Sunnyvale weather in September (California, United States of America)
Thinking of visiting Sunnyvale in September? Check the weather first! Get all the weather information you need to plan your visit.
Temperatures
The weather in Sunnyvale is usually perfect in September, featuring high temperatures and almost no rainfall. Experience the summer season in September. Expect daytime highs to reach approximately 27°C, with nighttime lows dipping to around 14°C. Experience the hottest month of the year with ease by packing light and breathable clothing. Staying cool and hydrated will ensure a pleasant experience.
Precipitation
Sunnyvale in September usually receives almost no rainfall, averaging around 2.8 mm for the month. Based on our climate data of the past 30 years, about a single day of rain are anticipated.Average sunshine
With around 270 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Sunnyvale. April, May, June, July, August, September and October typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.
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Sunnyvale, monthly averages in September
Min Temperature
14°C
Max Temperature
27°C
Chance of Rain
3%
Precipitation
2.8 mm
Rainy days
a single day
Humidity
73% *
Sunshine
270 hours *
Percentage Sunshine
73% *
Where to go in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in this month?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Interested in more climate information?
This site provides you with all the information you need about the climate in Sunnyvale.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.
