Charlemagne, IL Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Charlemagne, IL in one place.
A slight chance of showers and thunderstorms before 7am, then showers and thunderstorms likely between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 71. Northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Local Weather Overview
This forecast page for Charlemagne, 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: Sep 15, 2026 12:27 AM CDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Charlemagne, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 12:27 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Charlemagne
Saturday looks like the warmest upcoming period in Charlemagne at 81 degrees F.
Sunday 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 SW.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 12:27 AM CDT
- Coverage
- 6 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 showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 67. Southeast wind 0 to 10 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely before 1pm. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.
A chance of rain showers after 1am. Mostly cloudy, with a low around 63.
A chance of rain showers. Mostly cloudy, with a high near 78.
A slight chance of rain showers before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 81.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 76.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
A chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 74.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
71°F |
5 to 10 mph
NE
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
67°F |
0 to 10 mph
SE
|
|
Thursday
Sep 17
|
Showers And Thunderstorms Likely
|
76°F |
0 to 5 mph
NW
|
|
Thursday Night
Sep 17
|
Mostly Cloudy then Chance Rain Showers
|
63°F |
5 mph
NE
|
|
Friday
Sep 18
|
Chance Rain Showers
|
78°F |
5 to 10 mph
E
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
66°F |
5 to 10 mph
SE
|
|
Saturday
Sep 19
|
Chance Showers And Thunderstorms
|
81°F |
10 to 15 mph
SW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
63°F |
10 mph
NNW
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
76°F |
10 to 15 mph
NE
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
60°F |
10 mph
NE
|
|
Monday
Sep 21
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
74°F |
10 to 15 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Charlemagne.