LaSalle, Illinois

Last updated: 9:39 PM CDT  ·  Refresh
28°C
Feels like 33°
Haze
▲ 34°  /  ▼ 21°
Wind
7 mph WSW
Humidity
85%
Dew Point
25°
Pressure
29.03 inHg
Visibility
1 mi
UV Index
0.0
Cloud Cover
49%
Sunrise
5:46 AM
Sunset
8:18 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: LaSalle is currently haze at 28°C. Precipitation is likely — peak probability 55% around 10 PM. Atmospheric instability is elevated (CAPE up to 3345 J/kg) — isolated convective development possible. Sunrise: 5:46AM · Sunset: 8:18PM.

Alerts

No active alerts for this location.
42 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
40%
10 PM
27°
55%
11 PM
27°
21%
12 AM
26°
14%
1 AM
26°
3%
2 AM
24°
3%
3 AM
23°
3%
4 AM
23°
3%
5 AM
22°
3%
6 AM
21°
3%
7 AM
21°
3%
8 AM
22°
3%
9 AM
23°
3%
10 AM
24°
3%
11 AM
24°
3%
12 PM
26°
3%
1 PM
26°
3%
2 PM
27°
3%
3 PM
27°
3%
4 PM
29°
3%
5 PM
29°
3%
6 PM
28°
3%
7 PM
27°
3%
8 PM
26°
3%
7-Day Forecast
Tonight
34° 21°
Haze with a 40% chance of rain.
Tue
29° 17°
Partly Cloudy.
Wed
28° 16°
Clear.
Thu
31° 19°
Partly Cloudy with a 20% chance of rain.
Fri
24° 18°
Rain, 90% chance.
Sat
29° 17°
Rain, 76% chance.
Sun
28° 16°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 28° Haze 40% 7 mph WSW 85%
10 PM 27° Partly Cloudy 55% 7 mph WSW 89%
11 PM 27° Mostly Clear 21% 8 mph W 88%
12 AM 26° Mostly Clear 14% 9 mph WNW 86%
1 AM 26° Partly Cloudy 3% 9 mph WNW 85%
2 AM 24° Partly Cloudy 3% 8 mph NW 86%
3 AM 23° Partly Cloudy 3% 8 mph NNW 89%
4 AM 23° Partly Cloudy 3% 9 mph N 91%
5 AM 22° Partly Cloudy 3% 10 mph NNE 91%
6 AM 21° Partly Cloudy 3% 10 mph NNE 90%
7 AM 21° Partly Cloudy 3% 10 mph NNE 88%
8 AM 22° Mostly Cloudy 3% 11 mph NNE 85%
9 AM 23° Mostly Cloudy 3% 10 mph NNE 82%
10 AM 24° Partly Cloudy 3% 10 mph N 79%
11 AM 24° Partly Cloudy 3% 10 mph N 75%
12 PM 26° Partly Cloudy 3% 10 mph N 72%
1 PM 26° Partly Cloudy 3% 9 mph N 69%
2 PM 27° Partly Cloudy 3% 9 mph N 67%
3 PM 27° Partly Cloudy 3% 9 mph N 65%
4 PM 29° Mostly Clear 3% 8 mph NNE 66%
5 PM 29° Mostly Clear 3% 8 mph NNE 68%
6 PM 28° Clear 3% 7 mph NNE 70%
7 PM 27° Clear 3% 7 mph NNE 70%
8 PM 26° Clear 3% 7 mph NNE 69%
15-Day Forecast
Today
7/27
Haze
40%
21°
34°
Tue
7/28
Partly Cloudy
14%
17°
29°
Wed
7/29
Clear
7%
16°
28°
Thu
7/30
Partly Cloudy
20%
19°
31°
Fri
7/31
Rain
90%
18°
24°
Sat
8/1
Rain
76%
17°
29°
Sun
8/2
Clear
17%
16°
28°
Mon
8/3
Clear
17%
15°
28°
Tue
8/4
Drizzle
44%
18°
31°
Wed
8/5
Drizzle
44%
19°
31°
Thu
8/6
Drizzle
64%
17°
32°
Fri
8/7
Drizzle
60%
17°
29°
Sat
8/8
Drizzle
60%
18°
28°
Sun
8/9
Drizzle
60%
18°
27°
Mon
8/10
Drizzle
60%
18°
28°
42
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
42 AQI 7.6 µg/m³
O3
Ground-level ozone
35 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 42 Good 35 42
Wed 53 Moderate 32 53
Thu 41 Good 35 41
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3145 J/kg
MLCAPE3733 J/kg
MUCAPE4292 J/kg
SBCIN-180 J/kg
MLCIN0 J/kg
Lifted Index-7.5
Kinematics
0–6 km Shear40 kt
0–1 km Shear20 kt
Eff. Shear49 kt
0–1 km SRH46
0–3 km SRH-22
Eff. SRH-22
Storm Motion284° @ 35 kt
0–1 km EHI0.9
Composite Parameters
Sig. Tornado1.1
STP (eff)0.0
Supercell0.0
K-Index13.3
Thermo & Levels
PWAT1.58 in
0–3 km LR4.6 °C/km
700–500 LR7.3 °C/km
Total Totals50.4
LCL942 hPa
LFC696 hPa
EL136 hPa
Freezing Lvl16,053 ft