Napa weather in September (California, United States of America)
Thinking of visiting Napa in September? Check the weather first! See what weather conditions to anticipate this month with our guide.
Temperatures
The weather in Napa is usually perfect in September, featuring high temperatures and almost no rainfall. Summer occurs in September. As the day progresses, temperatures can peak at 30°C. Luckily at nightfall, they typically drop to 12°C. This month is typically the hottest of the year, so prepare with cool and comfortable cloths. Embrace the sunshine while keeping sun protection handy.
Precipitation
Napa in September usually receives almost no rainfall, averaging around 3.8 mm for the month. According to historical climate patterns, there are usually around 1 day days of rain.Average sunshine
Expect a lot of sunshine this month, with about 275 hours of sunny weather. The abundant sunlight creates a lively and bright atmosphere.So this is a great month to visit if you prefer dry days with pleasant temperatures. April, May, June, July, August, September and October typically offer the most optimal weather. In contrast, February and December tend to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Napa climate page with graphs.
Napa, monthly averages in September
Min Temperature
12°C
Max Temperature
30°C
Chance of Rain
3%
Precipitation
3.8 mm
Rainy days
1 day
Sunshine
275 hours *
Percentage Sunshine
77% *
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 Napa.
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.
