Costa Mesa weather in September (California, United States of America)
What is the weather forecast for Costa Mesa in September? Find out what kind of weather to expect during this month.
Temperatures
The weather in Costa Mesa during September is usually perfect, offering high temperatures and almost no rainfall. Expect the temperatures during the day to hover around 27°C. At night, they will likely drop to about 18°C. With its warm temperatures, this month stands out as the hottest. Be sure to pack appropriately and embrace the summer vibes.
Precipitation
Costa Mesa in September usually receives almost no rainfall, averaging around 4.4 mm for the month. Climate statistics over the past 30 years suggest around a single day of rain.Average sunshine
Expect a lot of sunshine this month, with about 290 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. January, February, March, April, May, June, July, August, September, October and November typically offer the most optimal weather. In contrast, December tends to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Costa Mesa climate page with graphs.
Costa Mesa, monthly averages in September
Min Temperature
18°C
Max Temperature
27°C
Chance of Rain
3%
Precipitation
4.4 mm
Rainy days
a single day
Sunshine
290 hours *
Percentage Sunshine
*
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 Costa Mesa.
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.
