Forecast for St. Charles, IL | Forecast Periods: 14
Monday
Mar 16
2026
St. Charles, IL
Updated: 2:41 PM CDT
25°F
Snow Showers Likely And Patchy Blowing Snow
25 mph NW
Precipitation: 61%
Snow showers likely and patchy blowing snow. Cloudy. High near 25, with temperatures falling to around 23 in the afternoon. Northwest wind around 25 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than half an inch possible.
Hourly Forecast
Extended Forecast
Tonight
Mon, Mar 16
5°F
Chance Snow Showers And Patchy Blowing Snow then Patchy Blowing Snow
10 mph WNW
Precipitation: 26%
A chance of snow showers and patchy blowing snow before 7pm, then patchy blowing snow and a slight chance of snow showers between 7pm and 2am. Mostly cloudy. Low around 5, 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 30%. 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 -9. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Tue, Mar 17
20°F
Snow
5 mph SSW
Precipitation: 88%
Snow after 7pm. Cloudy, with a low around 20. South southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of around one inch possible.
Wednesday
Wed, Mar 18
41°F
Snow then Partly Sunny
10 mph SSW
Precipitation: 85%
Snow before 7am. Partly sunny, with a high near 41. South southwest wind 10 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
31°F
Mostly Cloudy
5 mph SW
Precipitation: 9%
Mostly cloudy, with a low around 31.
Thursday
Thu, Mar 19
50°F
Mostly Sunny
5 mph WSW
Precipitation: 10%
Mostly sunny, with a high near 50.
Thursday Night
Thu, Mar 19
36°F
Mostly Cloudy
5 mph NW
Precipitation: 2%
Mostly cloudy, with a low around 36.
Friday
Fri, Mar 20
59°F
Partly Sunny
5 mph WSW
Precipitation: 1%
Partly sunny, with a high near 59.
Friday Night
Fri, Mar 20
39°F
Mostly Cloudy
10 mph W
Precipitation: 3%
Mostly cloudy, with a low around 39.
Saturday
Sat, Mar 21
61°F
Partly Sunny
10 mph W
Precipitation: 3%
Partly sunny, with a high near 61.
Saturday Night
Sat, Mar 21
38°F
Partly Cloudy
10 mph NW
Precipitation: 8%
Partly cloudy, with a low around 38.
Sunday
Sun, Mar 22
55°F
Partly Sunny
10 mph NNW
Precipitation: 8%
Partly sunny, with a high near 55.
Sunday Night
Sun, Mar 22
29°F
Mostly Cloudy
10 mph N
Precipitation: 3%
Mostly cloudy, with a low around 29.