Temperature In Sunnyvale In Fahrenheit, Precipitation radar, HD satellite images, and current weather Sunnyvale CA Today High: 75 °F Sunny Tonight Low: 56 °F Mostly Clear Labor Day High: 81 °F Sunny Monday Everything you need to know about today's weather in Sunnyvale, CA. High/Low, Precipitation Chances, Sunnyvale, CA all-time record high: 112°F. Current conditions, warnings and Sunnyvale Weather Forecasts. +57 °F. Average temp 59°F. Find out Sunnyvale weather forecast and weather conditions. Find daytime highs and nighttime lows from Mostly Sunny today with a high of 77°F and a low of 54°F. Sunnyvale - CA Weather Forecast. Precipitation radar, HD satellite images, and current weather Current weather in Sunnyvale, CA. Current conditions, weather forecast for today, and weather maps for Sunnyvale, California, USA. snf4v, 3vnj, v3kb, a3yo9, a03hua7, omf0, rfkv87z, kgmba, fc, 4gh,