Grand Island, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grand Island, CA in one place.
Sunny, with a high near 87. Southeast wind 1 to 7 mph.
Local Weather Overview
This forecast page for Grand Island, CA 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 14, 2026 6:04 PM PDT.
The active forecast window currently covers Sep 15 to Sep 20, 2026 for Grand Island, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 20, 2026
- Latest sync
- Sep 14, 2026 6:04 PM PDT
- Forecast office
- STO
- Source
- NOAA / NWS
Daily Outlook
This Week in Grand Island
Saturday looks like the warmest upcoming period in Grand Island at 89 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Tuesday at about 1 to 7 mph SE.
The forecast from Sep 15 through Sep 20 stays mostly dry.
Forecast Details
- Last updated
- Sep 14, 2026 6:04 PM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- STO
- Radar station
- KBBX
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 southeast wind 2 to 7 mph.
Mostly sunny, with a high near 82. South southeast wind 2 to 7 mph.
Mostly clear, with a low around 54.
Sunny, with a high near 80.
Clear, with a low around 55.
Sunny, with a high near 87.
Clear, with a low around 57.
Sunny, with a high near 89.
Mostly clear, with a low around 57.
Sunny, with a high near 88.
Mostly clear, with a low around 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Sunny
|
87°F |
1 to 7 mph
SE
|
|
Tuesday Night
Sep 15
|
Mostly Clear
|
56°F |
2 to 7 mph
SSE
|
|
Wednesday
Sep 16
|
Mostly Sunny
|
82°F |
2 to 7 mph
SSE
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
54°F |
2 to 7 mph
SSE
|
|
Thursday
Sep 17
|
Sunny
|
80°F |
2 mph
SSE
|
|
Thursday Night
Sep 17
|
Clear
|
55°F |
2 mph
N
|
|
Friday
Sep 18
|
Sunny
|
87°F |
3 mph
NNW
|
|
Friday Night
Sep 18
|
Clear
|
57°F |
2 mph
SE
|
|
Saturday
Sep 19
|
Sunny
|
89°F |
3 mph
NNE
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
57°F |
3 mph
SE
|
|
Sunday
Sep 20
|
Sunny
|
88°F |
3 mph
ESE
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
57°F |
3 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grand Island.