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Harper, Illinois Weather Forecast
Harper, Illinois Weather
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Weather Forecast for Harper, Illinois : White County
Issued: 1:46 am CST Dec 21, 2025 Latitude: 38.1839356 Longitude: -88.0425337 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Christmas Day Friday Saturday
Mostly Cloudy on Overnight Sunny on Sunday 20% chance of rain on Monday Partly Sunny on Tuesday Cloudy on Wednesday Mostly Cloudy on Christmas Day Partly Sunny on Friday Mostly Cloudy on Saturday
Low: 33°F High: 42°F High: 52°F High: 62°F High: 64°F High: 69°F High: 62°F High: 57°F
Low: 29°F Low: 47°F Low: 45°F Low: 58°F Low: 54°F Low: 43°F  
Mostly Cloudy Sunny Rain Partly Sunny Cloudy Mostly Cloudy Partly Sunny Mostly Cloudy
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Current Conditions at
FAIRFIELD MUNICIPAL ARPT - (KFWC)
34°
Clear
as of 2:35 AM CST
Rel. Humidity: 59%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.31 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
EVANSVILLE - (KEVV)
36°
Clear
as of 1:54 AM CST
Rel. Humidity: 59%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
HENDERSON CITY - (KEHR)
37°
Clear
as of 1:56 AM CST
Rel. Humidity: 55%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
3 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
MOUNT CARMEL MUNI - (KAJG)
34°
Clear
as of 2:35 AM CST
Rel. Humidity: 64%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.31 in.
Flight Rule: VFR
Wind Data
3 MPH
320° Northwest
Cloud Level(s): Clear
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a steady temperature around 33. Light north wind.

Sunny on Sunday Sunday... Sunny, with a high near 42. Light and variable wind becoming north northeast 5 to 7 mph in the morning.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 29. Light and variable wind becoming southeast around 6 mph after midnight.

20% chance of rain Monday Monday... A 20 percent chance of rain after noon. Increasing clouds, with a high near 52. South wind 6 to 9 mph.

50% chance of rain Monday Night Monday Night... A 50 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 47. Southwest wind 6 to 8 mph.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 62. West southwest wind 5 to 8 mph becoming calm in the afternoon.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 45. Light and variable wind.

Cloudy on Wednesday Wednesday... Cloudy, with a high near 64. East southeast wind 5 to 10 mph becoming south in the afternoon.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 58. Southwest wind around 10 mph, with gusts as high as 20 mph.

Mostly Cloudy on Christmas Day Christmas Day... Mostly cloudy, with a high near 69. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 54. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.

Partly Sunny on Friday Friday... Partly sunny, with a high near 62. West wind 6 to 9 mph becoming north in the afternoon.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 43. North wind around 6 mph becoming southeast after midnight.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 57. South southwest wind around 7 mph.

Current Radar Image


Sun Almanac for Harper, Illinois
Sunrise: 07:05 AM
Sunset: 4:36 PM
Civil Sunrise:06:36 AM
Civil Sunset: 5:05 PM
Nautical Sunrise: 06:03 AM
Nautical Sunset: 5:38 PM
Astro Sunrise: 05:30 AM
Astro Sunset: 6:11 PM
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