Harrison, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Harrison, IL in one place.
Sunny, with a high near 80. South wind 6 to 15 mph, with gusts as high as 23 mph.
Local Weather Overview
This forecast page for Harrison, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 21, 2026 10:01 PM CDT.
The active forecast window currently covers Apr 23 to Apr 28, 2026 for Harrison, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 23 to Apr 28, 2026
- Latest sync
- Apr 21, 2026 10:01 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Harrison
Thursday looks like the warmest upcoming period in Harrison at 80 degrees F.
Saturday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Thursday at about 6 to 15 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 21, 2026 10:01 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KPAH
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. South wind around 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Showers and thunderstorms. Mostly cloudy, with a high near 76. South southwest wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly cloudy, with a low around 57. West northwest wind 2 to 7 mph.
A chance of rain showers. Mostly sunny, with a high near 77. North wind around 7 mph.
A slight chance of rain showers. Partly cloudy, with a low around 54. Northeast wind around 6 mph.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 78. East wind 5 to 8 mph.
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 60. Southeast wind 7 to 10 mph, with gusts as high as 18 mph.
Showers and thunderstorms likely. Partly sunny, with a high near 79. South wind 10 to 14 mph, with gusts as high as 22 mph.
Showers and thunderstorms likely. Partly cloudy, with a low around 54. West southwest wind 7 to 12 mph, with gusts as high as 18 mph.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 74. West northwest wind 7 to 10 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 23
|
Sunny
|
80°F |
6 to 15 mph
S
|
|
Thursday Night
Apr 23
|
Partly Cloudy then Chance Showers And Thunderstorms
|
62°F |
13 mph
S
|
|
Friday
Apr 24
|
Showers And Thunderstorms
|
76°F |
8 to 13 mph
SSW
|
|
Friday Night
Apr 24
|
Showers And Thunderstorms
|
57°F |
2 to 7 mph
WNW
|
|
Saturday
Apr 25
|
Chance Rain Showers
|
77°F |
7 mph
N
|
|
Saturday Night
Apr 25
|
Slight Chance Rain Showers
|
54°F |
6 mph
NE
|
|
Sunday
Apr 26
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
78°F |
5 to 8 mph
E
|
|
Sunday Night
Apr 26
|
Slight Chance Showers And Thunderstorms
|
60°F |
7 to 10 mph
SE
|
|
Monday
Apr 27
|
Showers And Thunderstorms Likely
|
79°F |
10 to 14 mph
S
|
|
Monday Night
Apr 27
|
Showers And Thunderstorms Likely
|
54°F |
7 to 12 mph
WSW
|
|
Tuesday
Apr 28
|
Slight Chance Rain Showers then Mostly Sunny
|
74°F |
7 to 10 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harrison.