El Rodeo Weather in September
What's the weather like in El Rodeo (San Marcos) in September 2025?
The climate in El Rodeo during September can be summarized as warm, humid and very wet.
September is in the fall / autumn in El Rodeo and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 16°C (61°F) is normal.
| Daytime temperature | 27.3°C 81.1°F |
|---|---|
| Nightly temperature | 16°C 60.7°F |
| Average temperature | 21.6°C 70.9°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 708 mm 27.9 ins |
| Rainy days | 23 days |
| Sea temperature | 29.5°C 85.1°F |
| Humidity | 90% |
| Windspeed | 7.9kph 5 mph |
On average September is the wettest month of the year in El Rodeo with around 708mm 27.9 inches of rain making it a very wet time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
September temperatures in El Rodeo
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 El Rodeo in September 2025.
Other monthly averages
Best places to visit in September
El Rodeo weather stats
| Hottest month: | May | 28.2°C 82.8°F |
|---|---|---|
| Driest month: | January | 42mm 1.7ins |
| Sunniest month: | February | 8.2hrs |
| Coldest month: | January | 27.4°C 81.3°F |
| Wettest month: | September | 708mm 27.9ins |
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