Sunnyvale Temperature Celsius, Best time to visit. 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 Sunnyvale CA weather forecast for tomorrow and the next 5 days with detailed summaries of day to night conditions including local barometric pressure, humidity, wind, storms and more! Get the Sunnyvale, CA hour-by-hour weather forecast for today. 323 mm (13 in) yearly rain. 1 day ago Mostly Sunny today with a high of 79°F and a low of 55°F. Sunnyvale TX 14 Day Weather Forecast - Long range, extended 75182 Sunnyvale, Texas 14 Day weather forecasts and current conditions for Sunnyvale, TX. Get Sunnyvale, CA current weather report with temperature, feels like, wind, humidity, pressure, UV and more from TheWeatherNetwork. View detailed, interactive graphs and click for in-depth information on each day's weather in Sunnyvale. Detailed local weather in Sunnyvale CA for today with hourly and 5-Day forecast, radar, past weather, and weather alerts for 94086 and surrounding areas of Santa Clara county, California. Stay prepared, check your local forecast now! Make your map your own. Today's high temperature will be nearly the same as yesterday's. wlr, 2shu, hioh, gv, v92xd, dhs, 1bh0z5, gby, ghjb4, i8n,