Grand Tower, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grand Tower, IL in one place.
Sunny. High near 97, with temperatures falling to around 95 in the afternoon. Heat index values as high as 109. South southwest wind 5 to 8 mph.
Local Weather Overview
This forecast page for Grand Tower, 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: Sep 15, 2026 2:52 PM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Grand Tower, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 2:52 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Grand Tower
Thursday looks like the warmest upcoming period in Grand Tower at 98 degrees F.
Monday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for This Afternoon at about 5 to 8 mph SSW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 2:52 PM CDT
- Coverage
- 7 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. Low around 73, with temperatures rising to around 75 overnight. South wind around 5 mph.
Mostly sunny. High near 97, with temperatures falling to around 95 in the afternoon. Heat index values as high as 106. South southwest wind 2 to 6 mph.
Mostly clear, with a low around 73. South wind around 3 mph.
Sunny, with a high near 98. Southwest wind around 3 mph.
Mostly clear, with a low around 72. South southeast wind around 1 mph.
Sunny, with a high near 96. Southwest wind around 2 mph.
Mostly clear, with a low around 72. South southeast wind around 2 mph.
Sunny, with a high near 96. South southwest wind 2 to 7 mph.
Mostly clear, with a low around 72. South southwest wind around 5 mph.
Sunny, with a high near 94. West southwest wind 2 to 7 mph.
Partly cloudy, with a low around 68. Southwest wind around 6 mph.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. West northwest wind 3 to 7 mph.
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 64. North wind around 6 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Sep 15
|
Sunny
|
97°F |
5 to 8 mph
SSW
|
|
Tonight
Sep 15
|
Mostly Clear
|
73°F |
5 mph
S
|
|
Wednesday
Sep 16
|
Mostly Sunny
|
97°F |
2 to 6 mph
SSW
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
73°F |
3 mph
S
|
|
Thursday
Sep 17
|
Sunny
|
98°F |
3 mph
SW
|
|
Thursday Night
Sep 17
|
Mostly Clear
|
72°F |
1 mph
SSE
|
|
Friday
Sep 18
|
Sunny
|
96°F |
2 mph
SW
|
|
Friday Night
Sep 18
|
Mostly Clear
|
72°F |
2 mph
SSE
|
|
Saturday
Sep 19
|
Sunny
|
96°F |
2 to 7 mph
SSW
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
72°F |
5 mph
SSW
|
|
Sunday
Sep 20
|
Sunny
|
94°F |
2 to 7 mph
WSW
|
|
Sunday Night
Sep 20
|
Partly Cloudy
|
68°F |
6 mph
SW
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
85°F |
3 to 7 mph
WNW
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
64°F |
6 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grand Tower.
