Mendon, IL Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Mendon, IL in one place.
Patchy fog after 5am. Mostly clear, with a low around 63. Northeast wind around 2 mph.
Local Weather Overview
This forecast page for Mendon, 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: Aug 3, 2026 2:52 AM CDT.
The active forecast window currently covers Aug 3 to Aug 9, 2026 for Mendon, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 3 to Aug 9, 2026
- Latest sync
- Aug 3, 2026 2:52 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Mendon
Sunday looks like the warmest upcoming period in Mendon at 90 degrees F.
Overnight is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Sunday at about 10 mph S.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 3, 2026 2:52 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Patchy fog before 8am. Sunny, with a high near 84. East wind around 3 mph.
Mostly clear, with a low around 65. Southeast wind around 6 mph.
Sunny, with a high near 88. South wind 3 to 7 mph.
Partly cloudy, with a low around 68. Southeast wind around 6 mph.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 80%.
Showers and thunderstorms before 1pm. Partly sunny, with a high near 83. Chance of precipitation is 80%.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
A slight chance of rain showers before 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Mostly clear, with a low around 70.
Mostly sunny, with a high near 90.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Aug 3
|
Patchy Fog
|
63°F |
2 mph
NE
|
|
Monday
Aug 3
|
Patchy Fog then Sunny
|
84°F |
3 mph
E
|
|
Monday Night
Aug 3
|
Mostly Clear
|
65°F |
6 mph
SE
|
|
Tuesday
Aug 4
|
Sunny
|
88°F |
3 to 7 mph
S
|
|
Tuesday Night
Aug 4
|
Partly Cloudy
|
68°F |
6 mph
SE
|
|
Wednesday
Aug 5
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
85°F |
5 mph
S
|
|
Wednesday Night
Aug 5
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
68°F |
8 mph
E
|
|
Thursday
Aug 6
|
Showers And Thunderstorms
|
83°F |
5 mph
NE
|
|
Thursday Night
Aug 6
|
Partly Cloudy then Slight Chance Rain Showers
|
66°F |
5 mph
E
|
|
Friday
Aug 7
|
Slight Chance Rain Showers
|
85°F |
5 mph
S
|
|
Friday Night
Aug 7
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
68°F |
3 mph
S
|
|
Saturday
Aug 8
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
88°F |
6 mph
S
|
|
Saturday Night
Aug 8
|
Mostly Clear
|
70°F |
7 mph
S
|
|
Sunday
Aug 9
|
Mostly Sunny
|
90°F |
10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mendon.
