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August 11, 2026: Derecho produces widespread wind damage and tornadoes across northern Illinois and northwest Indiana
Interactive map of preliminary storm reports from this week's severe weather and flooding
NOAA All Hazards Radio Test Postponed

Hazardous Weather Conditions

Current conditions at

Aurora Municipal Airport (KARR)

Lat: 41.77°NLon: 88.48°WElev: 696ft.

Fog

64°F

18°C

Humidity	100%
Wind Speed	Calm
Barometer	29.89 in (1011.9 mb)
Dewpoint	64°F (18°C)
Visibility	0.25 mi
Last update	13 Aug 3:52 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Montgomery IL

Dense Fog Advisory until August 13, 09:00am

Click here for hazard details and duration

Dense Fog Advisory

Dense Fog Advisory until August 13, 09:00am
NOW until 9:00am Thu
Dense Fog Advisory
Overnight
Low: 66 °F
Areas Dense
Fog
Thursday
High: 80 °F
Dense Fog
then Showers
Likely
Thursday Night
Low: 67 °F
Showers
Likely
Friday
High: 81 °F
Showers
Likely then
Chance
Showers
Friday Night
Low: 68 °F
Chance
T-storms then
Showers
Likely
Saturday
High: 85 °F
Showers
Likely
Saturday Night
Low: 72 °F
Chance
T-storms
Sunday
High: 84 °F
Mostly Cloudy
then Chance
T-storms

Detailed Forecast

Overnight

Areas of dense fog. Otherwise, partly cloudy, with a low around 66. Calm wind.

Thursday

A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm. Widespread dense fog, mainly before 9am. Otherwise, mostly cloudy, with a high near 80. East wind 5 to 10 mph becoming south southeast in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers likely and possibly a thunderstorm. Cloudy, with a low around 67. East wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

Friday

Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 81. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.

Friday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.

Saturday

Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.

Saturday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

Sunday

A chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 84.

Sunday Night

Mostly cloudy, with a low around 66.

Monday

Mostly sunny, with a high near 80.

Monday Night

Mostly clear, with a low around 60.

Tuesday

Mostly sunny, with a high near 80.