Harmon, IL Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Harmon, IL in one place.
Partly sunny, with a high near 80. South southeast wind 0 to 10 mph.
Local Weather Overview
This forecast page for Harmon, 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 23, 2026 1:19 PM CDT.
The active forecast window currently covers Jul 24 to Jul 29, 2026 for Harmon, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 24 to Jul 29, 2026
- Latest sync
- Jul 23, 2026 1:19 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Harmon
Monday looks like the warmest upcoming period in Harmon at 94 degrees F.
Friday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Monday at about 10 to 15 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 23, 2026 1:19 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KDVN
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 60. South wind around 5 mph, with gusts as high as 15 mph.
Partly sunny, with a high near 84. South southwest wind around 5 mph, with gusts as high as 15 mph.
Mostly clear, with a low around 68.
Mostly sunny, with a high near 92.
Partly cloudy, with a low around 72.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 94.
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 70.
Sunny, with a high near 89.
Partly cloudy, with a low around 65.
Sunny, with a high near 87.
Mostly clear, with a low around 65.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 24
|
Partly Sunny
|
80°F |
0 to 10 mph
SSE
|
|
Friday Night
Jul 24
|
Partly Cloudy
|
60°F |
5 mph
S
|
|
Saturday
Jul 25
|
Partly Sunny
|
84°F |
5 mph
SSW
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
68°F |
0 to 5 mph
SW
|
|
Sunday
Jul 26
|
Mostly Sunny
|
92°F |
0 to 5 mph
SW
|
|
Sunday Night
Jul 26
|
Partly Cloudy
|
72°F |
5 to 10 mph
SSW
|
|
Monday
Jul 27
|
Slight Chance Rain Showers
|
94°F |
10 to 15 mph
SW
|
|
Monday Night
Jul 27
|
Slight Chance Showers And Thunderstorms
|
70°F |
5 to 10 mph
NW
|
|
Tuesday
Jul 28
|
Sunny
|
89°F |
5 to 10 mph
N
|
|
Tuesday Night
Jul 28
|
Partly Cloudy
|
65°F |
0 to 5 mph
NE
|
|
Wednesday
Jul 29
|
Sunny
|
87°F |
0 to 5 mph
NNE
|
|
Wednesday Night
Jul 29
|
Mostly Clear
|
65°F |
0 to 5 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harmon.