Sunnyvale, CA Weather Forecast
Right now it is 50°F and clear in Sunnyvale (as of Sat, 3:35 AM PST). Saturday: high near 75°F. Tomorrow: patchy fog then partly sunny, high near 72°F. Official NWS forecast and alerts, refreshed every 30 minutes.
Current conditions
Measured at Mountain View, Moffett Field (4 mi from the city center).
Weather tomorrow in Sunnyvale
Patchy Fog then Partly Sunny72°FPatchy fog before 9am. Partly sunny, with a high near 72. North northwest wind 2 to 6 mph.
Partly Cloudy51°FPartly cloudy, with a low around 51. Northwest wind 1 to 6 mph.
Weather alerts
No active National Weather Service watches, warnings or advisories for Sunnyvale right now.
7-day forecast
Mostly Clear51°FOvernight: Mostly clear, with a low around 51. Southwest wind around 2 mph.
Mostly Sunny75°F / 51°FMostly sunny. High near 75, with temperatures falling to around 69 in the afternoon. Northeast wind 1 to 7 mph. Saturday Night: Patchy fog after 1am. Mostly cloudy, with a low around 51. West wind around 5 mph.
Patchy Fog then Partly Sunny72°F / 51°FPatchy fog before 9am. Partly sunny, with a high near 72. North northwest wind 2 to 6 mph. Sunday Night: Partly cloudy, with a low around 51. Northwest wind 1 to 6 mph.
Mostly Sunny72°F / 51°FMostly sunny, with a high near 72. Monday Night: Patchy fog after 2am. Mostly clear, with a low around 51.
Patchy Fog then Sunny74°F / 52°FPatchy fog before 7am. Sunny, with a high near 74. Tuesday Night: Mostly clear, with a low around 52.
Sunny
15% chance of rain/snow77°F / 53°FSunny, with a high near 77. Wednesday Night: A slight chance of rain after 4am. Partly cloudy, with a low around 53.
Slight Chance Light Rain 19% chance of rain/snow72°F / 52°FA slight chance of rain. Mostly sunny, with a high near 72. Thursday Night: A slight chance of rain. Partly cloudy, with a low around 52.
Chance Light Rain 40% chance of rain/snow69°FA chance of rain. Partly sunny, with a high near 69.
Forecast issued by NWS forecast office MTR · updated Nov 7, 3:01 AM PST. Daytime highs and overnight lows are on the right.
Hourly forecast, radar & more on weather.gov
Nearby cities
Sunnyvale population: 156,577 (U.S. Census Bureau, July 1, 2025 estimate). More California cities · All US cities
Source: National Weather Service / NOAA (public domain), fetched live. Tachlis is not affiliated with the NWS.
Questions & answers
What is the weather tomorrow in Sunnyvale?
Sunday, November 8: Patchy Fog then Partly Sunny, high near 72°F; night: partly cloudy, low around 51°F.
Where does the Sunnyvale forecast come from?
From the National Weather Service forecast office MTR, which writes the official forecast for Sunnyvale's 2.5 km grid square. Current conditions come from the nearest NWS/FAA weather station.
How often is the Sunnyvale weather updated?
This page fetches fresh data from the National Weather Service at most every 30 minutes, and checks for new watches and warnings every 5 minutes.
What time zone are the times shown in?
Local time for Sunnyvale (America/Los Angeles).
Why can the current temperature differ from the forecast?
The current reading is a real measurement at a weather station, often at an airport, while the forecast describes the whole grid square around the city. Temperatures can differ by a few degrees across a city.