Potam Weather in September

What's the weather like in Potam (Sonora) in September 2025?

The climate in Potam during September can be summarized as very hot and reasonably dry.

September is in the fall / autumn in Potam and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a hot 36°C (96°F), whilst at night 25°C (77°F) is normal.

Potam weather averages (imperial / metric)
Daytime temperature	35.5°C 95.9°F
Nightly temperature	24.9°C 76.8°F
Average temperature	30.2°C 86.4°F
Daily sunshine	8.3 hrs
Avg rainfall	47 mm 1.8 ins
Rainy days	3 days
Sea temperature	30.2°C 86.4°F
Humidity	63%
Windspeed	8.3kph 5 mph

On average September is the 3rd wettest month of the year in Potam with around 47mm 1.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

September temperatures in Potam

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 Potam in September 2025.