Lemont, IL Weather Forecast
Local 7-day forecast
Smoke
Track current conditions, temperature changes, wind, and the full daily outlook for Lemont, IL in one place.
Smoke. Mostly cloudy, with a low around 73. East wind around 0 mph.
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: Jul 17, 2026 6:29 AM CDT.
The active forecast window currently covers Jul 17 to Jul 23, 2026 for Lemont, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 6:29 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Lemont
Friday looks like the warmest upcoming period in Lemont at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Saturday at about 10 to 15 mph WNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 6:29 AM CDT
- Coverage
- 7 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
Smoke before 7am, then smoke and scattered showers and thunderstorms. Partly sunny. High near 90, with temperatures falling to around 87 in the afternoon. Heat index values as high as 98. South southwest wind 0 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Scattered showers and thunderstorms before 10pm. Partly cloudy, with a low around 73. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 90. Heat index values as high as 101. West northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 67. North northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunny, with a high near 85.
Partly cloudy, with a low around 65.
Mostly sunny, with a high near 87.
Showers and thunderstorms likely between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 72.
A chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 86.
Mostly clear, with a low around 64.
Sunny, with a high near 80.
Mostly clear, with a low around 60.
Sunny, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 17
|
Smoke
|
73°F |
0 mph
|
|
Friday
Jul 17
|
Smoke
|
90°F |
0 to 10 mph
SSW
|
|
Friday Night
Jul 17
|
Scattered Showers And Thunderstorms then Partly Cloudy
|
73°F |
5 to 10 mph
SW
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
90°F |
10 to 15 mph
WNW
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
67°F |
5 to 10 mph
NNE
|
|
Sunday
Jul 19
|
Sunny
|
85°F |
5 mph
ENE
|
|
Sunday Night
Jul 19
|
Partly Cloudy
|
65°F |
5 mph
SE
|
|
Monday
Jul 20
|
Mostly Sunny
|
87°F |
5 to 15 mph
SSW
|
|
Monday Night
Jul 20
|
Showers And Thunderstorms Likely
|
72°F |
10 to 15 mph
SW
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms then Mostly Sunny
|
86°F |
10 to 15 mph
WNW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
64°F |
10 to 15 mph
NNW
|
|
Wednesday
Jul 22
|
Sunny
|
80°F |
10 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
60°F |
0 to 10 mph
NNW
|
|
Thursday
Jul 23
|
Sunny
|
81°F |
0 to 5 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lemont.
