La Salle County, IL Weather Forecast
County weather hub
Sunny
Compare major city weather across LaSalle County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 91. Northwest wind 0 to 5 mph.
County Weather Overview
This county weather page brings together forecast coverage for LaSalle County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 9 of 9 mapped cities in LaSalle County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 14 to Jul 18, 2026
- Latest sync
- Jul 12, 2026 8:32 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in LaSalle County
Tuesday looks like the warmest upcoming period in LaSalle County at 91 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 71 degrees F.
The strongest winds are forecast for Friday at about 5 to 10 mph S.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 12, 2026 8:32 AM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 72.
Sunny, with a high near 91.
Mostly clear, with a low around 71.
Sunny, with a high near 91.
Mostly clear, with a low around 71.
Mostly sunny, with a high near 91.
Partly cloudy, with a low around 72.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 90.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 71.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
91°F |
0 to 5 mph
NW
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
72°F |
0 to 5 mph
WNW
|
|
Wednesday
Jul 15
|
Sunny
|
91°F |
5 mph
WNW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
71°F |
0 to 5 mph
N
|
|
Thursday
Jul 16
|
Sunny
|
91°F |
0 to 5 mph
WNW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
71°F |
5 mph
SSW
|
|
Friday
Jul 17
|
Mostly Sunny
|
91°F |
5 to 10 mph
S
|
|
Friday Night
Jul 17
|
Partly Cloudy
|
72°F |
5 to 10 mph
SSW
|
|
Saturday
Jul 18
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
90°F |
10 mph
SW
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
71°F |
10 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across LaSalle County.
Coverage
Forecast coverage currently spans 9 of 9 mapped cities in LaSalle County.
Largest mapped city population in this region: 18,097.
