Hermon, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Hermon, IL in one place.
Showers and thunderstorms likely between 7am and 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. West wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Hermon, 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 14, 2026 2:11 PM CDT.
The active forecast window currently covers Sep 15 to Sep 20, 2026 for Hermon, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 20, 2026
- Latest sync
- Sep 14, 2026 2:11 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Hermon
Tuesday looks like the warmest upcoming period in Hermon at 85 degrees F.
Sunday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Saturday at about 6 to 10 mph SW.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 2:11 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms. Mostly cloudy, with a low around 64. North northeast wind 3 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 82. East northeast wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
A chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. East southeast wind around 3 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83. West northwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
A chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.
A chance of rain showers. Partly cloudy, with a low around 66.
A chance of rain showers. Mostly sunny, with a high near 81.
A chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
A chance of showers and thunderstorms. Partly sunny, with a high near 77.
A chance of rain showers. Mostly cloudy, with a low around 61.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Showers And Thunderstorms Likely
|
85°F |
8 mph
W
|
|
Tuesday Night
Sep 15
|
Showers And Thunderstorms
|
64°F |
3 to 8 mph
NNE
|
|
Wednesday
Sep 16
|
Showers And Thunderstorms
|
82°F |
6 mph
ENE
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
68°F |
3 mph
ESE
|
|
Thursday
Sep 17
|
Chance Showers And Thunderstorms
|
83°F |
5 mph
WNW
|
|
Thursday Night
Sep 17
|
Mostly Cloudy then Chance Rain Showers
|
67°F |
3 mph
NE
|
|
Friday
Sep 18
|
Chance Showers And Thunderstorms
|
83°F |
3 to 7 mph
ESE
|
|
Friday Night
Sep 18
|
Chance Rain Showers
|
66°F |
6 mph
SE
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
81°F |
6 to 10 mph
SW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
63°F |
8 mph
N
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
77°F |
8 mph
ENE
|
|
Sunday Night
Sep 20
|
Chance Rain Showers
|
61°F |
3 to 7 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Hermon.