Harper, Illinois Weather
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Weather Forecast for Harper, Illinois : Ogle County
Issued: 3:41 am CDT Jun 4, 2025 Latitude: 42.1414135 Longitude: -89.6473371 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
70% chance of rain on Overnight 60% chance of rain on Wednesday Mostly Sunny on Thursday 20% chance of rain on Friday Mostly Sunny on Saturday 20% chance of rain on Sunday Sunny on Monday Mostly Sunny on Tuesday
Low: 59°F High: 71°F High: 76°F High: 76°F High: 76°F High: 78°F High: 73°F High: 74°F
Low: 55°F Low: 56°F Low: 55°F Low: 56°F Low: 55°F Low: 51°F  
Rain Rain Mostly Sunny Rain Mostly Sunny Rain Sunny Mostly Sunny
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Current Conditions at
ROCHELLE MUNICIPAL ARPT - (KRPJ)
64°
Cloudy
Light Rain
as of 5:15 AM CDST
Rel. Humidity: 100%
Dew Point: 64°F
Visibility: 3 Miles
Pressure: 29.89 in.
Flight Rule: MVFR
Wind Data
6 MPH
250° West
Cloud Level(s): Scattered at 600ft, Solid Overcast at 1400ft
70% chance of rain Overnight Overnight... Rain likely. Cloudy, with a low around 59. North wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

60% chance of rain Wednesday Wednesday... Rain likely, mainly before 9am. Patchy smoke after noon. Cloudy, then gradually becoming mostly sunny, with a high near 71. North wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Smoke on Wednesday Night Wednesday Night... Patchy smoke. Partly cloudy, with a low around 55. North wind around 5 mph.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 76. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 56. East northeast wind around 5 mph, with gusts as high as 10 mph.

20% chance of rain Friday Friday... A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 76.

20% chance of thunderstorms Friday Night Friday Night... A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 76.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 56.

20% chance of rain Sunday Sunday... A chance of showers. Mostly sunny, with a high near 78.

20% chance of rain Sunday Night Sunday Night... A chance of showers. Partly cloudy, with a low around 55.

Sunny on Monday Monday... Sunny, with a high near 73.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 51.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 74.

Current Radar Image


Sun Almanac for Harper, Illinois
Sunrise: 05:24 AM
Sunset: 8:30 PM
Civil Sunrise:04:50 AM
Civil Sunset: 9:04 PM
Nautical Sunrise: 04:06 AM
Nautical Sunset: 9:48 PM
Astro Sunrise: 03:14 AM
Astro Sunset: 10:40 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.