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May 19th, 2026 :: 11:17 pm CDT   

Local Weather Report for
Harrisburg
Illinois, United States

 Current Harrisburg Weather Conditions Updated May 19th at 9:55 pm 
Mostly Cloudy
Temperature:75°F Dew Point:70°F
Barometer:30.09 inHg Wind:N 13 Mph
Humidity:83.3% Visibility:0M
 
 Harrisburg Weather Forecast Summary  
 
Today
May 19th
Wednesday
May 20th
Thursday
May 21st
Friday
May 22nd
Saturday
May 23rd
Thundershowers Showers Mostly Cloudy Mostly Cloudy with Showers Thundershowers
85°F
65°F
63°F
64°F
55°F
72°F
55°F
78°F
64°F
 
 Harrisburg Detailed Weather Forecast  
 
Wednesday, May 20th, 2026
Overnight Temperature: 64°F
Cloudy with a few showers. Windy at times.
Morning Temperature: 63°F
Cloudy with a slight chance of showers. Windy at times.
Afternoon Temperature: 64°F
Mostly cloudy. Windy at times.
Evening Temperature: 63°F
Cloudy. Windy at times.
Thursday, May 21st, 2026
Overnight Temperature: 59°F
Mostly cloudy with a slight chance of showers.
Morning Temperature: 60°F
Mostly cloudy. Windy at times.
Afternoon Temperature: 62°F
Cloudy with sunny periods. Windy at times.
Evening Temperature: 56°F
Cloudy. Windy at times.
Friday, May 22nd, 2026
Overnight Temperature: 56°F
Cloudy with a few showers. Windy at times.
Morning Temperature: 59°F
Cloudy with a few showers.
Afternoon Temperature: 71°F
Sunny with cloudy periods with showers likely. Slight chance of a thunderstorm.
Evening Temperature: 67°F
A mix of cloudy and clear skies with showers likely.
Saturday, May 23rd, 2026
Overnight Temperature: 65°F
Mostly cloudy.
Morning Temperature: 69°F
A mix of cloud and sun. Chance of a thunderstorm.
Afternoon Temperature: 76°F
A mix of sun and cloud with a slight chance of showers or thundershowers. Windy at times.
Evening Temperature: 73°F
Clear with cloudy periods with showers likely. Chance of a thunderstorm.
Sunday, May 24th, 2026
Overnight Temperature: 67°F
Cloudy with a few showers.
Morning Temperature: 68°F
Cloudy with a chance of showers.
Afternoon Temperature: 73°F
Cloudy with sunny periods. Slight chance of a thunderstorm.
Evening Temperature: 68°F
Mostly cloudy.
Monday, May 25th, 2026
Overnight Temperature: 66°F
Cloudy with showers likely.
Morning Temperature: 69°F
A mix of cloud and sun with showers likely. Windy at times.
Afternoon Temperature: 76°F
A mix of cloud and sun with a chance of showers or thundershowers. Windy at times.
Evening Temperature: 74°F
A mix of cloudy and clear skies with showers likely. Chance of a thunderstorm. Windy at times.
Tuesday, May 26th, 2026
Overnight Temperature: 68°F
Mostly clear with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Morning Temperature: 72°F
A mix of cloud and sun with a chance of showers or thundershowers. Windy at times.
Afternoon Temperature: 78°F
A mix of cloud and sun with a chance of showers or thundershowers. Windy.
Evening Temperature: 73°F
Mostly clear with showers likely. Chance of a thunderstorm. Windy at times.
Wednesday, May 27th, 2026
Overnight Temperature: 67°F
Mostly clear with showers likely.
Morning Temperature: 72°F
Sunny. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 84°F
Mostly sunny with a chance of showers or thundershowers. Windy at times.
Evening Temperature: 75°F
Mostly clear with showers likely. Chance of a thunderstorm. Windy at times.





 

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9:55 PM  75°F
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This WeatherCity Weather Forecast for Harrisburg, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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