San Marcos Weather in September
What's the weather like in San Marcos (San Marcos) in September 2024?
The climate in San Marcos during September can be summarized as mild and wet.
September is in the fall / autumn in San Marcos and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 11°C (51°F) is normal.
| Daytime temperature | 21.1°C 69.9°F |
|---|---|
| Nightly temperature | 10.6°C 51°F |
| Average temperature | 15.8°C 60.4°F |
| Daily sunshine | 5.9 hrs |
| Avg rainfall | 184 mm 7.2 ins |
| Rainy days | 24 days |
| Sea temperature | 29.5°C 85.1°F |
| Humidity | 84% |
| Windspeed | 8.3kph 5 mph |
On average September is the 2nd wettest month of the year in San Marcos with around 184mm 7.2 inches of rain making it a wet time to visit. This rainfall is typically spread over 24 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.9 hours of sunshine per day.
September temperatures in San Marcos
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Marcos in September 2024.
Other monthly averages
Best places to visit in September
San Marcos weather stats
| Hottest month: | May | 23.3°C 73.9°F |
|---|---|---|
| Driest month: | January | 0mm 0ins |
| Sunniest month: | January | 8.9hrs |
| Coldest month: | January | 18.2°C 64.8°F |
| Wettest month: | June | 193mm 7.6ins |
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