San José del Golfo Weather in September
What's the weather like in San José del Golfo (Guatemala) in September 2025?
The climate in San José del Golfo during September can be summarized as warm, humid and very wet.
September is in the fall / autumn in San José del Golfo and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 17°C (63°F) is normal.
| Daytime temperature | 26.6°C 79.9°F |
|---|---|
| Nightly temperature | 17.2°C 63°F |
| Average temperature | 21.9°C 71.4°F |
| Daily sunshine | 6.5 hrs |
| Avg rainfall | 228 mm 9 ins |
| Rainy days | 25 days |
| Sea temperature | 29.5°C 85.1°F |
| Humidity | 83% |
| Windspeed | 8.6kph 5 mph |
On average September is the wettest month of the year in San José del Golfo with around 228mm 9 inches of rain making it a very wet time to visit. This rainfall is typically spread over 25 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
September temperatures in San José del Golfo
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 José del Golfo in September 2025.
Other monthly averages
Best places to visit in September
San José del Golfo weather stats
| Hottest month: | May | 28.3°C 82.9°F |
|---|---|---|
| Driest month: | February | 12mm 0.5ins |
| Sunniest month: | April | 9.7hrs |
| Coldest month: | January | 24.7°C 76.5°F |
| Wettest month: | September | 228mm 9ins |
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