM 25° Mostly Cloudy 28% 6 mph NNE 80%

3 PM 26° Mostly Cloudy 28% 6 mph NNE 80%

4 PM 26° Mostly Cloudy 18% 6 mph NNE 79%

15-Day Forecast

Today

7/4

Overcast

67%

19°

28°

Sun

7/5

Mostly Cloudy

37%

18°

27°

Mon

7/6

Clear

17°

28°

Tue

7/7

Mostly Clear

14%

16°

28°

Wed

7/8

Mostly Clear

76%

17°

27°

Thu

7/9

Thunderstorm

64%

18°

26°

Fri

7/10

Rain

71%

18°

24°

Sat

7/11

Rain

69%

17°

27°

Sun

7/12

Rain

68%

15°

22°

Mon

7/13

Rain

68%

16°

26°

Tue

7/14

Overcast

31%

17°

24°

Wed

7/15

Drizzle

60%

17°

24°

Thu

7/16

Drizzle

60%

16°

23°

Fri

7/17

Drizzle

60%

16°

24°

Sat

7/18

Drizzle

60%

17°

24°

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

54 AQI 11.0 µg/m³

O₃

Ground-level ozone

35 AQI 38 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Sun 54 Moderate 35 54

Mon 52 Moderate 39 52

Tue 57 Moderate 44 57

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 Sat Jul 4, 20:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE1390 J/kg

MLCAPE562 J/kg

MUCAPE1390 J/kg

SBCIN0 J/kg

MLCIN0 J/kg

Lifted Index-3.7

Kinematics

0–6 km Shear17 kt

0–1 km Shear6 kt

Eff. Shear16 kt

0–1 km SRH-29

0–3 km SRH-33

Eff. SRH-33

Storm Motion214° @ 16 kt

0–1 km EHI-0.3

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index35.1

Thermo & Levels

PWAT1.89 in

0–3 km LR6.2 °C/km

700–500 LR5.0 °C/km

Total Totals44.4

LCL950 hPa

LFC992 hPa

EL186 hPa

Freezing Lvl14,114 ft

LaSalle, Illinois

Alerts