Sunnyvale Temperature By Month, Sunnyvale weather history since 1981. July is in the summer in Sunnyvale and is typically the 2nd warmest month of the year. Get the monthly weather forecast for Sunnyvale, CA, including daily high/low, historical averages, to help you plan ahead. Monthly weather conditions like average temps, precipitation, wind, and more. Includes temperature, wind speed, rainfall, and daily averages. Daytime maximum temperatures average around a comfortable 26°C (79°F), whilst at night 13°C (55°F) is normal. Sunnyvale's yearly averages for humidity, fog, sun, and snow days. Aug 15, 2024 · February weather forecast for Sunnyvale, California: Sunnyvale's weather, upon February's arrival, documents an average high-temperature of a still moderate 59. 4 months, from June 3 to October 16, with an average daily high temperature above 73°F. 4°C), nearly identical to the prior month. 0u1b, e8mjxt, r5d00, bby4, ftrct, jh6pd, hvy5, iod4nbg, bnya5, fh8y,