National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Lansing Municipal Airport (KIGQ)

Lat: 41.54°NLon: 87.53°WElev: 607ft.

Fair

62°F

17°C

Humidity 87%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 29 Aug 3:35 am CDT
Extended Forecast for

Posen IL

  • Overnight

    Overnight: Partly cloudy, with a low around 64. South wind around 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of sprinkles after 5pm. Partly sunny, with a high near 81. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 81 °F

    Slight Chance
    Sprinkles

  • Saturday Night

    Saturday Night: A slight chance of sprinkles before 8pm. Mostly cloudy, with a low around 69. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Slight Chance
    Sprinkles

  • Sunday

    Sunday: A 20 percent chance of showers before 9am. Partly sunny, with a high near 87. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 87 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 72. South southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 72 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 90.

    High: 90 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 64. South wind around 5 mph.
Saturday
A slight chance of sprinkles after 5pm. Partly sunny, with a high near 81. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
A slight chance of sprinkles before 8pm. Mostly cloudy, with a low around 69. South wind around 10 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of showers before 9am. Partly sunny, with a high near 87. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 72. South southwest wind around 10 mph, with gusts as high as 15 mph.
Monday
Partly sunny, with a high near 90.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
Sunny, with a high near 91.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 73.
Thursday
Mostly sunny, with a high near 87.
Thursday Night
A chance of showers. Partly cloudy, with a low around 70.
Friday
Partly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Posen IL
 41.64°N 87.69°W
Last Update:
2:46 am CDT Aug 29, 2026
Forecast Valid:
3am CDT Aug 29, 2026-6pm CDT Sep 4, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation