Harrisburg, IL Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Harrisburg, IL in one place.
A chance of rain showers. Mostly cloudy, with a high near 80. East northeast wind 2 to 7 mph. Chance of precipitation is 50%.
Local Weather Overview
This forecast page for Harrisburg, 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: May 28, 2026 11:17 PM CDT.
The active forecast window currently covers May 30 to Jun 4, 2026 for Harrisburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 30 to Jun 4, 2026
- Latest sync
- May 28, 2026 11:17 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Harrisburg
Monday looks like the warmest upcoming period in Harrisburg at 83 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Saturday at about 2 to 7 mph ENE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- May 28, 2026 11:17 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 slight chance of rain showers before 7pm. Mostly cloudy, with a low around 61. East northeast wind around 6 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 80. East northeast wind around 3 mph.
Partly cloudy, with a low around 62. Northeast wind around 2 mph.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Sunny, with a high near 83. North northeast wind 0 to 5 mph.
A chance of showers and thunderstorms. Mostly clear, with a low around 61. Northeast wind 0 to 3 mph.
A chance of rain showers before 7am. Sunny, with a high near 82. Northeast wind 2 to 7 mph.
Mostly clear, with a low around 59. East northeast wind 2 to 6 mph.
Sunny, with a high near 80. East wind 3 to 7 mph.
Mostly clear, with a low around 59. East southeast wind 1 to 6 mph.
Sunny, with a high near 83. Southeast wind 2 to 6 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Chance Rain Showers
|
80°F |
2 to 7 mph
ENE
|
|
Saturday Night
May 30
|
Slight Chance Rain Showers then Mostly Cloudy
|
61°F |
6 mph
ENE
|
|
Sunday
May 31
|
Mostly Sunny
|
80°F |
3 mph
ENE
|
|
Sunday Night
May 31
|
Partly Cloudy
|
62°F |
2 mph
NE
|
|
Monday
Jun 1
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
83°F |
0 to 5 mph
NNE
|
|
Monday Night
Jun 1
|
Chance Showers And Thunderstorms
|
61°F |
0 to 3 mph
NE
|
|
Tuesday
Jun 2
|
Chance Rain Showers then Sunny
|
82°F |
2 to 7 mph
NE
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
59°F |
2 to 6 mph
ENE
|
|
Wednesday
Jun 3
|
Sunny
|
80°F |
3 to 7 mph
E
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
59°F |
1 to 6 mph
ESE
|
|
Thursday
Jun 4
|
Sunny
|
83°F |
2 to 6 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harrisburg.
