San Marcos weather in September (California, United States of America)
How does the September weather in San Marcos compare to other months? Explore our page to find a thorough overview of this month's weather conditions.
Temperatures
The weather in San Marcos during September is usually perfect, offering high temperatures and almost no rainfall. Enjoy the summer season during this month. In the daytime, temperatures tend to hover near 30°C, cooling down at night to around 16°C. Often, it stands out as the year's warmest month. With this in mind, cool breathable fabrics will make navigating the heat much more bearable. Always be ready to embrace the warmth while staying cool and protected.
Precipitation
San Marcos in September usually receives almost no rainfall, averaging around 4.6 mm for the month. Climate data suggests that about a single day will experience rainfall.Average sunshine
Expect a lot of sunshine this month, with about 253 hours of sunny weather. The abundant sunlight creates a lively and bright atmosphere.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. January, February, March, April, May, June, July, August, September, October and November generally stand out with the best circumstances. While December tends to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized San Marcos climate page with graphs.
San Marcos, monthly averages in September
Min Temperature
16°C
Max Temperature
30°C
Chance of Rain
3%
Precipitation
4.6 mm
Rainy days
a single day
Humidity
74% *
Sunshine
253 hours *
Percentage Sunshine
68% *
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 San Marcos.
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.
