Granite City, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Granite City, IL in one place.
A chance of rain showers before 1pm, then showers and thunderstorms likely. Mostly cloudy. High near 73, with temperatures falling to around 67 in the afternoon. West wind around 9 mph. Chance of precipitation is 60%.
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: Apr 9, 2026 4:33 AM CDT.
The active forecast window currently covers Apr 10 to Apr 15, 2026 for Granite City, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 10 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 4:33 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Granite City
Monday looks like the warmest upcoming period in Granite City at 85 degrees F.
Friday Night is the coolest period ahead with temperatures near 53 degrees F.
The strongest winds are forecast for Sunday at about 7 to 16 mph S.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 4:33 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
Showers and thunderstorms likely. Mostly cloudy, with a low around 53. Northeast wind 3 to 7 mph. Chance of precipitation is 60%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
A chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Chance of precipitation is 50%.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Showers And Thunderstorms Likely
|
73°F |
9 mph
W
|
|
Friday Night
Apr 10
|
Showers And Thunderstorms Likely
|
53°F |
3 to 7 mph
NE
|
|
Saturday
Apr 11
|
Chance Rain Showers
|
77°F |
8 mph
E
|
|
Saturday Night
Apr 11
|
Chance Showers And Thunderstorms then Partly Cloudy
|
62°F |
7 mph
SE
|
|
Sunday
Apr 12
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
81°F |
7 to 16 mph
S
|
|
Sunday Night
Apr 12
|
Chance Showers And Thunderstorms
|
66°F |
12 to 15 mph
S
|
|
Monday
Apr 13
|
Chance Showers And Thunderstorms
|
85°F |
12 to 15 mph
S
|
|
Monday Night
Apr 13
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
69°F |
14 mph
S
|
|
Tuesday
Apr 14
|
Chance Showers And Thunderstorms
|
84°F |
10 to 14 mph
S
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
63°F |
13 mph
S
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
77°F |
13 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Granite City.