Mendon, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Mendon, IL in one place.
Mostly sunny, with a high near 82. West wind around 5 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: Jun 18, 2026 12:20 PM CDT.
The active forecast window currently covers Jun 19 to Jun 24, 2026 for Mendon, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 19 to Jun 24, 2026
- Latest sync
- Jun 18, 2026 12:20 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Mendon
Saturday looks like the warmest upcoming period in Mendon at 83 degrees F.
Sunday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Sunday Night at about 13 to 16 mph N.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 18, 2026 12:20 PM CDT
- Coverage
- 6 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
Partly cloudy, with a low around 64. South wind around 5 mph.
Mostly sunny, with a high near 83. Southwest wind around 5 mph.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 90%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 74. Chance of precipitation is 20%.
Partly cloudy, with a low around 58.
Sunny, with a high near 77.
Partly cloudy, with a low around 61.
Mostly sunny, with a high near 80.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Juneteenth
Jun 19
|
Mostly Sunny
|
82°F |
5 mph
W
|
|
Friday Night
Jun 19
|
Partly Cloudy
|
64°F |
5 mph
S
|
|
Saturday
Jun 20
|
Mostly Sunny
|
83°F |
5 mph
SW
|
|
Saturday Night
Jun 20
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
66°F |
6 to 10 mph
SE
|
|
Sunday
Jun 21
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
77°F |
10 to 15 mph
E
|
|
Sunday Night
Jun 21
|
Showers And Thunderstorms
|
58°F |
13 to 16 mph
N
|
|
Monday
Jun 22
|
Slight Chance Rain Showers then Mostly Sunny
|
74°F |
9 to 13 mph
N
|
|
Monday Night
Jun 22
|
Partly Cloudy
|
58°F |
5 to 9 mph
NE
|
|
Tuesday
Jun 23
|
Sunny
|
77°F |
5 mph
E
|
|
Tuesday Night
Jun 23
|
Partly Cloudy
|
61°F |
3 mph
SE
|
|
Wednesday
Jun 24
|
Mostly Sunny
|
80°F |
7 mph
W
|
|
Wednesday Night
Jun 24
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
63°F |
6 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mendon.
