San Juan Bautista Weather in September
What's the weather like in San Juan Bautista (Suchitepéquez) in September 2025?
The climate in San Juan Bautista during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in San Juan Bautista and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a steamy 30°C (87°F), whilst at night 21°C (69°F) is normal.
| Daytime temperature | 30.4°C 86.7°F |
|---|---|
| Nightly temperature | 20.6°C 69.1°F |
| Average temperature | 25.5°C 77.9°F |
| Daily sunshine | 6.7 hrs |
| Avg rainfall | 564 mm 22.2 ins |
| Rainy days | 22 days |
| Sea temperature | 29.5°C 85.1°F |
| Humidity | 82% |
| Windspeed | 7.9kph 5 mph |
On average September is the 2nd wettest month of the year in San Juan Bautista with around 564mm 22.2 inches of rain making it a very wet time to visit. This rainfall is typically spread over 22 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.7 hours of sunshine per day.
September temperatures in San Juan Bautista
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 Juan Bautista in September 2025.
Other monthly averages
Best places to visit in September
San Juan Bautista weather stats
| Hottest month: | May | 32.1°C 89.8°F |
|---|---|---|
| Driest month: | January | 9mm 0.4ins |
| Sunniest month: | February | 9.2hrs |
| Coldest month: | January | 31.5°C 88.7°F |
| Wettest month: | October | 586mm 23.1ins |
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