Simpson, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Simpson, IL in one place.
Sunny, with a high near 78. Southwest wind 2 to 9 mph, with gusts as high as 18 mph.
Local Weather Overview
This forecast page for Simpson, 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 19, 2026 6:50 PM CDT.
The active forecast window currently covers Apr 22 to Apr 25, 2026 for Simpson, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 25, 2026
- Latest sync
- Apr 19, 2026 6:50 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Simpson
Thursday looks like the warmest upcoming period in Simpson at 81 degrees F.
Saturday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Thursday at about 3 to 15 mph S.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 19, 2026 6:50 PM CDT
- Coverage
- 4 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
Mostly clear, with a low around 56. South southwest wind around 6 mph.
Sunny, with a high near 81. South wind 3 to 15 mph, with gusts as high as 26 mph.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. South wind around 12 mph, with gusts as high as 22 mph.
Showers and thunderstorms. Mostly cloudy, with a high near 78. South southwest wind 9 to 13 mph, with gusts as high as 23 mph.
Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 56. West wind around 7 mph.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 74. Northwest wind 5 to 8 mph.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 54. North northeast wind around 6 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Sunny
|
78°F |
2 to 9 mph
SW
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
56°F |
6 mph
SSW
|
|
Thursday
Apr 23
|
Sunny
|
81°F |
3 to 15 mph
S
|
|
Thursday Night
Apr 23
|
Partly Cloudy then Chance Showers And Thunderstorms
|
63°F |
12 mph
S
|
|
Friday
Apr 24
|
Showers And Thunderstorms
|
78°F |
9 to 13 mph
SSW
|
|
Friday Night
Apr 24
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
56°F |
7 mph
W
|
|
Saturday
Apr 25
|
Chance Showers And Thunderstorms
|
74°F |
5 to 8 mph
NW
|
|
Saturday Night
Apr 25
|
Chance Showers And Thunderstorms
|
54°F |
6 mph
NNE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Simpson.