Lemont, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Lemont, IL in one place.
Showers and thunderstorms likely after 2pm. Some of the storms could produce heavy rain. Mostly sunny. High near 88, with temperatures falling to around 81 in the afternoon. Heat index values as high as 97. Southwest wind 5 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
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: Jun 10, 2026 8:22 AM CDT.
The active forecast window currently covers Jun 10 to Jun 16, 2026 for Lemont, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 10 to Jun 16, 2026
- Latest sync
- Jun 10, 2026 8:22 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Lemont
Today looks like the warmest upcoming period in Lemont at 88 degrees F.
Sunday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Today at about 5 to 20 mph SW.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 10, 2026 8:22 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
Showers and thunderstorms likely before 3am. Mostly cloudy, with a low around 70. South southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Showers and thunderstorms likely after 1pm. Partly sunny, with a high near 87. South southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 61. West southwest wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%.
Sunny, with a high near 78. West wind 10 to 15 mph, with gusts as high as 25 mph.
Clear, with a low around 62.
Sunny, with a high near 82.
Showers and thunderstorms likely after 7pm. Mostly cloudy, with a low around 64.
Showers and thunderstorms likely. Partly sunny, with a high near 76.
A slight chance of rain showers. Partly cloudy, with a low around 56.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 74.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jun 10
|
Mostly Sunny then Showers And Thunderstorms Likely
|
88°F |
5 to 20 mph
SW
|
|
Tonight
Jun 10
|
Showers And Thunderstorms Likely
|
70°F |
10 to 15 mph
SSW
|
|
Thursday
Jun 11
|
Partly Sunny then Showers And Thunderstorms Likely
|
87°F |
10 to 20 mph
SSW
|
|
Thursday Night
Jun 11
|
Showers And Thunderstorms
|
61°F |
10 to 20 mph
WSW
|
|
Friday
Jun 12
|
Sunny
|
78°F |
10 to 15 mph
W
|
|
Friday Night
Jun 12
|
Clear
|
62°F |
5 to 15 mph
WSW
|
|
Saturday
Jun 13
|
Sunny
|
82°F |
5 to 15 mph
SW
|
|
Saturday Night
Jun 13
|
Showers And Thunderstorms Likely
|
64°F |
10 to 15 mph
WSW
|
|
Sunday
Jun 14
|
Showers And Thunderstorms Likely
|
76°F |
5 to 15 mph
NNW
|
|
Sunday Night
Jun 14
|
Slight Chance Rain Showers
|
56°F |
5 to 10 mph
N
|
|
Monday
Jun 15
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
74°F |
5 mph
N
|
|
Monday Night
Jun 15
|
Slight Chance Showers And Thunderstorms
|
56°F |
5 mph
WNW
|
|
Tuesday
Jun 16
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
76°F |
5 to 10 mph
WSW
|
|
Tuesday Night
Jun 16
|
Slight Chance Showers And Thunderstorms
|
57°F |
5 to 10 mph
WSW
|
Nearby Forecasts
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