Cupertino, CA Weather Forecast
Local 7-day forecast
Patchy Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Cupertino, CA in one place.
Patchy fog before 8am. Mostly sunny, with a high near 88. West southwest wind 0 to 6 mph.
Local Weather Overview
This forecast page for Cupertino, 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 21, 2026 10:51 PM PDT.
The active forecast window currently covers Sep 23 to Sep 28, 2026 for Cupertino, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 23 to Sep 28, 2026
- Latest sync
- Sep 21, 2026 10:51 PM PDT
- Forecast office
- MTR
- Source
- NOAA / NWS
Daily Outlook
This Week in Cupertino
Wednesday looks like the warmest upcoming period in Cupertino at 88 degrees F.
Saturday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Thursday at about 1 to 8 mph SW.
The forecast from Sep 23 through Sep 28 stays mostly dry.
Forecast Details
- Last updated
- Sep 21, 2026 10:51 PM PDT
- Coverage
- 6 days
- Time zone
- America/Los_Angeles
- Forecast office
- MTR
- Radar station
- KMUX
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 57. South southwest wind 0 to 6 mph.
Sunny, with a high near 84.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 76.
Mostly clear, with a low around 52.
Sunny, with a high near 76.
Partly cloudy, with a low around 51.
Sunny, with a high near 73.
Mostly clear, with a low around 52.
Sunny, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 23
|
Patchy Fog then Mostly Sunny
|
88°F |
0 to 6 mph
WSW
|
|
Wednesday Night
Sep 23
|
Mostly Clear
|
57°F |
0 to 6 mph
SSW
|
|
Thursday
Sep 24
|
Sunny
|
84°F |
1 to 8 mph
SW
|
|
Thursday Night
Sep 24
|
Partly Cloudy
|
55°F |
8 mph
SW
|
|
Friday
Sep 25
|
Mostly Sunny
|
76°F |
8 mph
SW
|
|
Friday Night
Sep 25
|
Mostly Clear
|
52°F |
5 to 8 mph
SW
|
|
Saturday
Sep 26
|
Sunny
|
76°F |
5 to 8 mph
SW
|
|
Saturday Night
Sep 26
|
Partly Cloudy
|
51°F |
8 mph
WSW
|
|
Sunday
Sep 27
|
Sunny
|
73°F |
8 mph
SW
|
|
Sunday Night
Sep 27
|
Mostly Clear
|
52°F |
3 to 8 mph
SW
|
|
Monday
Sep 28
|
Sunny
|
81°F |
2 to 7 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cupertino.
