Forecast for DeKalb, IL | Forecast Periods: 14
Monday
Mar 16
2026
DeKalb, IL
Updated: 3:57 PM CDT
26°F
Chance Snow Showers And Patchy Blowing Snow
20 mph NW
Precipitation: 31%
A chance of snow showers and patchy blowing snow. Cloudy. High near 26, with temperatures falling to around 22 in the afternoon. Northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 30%. New snow accumulation of less than half an inch possible.
Hourly Forecast
Extended Forecast
Tonight
Mon, Mar 16
4°F
Patchy Blowing Snow
10 mph WNW
Precipitation: 22%
Patchy blowing snow and a slight chance of snow showers before 2am. Mostly cloudy. Low around 4, with temperatures rising to around 7 overnight. Wind chill values as low as -9. West northwest wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 20%. New snow accumulation of less than half an inch possible.
Tuesday
Tue, Mar 17
23°F
Mostly Sunny
5 mph W
Precipitation: 1%
Mostly sunny, with a high near 23. Wind chill values as low as -10. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Tue, Mar 17
19°F
Snow
5 mph S
Precipitation: 89%
Snow after 7pm. Cloudy, with a low around 19. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Wednesday
Wed, Mar 18
38°F
Snow then Partly Sunny
5 mph SSW
Precipitation: 85%
Snow before 7am. Partly sunny, with a high near 38. South southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of less than half an inch possible.
Wednesday Night
Wed, Mar 18
30°F
Mostly Cloudy
5 mph SW
Precipitation: 9%
Mostly cloudy, with a low around 30.
Thursday
Thu, Mar 19
47°F
Mostly Sunny
5 mph W
Precipitation: 9%
Mostly sunny, with a high near 47.
Thursday Night
Thu, Mar 19
34°F
Mostly Cloudy
5 mph SE
Precipitation: 1%
Mostly cloudy, with a low around 34.
Friday
Fri, Mar 20
57°F
Partly Sunny
5 mph WSW
Precipitation: 0%
Partly sunny, with a high near 57.
Friday Night
Fri, Mar 20
38°F
Mostly Cloudy
10 mph WSW
Precipitation: 3%
Mostly cloudy, with a low around 38.
Saturday
Sat, Mar 21
61°F
Mostly Sunny
10 mph WSW
Precipitation: 3%
Mostly sunny, with a high near 61.
Saturday Night
Sat, Mar 21
37°F
Partly Cloudy
10 mph NW
Precipitation: 8%
Partly cloudy, with a low around 37.
Sunday
Sun, Mar 22
55°F
Partly Sunny
15 mph NNW
Precipitation: 8%
Partly sunny, with a high near 55.
Sunday Night
Sun, Mar 22
28°F
Mostly Cloudy
10 mph N
Precipitation: 2%
Mostly cloudy, with a low around 28.