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Piatt, Illinois Weather Forecast
Piatt, Illinois Weather
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Weather Forecast for Piatt, Illinois : Piatt County
Issued: 1:11 pm CST Dec 17, 2025 Latitude: 39.9330887 Longitude: -88.5203392 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Thursday Friday Saturday Sunday Monday Tuesday
Mostly Sunny on This Afternoon 30% chance of rain on Tonight 100% chance of rain on Thursday Sunny on Friday Partly Sunny on Saturday Sunny on Sunday Partly Sunny on Monday Partly Sunny on Tuesday
High: 42°F Low: 47 °F High: 50 °F High: 31°F High: 47°F High: 36°F High: 42°F High: 51°F
Low: 16°F Low: 24°F Low: 21°F Low: 24°F Low: 34°F  
Mostly Sunny Rain Rain Sunny Partly Sunny Sunny Partly Sunny Partly Sunny
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Current Conditions at
CHAMPAIGN - (KCMI)
37°
Clear
as of 1:53 PM CST
Rel. Humidity: 86%
Dew Point: 34°F
Visibility: 8 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
5 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
DECATUR - (KDEC)
39°
Clear
as of 1:54 PM CST
Rel. Humidity: 80%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
8 MPH
120° Southeast
Cloud Level(s): Clear
Current Conditions at
RANTOUL - (KTIP)
39°
Clear
as of 2:15 PM CST
Rel. Humidity: 75%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
3 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
MATTOON - (KMTO)
45°
Clear
as of 1:53 PM CST
Rel. Humidity: 65%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 42. East wind 5 to 7 mph.

30% chance of rain Tonight Tonight... A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a temperature rising to around 47 by 5am. Breezy, with a south wind 9 to 14 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 34 mph.

100% chance of rain Thursday Thursday... Showers, mainly before 3pm. Temperature rising to near 50 by 8am, then falling to around 39 during the remainder of the day. Breezy, with a south wind 18 to 24 mph becoming west in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

30% chance of rain & snow Thursday Night Thursday Night... A chance of rain showers before 7pm, then a chance of snow showers between 7pm and midnight. Mostly cloudy, with a low around 16. Wind chill values between -1 and 9. Breezy, with a west wind 17 to 25 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.

Sunny on Friday Friday... Sunny, with a high near 31. Blustery, with a west northwest wind 17 to 22 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 28 mph.

Increasing Clouds on Friday Night Friday Night... Increasing clouds, with a low around 24. Breezy, with a south wind 10 to 20 mph, with gusts as high as 26 mph.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 47. Breezy, with a south wind 13 to 20 mph becoming west in the afternoon. Winds could gust as high as 28 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 21.

Sunny on Sunday Sunday... Sunny, with a high near 36.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 24.

Partly Sunny on Monday Monday... Partly sunny, with a high near 42.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 34.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 51.

Current Radar Image


Sun Almanac for Piatt, Illinois
Sunrise: 07:10 AM
Sunset: 4:31 PM
Civil Sunrise:06:40 AM
Civil Sunset: 5:01 PM
Nautical Sunrise: 06:06 AM
Nautical Sunset: 5:35 PM
Astro Sunrise: 05:33 AM
Astro Sunset: 6:08 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.