Sunnyvale, TX Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sunnyvale, TX in one place.
Sunny, with a high near 101. Heat index values as high as 110. South southwest wind 5 to 10 mph.
Local Weather Overview
This forecast page for Sunnyvale, TX 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 26, 2026 5:28 PM CDT.
The active forecast window currently covers Jul 27 to Aug 1, 2026 for Sunnyvale, TX.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 27 to Aug 1, 2026
- Latest sync
- Jul 26, 2026 5:28 PM CDT
- Forecast office
- FWD
- Source
- NOAA / NWS
Daily Outlook
This Week in Sunnyvale
Friday looks like the warmest upcoming period in Sunnyvale at 103 degrees F.
Saturday Night is the coolest period ahead with temperatures near 77 degrees F.
The strongest winds are forecast for Monday at about 5 to 10 mph SSW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Jul 26, 2026 5:28 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- FWD
- Radar station
- KFWS
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear. Low around 79, with temperatures rising to around 81 overnight. Heat index values as high as 108. South wind 5 to 10 mph.
Sunny, with a high near 101. South southwest wind 5 to 10 mph.
Mostly clear, with a low around 80. South wind 5 to 10 mph.
Sunny, with a high near 102. South southwest wind 5 to 10 mph.
Mostly clear, with a low around 81. South wind 5 to 10 mph.
Mostly sunny, with a high near 102. South southwest wind 5 to 10 mph.
Mostly clear, with a low around 81.
Mostly sunny, with a high near 103.
Mostly clear, with a low around 81.
A slight chance of rain showers between 7am and 1pm. Sunny, with a high near 101. Chance of precipitation is 20%.
Mostly clear, with a low around 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Jul 27
|
Sunny
|
101°F |
5 to 10 mph
SSW
|
|
Monday Night
Jul 27
|
Mostly Clear
|
79°F |
5 to 10 mph
S
|
|
Tuesday
Jul 28
|
Sunny
|
101°F |
5 to 10 mph
SSW
|
|
Tuesday Night
Jul 28
|
Mostly Clear
|
80°F |
5 to 10 mph
S
|
|
Wednesday
Jul 29
|
Sunny
|
102°F |
5 to 10 mph
SSW
|
|
Wednesday Night
Jul 29
|
Mostly Clear
|
81°F |
5 to 10 mph
S
|
|
Thursday
Jul 30
|
Mostly Sunny
|
102°F |
5 to 10 mph
SSW
|
|
Thursday Night
Jul 30
|
Mostly Clear
|
81°F |
5 to 10 mph
SSE
|
|
Friday
Jul 31
|
Mostly Sunny
|
103°F |
5 to 10 mph
SSW
|
|
Friday Night
Jul 31
|
Mostly Clear
|
81°F |
5 to 10 mph
SSW
|
|
Saturday
Aug 1
|
Slight Chance Rain Showers
|
101°F |
5 to 10 mph
NW
|
|
Saturday Night
Aug 1
|
Mostly Clear
|
77°F |
5 to 10 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sunnyvale.