Sunnyvale, CA Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sunnyvale, CA in one place.
Mostly sunny, with a high near 78. Southwest wind around 9 mph.
Local Weather Overview
This forecast page for Sunnyvale, 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: Jul 19, 2026 6:43 AM PDT.
The active forecast window currently covers Jul 20 to Jul 25, 2026 for Sunnyvale, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 20 to Jul 25, 2026
- Latest sync
- Jul 19, 2026 6:43 AM PDT
- Forecast office
- MTR
- Source
- NOAA / NWS
Daily Outlook
This Week in Sunnyvale
Tuesday looks like the warmest upcoming period in Sunnyvale at 86 degrees F.
Friday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Tuesday Night at about 10 mph WSW.
The forecast from Jul 20 through Jul 25 stays mostly dry.
Forecast Details
- Last updated
- Jul 19, 2026 6:43 AM 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
Partly cloudy, with a low around 60. West southwest wind around 9 mph.
Mostly sunny, with a high near 86.
Mostly clear, with a low around 63.
Sunny, with a high near 81.
Partly cloudy, with a low around 59.
Sunny, with a high near 77.
Mostly clear, with a low around 57.
Sunny, with a high near 77.
Mostly clear, with a low around 56.
Sunny, with a high near 80.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Jul 20
|
Mostly Sunny
|
78°F |
9 mph
SW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
60°F |
9 mph
WSW
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
86°F |
9 mph
WSW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
63°F |
10 mph
WSW
|
|
Wednesday
Jul 22
|
Sunny
|
81°F |
10 mph
WSW
|
|
Wednesday Night
Jul 22
|
Partly Cloudy
|
59°F |
10 mph
WSW
|
|
Thursday
Jul 23
|
Sunny
|
77°F |
10 mph
WSW
|
|
Thursday Night
Jul 23
|
Mostly Clear
|
57°F |
10 mph
SW
|
|
Friday
Jul 24
|
Sunny
|
77°F |
9 mph
SW
|
|
Friday Night
Jul 24
|
Mostly Clear
|
56°F |
9 mph
SW
|
|
Saturday
Jul 25
|
Sunny
|
80°F |
9 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sunnyvale.
