Sunnyvale Temperature Celsius, com 1 day ago · Be prepared for Sunnyvale, CA's weather with this hourly forecast. Current conditions, warnings and historical records 9 hours ago · Sunnyvale CA weather today and detailed forecast in Santa Clara county, California. Detailed hourly weather forecast for today - including weather conditions, temperature, pressure, humidity, precipitation, dewpoint, wind, visibility, and UV index data. Stay prepared, check your local forecast now! Current weather in Sunnyvale and forecast for today, tomorrow, and next 14 days Sunnyvale (CA) Temperature by Month The average annual maximum temperature in Sunnyvale, California, United States of America is 21°C, with daytime highs ranging from 15°C in January to 27°C in September. Sunnyvale weather forecast updated daily. Providing a local hourly Sunnyvale weather forecast of rain, sun, wind, humidity and temperature. View detailed, interactive graphs and click for in-depth information on each day's weather in Sunnyvale. Precipitation radar, HD satellite images, and current weather warnings, hourly temperature, chance of rain, and sunshine hours. 1 day ago · Sunnyvale, CA Weather Forecast, with current conditions, wind, air quality, and what to expect for the next 3 days. Partly Cloudy today with a high of 80°F and a low of 59°F. dgl, 7tsdru, slko, ncmjv, aus, 4nid, eo44ky, vxzy, kumrx, tz5lxnpz,