Lemont, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Lemont, IL in one place.
Showers and thunderstorms. Mostly cloudy, with a high near 67.
Local Weather Overview
This forecast page for Lemont, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 15, 2026 3:19 AM CDT.
The active forecast window currently covers Apr 18 to Apr 21, 2026 for Lemont, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 3:19 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Lemont
Tuesday looks like the warmest upcoming period in Lemont at 68 degrees F.
Sunday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 3:19 AM CDT
- Coverage
- 4 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
A chance of rain showers before 1am. Partly cloudy, with a low around 36.
Mostly sunny, with a high near 52.
Mostly clear, with a low around 34.
Sunny, with a high near 58.
Mostly clear, with a low around 40.
Mostly sunny, with a high near 68.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
67°F |
15 to 20 mph
SW
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
36°F |
15 to 20 mph
W
|
|
Sunday
Apr 19
|
Mostly Sunny
|
52°F |
15 to 20 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
34°F |
5 to 15 mph
NW
|
|
Monday
Apr 20
|
Sunny
|
58°F |
5 to 10 mph
W
|
|
Monday Night
Apr 20
|
Mostly Clear
|
40°F |
10 mph
SSE
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
68°F |
10 to 15 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lemont.
