Harmon, Illinois Weather
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Weather Forecast for Harmon, Illinois : Lee County
Issued: 4:26 am CDT Jun 2, 2025 Latitude: 41.722811 Longitude: -89.5539905 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Mostly Sunny on This Afternoon Cloudy on Tonight 70% chance of thunderstorms on Tuesday 60% chance of thunderstorms on Wednesday 20% chance of rain on Thursday 20% chance of rain on Friday Mostly Sunny on Saturday 20% chance of rain on Sunday
High: 86°F Low: 67°F High: 82°F High: 69°F High: 76°F High: 77°F High: 78°F High: 79°F
Low: 59°F Low: 55°F Low: 57°F Low: 55°F Low: 57°F  
Mostly Sunny Cloudy Thunderstorms Thunderstorms Rain Rain Mostly Sunny Rain
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Current Conditions at
ROCHELLE MUNICIPAL ARPT - (KRPJ)
81°
Clear
as of 12:35 PM CDST
Rel. Humidity: 22%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 22 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
PERU - (KVYS)
82°
Clear
as of 12:35 PM CDST
Rel. Humidity: 26%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 20 MPH
180° South
Cloud Level(s): Clear
Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 86. South wind 10 to 15 mph, with gusts as high as 20 mph.
Cloudy on Tonight Tonight... Partly cloudy, with a low around 67. South wind 10 to 15 mph.
70% chance of thunderstorms Tuesday Tuesday... A chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Increasing clouds, with a high near 82. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
90% chance of thunderstorms Tuesday Night Tuesday Night... Showers and possibly a thunderstorm. Low around 59. Southwest wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
60% chance of thunderstorms Wednesday Wednesday... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. North northeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
30% chance of rain Wednesday Night Wednesday Night... A 30 percent chance of showers. Partly cloudy, with a low around 55.
20% chance of rain Thursday Thursday... A 20 percent chance of showers. Mostly cloudy, with a high near 76.
20% chance of rain Thursday Night Thursday Night... A chance of showers after 1am. Mostly cloudy, with a low around 57.
20% chance of rain Friday Friday... A chance of showers. Mostly sunny, with a high near 77.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 55.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 78.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 57.
20% chance of rain Sunday Sunday... A chance of showers. Mostly sunny, with a high near 79.
Sun Almanac for Harmon, Illinois
Sunrise: 05:25 AM
Sunset: 8:27 PM
Civil Sunrise:04:52 AM
Civil Sunset: 9:01 PM
Nautical Sunrise: 04:09 AM
Nautical Sunset: 9:44 PM
Astro Sunrise: 03:19 AM
Astro Sunset: 10:34 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.