Altmar, Illinois Weather
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Weather Forecast for Altmar, Illinois : LaSalle County
Issued: 9:07 pm CDT Jun 21, 2025 Latitude: 41.1419781 Longitude: -88.8925765 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Clear on Tonight Sunny on Sunday Sunny on Monday 30% chance of thunderstorms on Tuesday 20% chance of thunderstorms on Wednesday 20% chance of thunderstorms on Thursday 20% chance of thunderstorms on Friday 20% chance of thunderstorms on Saturday
Low: 76°F High: 94°F High: 95°F High: 93°F High: 92°F High: 91°F High: 87°F High: 88°F
Low: 75°F Low: 74°F Low: 72°F Low: 73°F Low: 71°F Low: 69°F  
Clear Sunny Sunny Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
PERU - (KVYS)
86°
Feels like 95°F
Clear
as of 8:35 PM CDST
Rel. Humidity: 70%
Dew Point: 75°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: VFR
Wind Data
9 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
88°
Feels like 95°F
Clear
as of 8:35 PM CDST
Rel. Humidity: 62%
Dew Point: 73°F
Visibility: 10 Miles
Pressure: 29.87 in.
Flight Rule: VFR
Wind Data
13 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
LACON/MARSHALL COUNTY - (KC75)
86°
Feels like 93°F
Clear
as of 8:35 PM CDST
Rel. Humidity: 66%
Dew Point: 73°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: VFR
Wind Data
12 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
86°
Feels like 95°F
Clear
as of 8:35 PM CDST
Rel. Humidity: 70%
Dew Point: 75°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: VFR
Wind Data
10 MPH
210° Southwest
Cloud Level(s): Clear
Clear on Tonight Tonight... Clear, with a low around 76. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

Sunny on Sunday Sunday... Sunny, with a high near 94. Heat index values as high as 106. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.

Clear on Sunday Night Sunday Night... Clear, with a low around 75. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Sunny on Monday Monday... Sunny and hot, with a high near 95. Heat index values as high as 101. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

20% chance of thunderstorms Monday Night Monday Night... A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

30% chance of thunderstorms Tuesday Tuesday... A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93.

30% chance of thunderstorms Tuesday Night Tuesday Night... A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

20% chance of thunderstorms Wednesday Wednesday... A chance of showers and thunderstorms. Mostly sunny, with a high near 92.

20% chance of thunderstorms Wednesday Night Wednesday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 73.

20% chance of thunderstorms Thursday Thursday... A chance of showers and thunderstorms. Mostly sunny, with a high near 91.

20% chance of thunderstorms Thursday Night Thursday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 71.

20% chance of thunderstorms Friday Friday... A chance of showers and thunderstorms. Mostly sunny, with a high near 87.

20% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 69.

20% chance of thunderstorms Saturday Saturday... A chance of showers and thunderstorms. Mostly sunny, with a high near 88.

Current Radar Image


Sun Almanac for Altmar, Illinois
Sunrise: 05:23 AM
Sunset: 8:32 PM
Civil Sunrise:04:49 AM
Civil Sunset: 9:06 PM
Nautical Sunrise: 04:06 AM
Nautical Sunset: 9:49 PM
Astro Sunrise: 03:15 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.