Harmon, IL Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Harmon, IL in one place.
Mostly cloudy. Low around 36, with temperatures rising to around 38 overnight. North northwest wind around 10 mph, with gusts as high as 20 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: Nov 6, 2026 4:19 AM CST.
The active forecast window currently covers Nov 6 to Nov 12, 2026 for Harmon, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 6 to Nov 12, 2026
- Latest sync
- Nov 6, 2026 4:19 AM CST
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Harmon
Monday looks like the warmest upcoming period in Harmon at 64 degrees F.
Friday Night is the coolest period ahead with temperatures near 29 degrees F.
The strongest winds are forecast for Friday at about 5 to 15 mph NNW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Nov 6, 2026 4:19 AM CST
- Coverage
- 7 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
Mostly sunny. High near 46, with temperatures falling to around 42 in the afternoon. North northwest wind 5 to 15 mph.
Mostly clear, with a low around 29. North northwest wind 0 to 5 mph, with gusts as high as 15 mph.
Mostly sunny, with a high near 50. West wind 0 to 5 mph, with gusts as high as 10 mph.
Mostly clear, with a low around 34. West southwest wind around 5 mph, with gusts as high as 15 mph.
Sunny, with a high near 59.
Mostly clear, with a low around 35.
Sunny, with a high near 64.
Mostly clear, with a low around 40.
Sunny, with a high near 60.
Partly cloudy, with a low around 36.
Mostly sunny, with a high near 58.
Partly cloudy, with a low around 37.
A slight chance of rain before noon. Mostly sunny, with a high near 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Nov 6
|
Mostly Cloudy
|
36°F |
10 mph
NNW
|
|
Friday
Nov 6
|
Mostly Sunny
|
46°F |
5 to 15 mph
NNW
|
|
Friday Night
Nov 6
|
Mostly Clear
|
29°F |
0 to 5 mph
NNW
|
|
Saturday
Nov 7
|
Mostly Sunny
|
50°F |
0 to 5 mph
W
|
|
Saturday Night
Nov 7
|
Mostly Clear
|
34°F |
5 mph
WSW
|
|
Sunday
Nov 8
|
Sunny
|
59°F |
5 to 10 mph
W
|
|
Sunday Night
Nov 8
|
Mostly Clear
|
35°F |
0 to 5 mph
W
|
|
Monday
Nov 9
|
Sunny
|
64°F |
0 to 10 mph
SSW
|
|
Monday Night
Nov 9
|
Mostly Clear
|
40°F |
0 to 5 mph
WSW
|
|
Tuesday
Nov 10
|
Sunny
|
60°F |
0 to 5 mph
WNW
|
|
Tuesday Night
Nov 10
|
Partly Cloudy
|
36°F |
0 mph
|
|
Veterans Day
Nov 11
|
Mostly Sunny
|
58°F |
0 to 5 mph
NNW
|
|
Wednesday Night
Nov 11
|
Partly Cloudy
|
37°F |
0 mph
|
|
Thursday
Nov 12
|
Slight Chance Rain then Mostly Sunny
|
54°F |
0 to 5 mph
NNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harmon.