Granite City, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Granite City, IL in one place.
Sunny, with a high near 86. Northwest wind around 5 mph.
Local Weather Overview
This forecast page for Granite City, 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: Oct 10, 2026 2:59 AM CDT.
The active forecast window currently covers Oct 11 to Oct 16, 2026 for Granite City, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 11 to Oct 16, 2026
- Latest sync
- Oct 10, 2026 2:59 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Granite City
Columbus Day looks like the warmest upcoming period in Granite City at 95 degrees F.
Thursday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Friday at about 12 to 15 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 10, 2026 2:59 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
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 65. South wind around 3 mph.
Sunny, with a high near 95.
Mostly clear, with a low around 72.
Sunny, with a high near 91.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 72. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Oct 11
|
Sunny
|
86°F |
5 mph
NW
|
|
Sunday Night
Oct 11
|
Mostly Clear
|
65°F |
3 mph
S
|
|
Columbus Day
Oct 12
|
Sunny
|
95°F |
3 to 10 mph
SW
|
|
Monday Night
Oct 12
|
Mostly Clear
|
72°F |
10 mph
SW
|
|
Tuesday
Oct 13
|
Sunny
|
91°F |
10 mph
W
|
|
Tuesday Night
Oct 13
|
Partly Cloudy then Chance Showers And Thunderstorms
|
65°F |
7 mph
NE
|
|
Wednesday
Oct 14
|
Chance Showers And Thunderstorms
|
82°F |
8 mph
E
|
|
Wednesday Night
Oct 14
|
Chance Showers And Thunderstorms
|
63°F |
9 mph
SE
|
|
Thursday
Oct 15
|
Chance Showers And Thunderstorms
|
81°F |
10 mph
S
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms
|
58°F |
7 to 10 mph
W
|
|
Friday
Oct 16
|
Chance Showers And Thunderstorms
|
72°F |
12 to 15 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Granite City.