Sunnyvale weather
At 2:45 PM local time it was cloudy and 18°C (64°F). Light rain for 3 of the next 24 hours (under 1 mm/h, 1.4 mm total) — cloudy, but fine to be out. Best months for weather: May–Oct. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Sunnyvale, California, United States.
Current conditions
- Clouds
- 100%
- Chance of rain
- 1%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 3 of the next 24 hours (under 1 mm/h, 1.4 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season May–OctOff season Dec–Feb
About Sunnyvale weather
Is it raining in Sunnyvale right now?
No. It’s cloudy and 18° right now. Light rain for 3 of the next 24 hours (under 1 mm/h, 1.4 mm total) — cloudy, but fine to be out.
What’s the weather like in Sunnyvale this week?
Over the next 7 days, expect highs of 18–22° and lows of 8–14°. Rain is likely on 1 of 7 days (Sunday). The driest day looks like Monday.
Has it been raining in Sunnyvale lately?
Barely. The past 7 days were mostly dry, with 0.0 mm of rain in total.
What should I pack for Sunnyvale?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Sunnyvale weather by month
When is the best time to visit Sunnyvale?
Based on weather alone, the best time to visit Sunnyvale is May–Oct, according to NASA's 2001–2025 climate averages. Dec–Feb tends to be the least pleasant. Average highs run from 13°C (56°F) in December to 29°C (84°F) in August.
What is the rainiest month in Sunnyvale?
December is the wettest month, with about 114 mm (4.5 in) of rain on average. July is the driest, with about 0 mm (0.0 in).
What is the hottest month in Sunnyvale?
August is the warmest, with average highs of 29°C (84°F) and lows of 11°C (51°F). December is the coolest, with highs of 13°C (56°F) and lows of 4°C (38°F).
Does Sunnyvale have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is December at about 114 mm (4.5 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months