Harrison, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Harrison, IL in one place.
Showers and thunderstorms. Mostly cloudy, with a high near 85. South wind 6 to 9 mph. Chance of precipitation is 90%.
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: Jun 7, 2026 1:47 AM CDT.
The active forecast window currently covers Jun 8 to Jun 13, 2026 for Harrison, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 8 to Jun 13, 2026
- Latest sync
- Jun 7, 2026 1:47 AM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Harrison
Wednesday looks like the warmest upcoming period in Harrison at 92 degrees F.
Monday Night is the coolest period ahead with temperatures near 71 degrees F.
The strongest winds are forecast for Wednesday at about 6 to 12 mph SSW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 7, 2026 1:47 AM 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
Showers and thunderstorms. Mostly cloudy, with a low around 71. South wind 5 to 9 mph. Chance of precipitation is 90%.
Showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. South southwest wind around 8 mph. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 1am. Mostly clear, with a low around 73. South southwest wind around 8 mph.
Sunny, with a high near 92. South southwest wind 6 to 12 mph, with gusts as high as 18 mph.
Mostly clear, with a low around 74. South wind 7 to 12 mph, with gusts as high as 18 mph.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Sunny, with a high near 92. South southwest wind 7 to 12 mph, with gusts as high as 20 mph.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 72. South southwest wind 5 to 10 mph.
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. South southwest wind around 6 mph.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 71. South southwest wind 2 to 6 mph.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. West northwest wind 2 to 6 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Jun 8
|
Showers And Thunderstorms
|
85°F |
6 to 9 mph
S
|
|
Monday Night
Jun 8
|
Showers And Thunderstorms
|
71°F |
5 to 9 mph
S
|
|
Tuesday
Jun 9
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
90°F |
8 mph
SSW
|
|
Tuesday Night
Jun 9
|
Chance Showers And Thunderstorms
|
73°F |
8 mph
SSW
|
|
Wednesday
Jun 10
|
Sunny
|
92°F |
6 to 12 mph
SSW
|
|
Wednesday Night
Jun 10
|
Mostly Clear
|
74°F |
7 to 12 mph
S
|
|
Thursday
Jun 11
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
92°F |
7 to 12 mph
SSW
|
|
Thursday Night
Jun 11
|
Chance Showers And Thunderstorms
|
72°F |
5 to 10 mph
SSW
|
|
Friday
Jun 12
|
Chance Showers And Thunderstorms
|
92°F |
6 mph
SSW
|
|
Friday Night
Jun 12
|
Chance Showers And Thunderstorms
|
71°F |
2 to 6 mph
SSW
|
|
Saturday
Jun 13
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
89°F |
2 to 6 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harrison.