The climate in San Narciso during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in San Narciso and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 23°C (73°F) is normal.
Daytime temperature | 30.1°C 86.1°F |
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Nightly temperature | 22.6°C 72.6°F |
Average temperature | 26.3°C 79.3°F |
Daily sunshine | 6 hrs |
Avg rainfall | 557 mm 21.9 ins |
Rainy days | 21 days |
Sea temperature | 29.3°C 84.8°F |
Humidity | 85% |
Windspeed | 6.8kph 4 mph |
On average September is the 4th wettest month of the year in San Narciso with around 557mm 21.9 inches of rain making it a very wet time to visit. This rainfall is typically spread over 21 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
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 Narciso in September 2025.
Best places to visit in September
Hottest month: | May | 32.4°C 90.3°F |
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Driest month: | January | 2mm 0.1ins |
Sunniest month: | April | 9.6hrs |
Coldest month: | January | 30.1°C 86.2°F |
Wettest month: | August | 990mm 39ins |