The climate in Saint-Cast-le-Guildo during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Saint-Cast-le-Guildo and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 20°C (67°F), whilst at night 12°C (54°F) is normal.
|Daytime temperature||19.6°C 67.3°F|
|Nightly temperature||12.2°C 54°F|
|Average temperature||15.9°C 60.6°F|
|Daily sunshine||6.4 hrs|
|Avg rainfall||62 mm 2.4 ins|
|Rainy days||13 days|
|Sea temperature||17°C 62.6°F|
|Windspeed||15.8kph 10 mph|
On average September is the 6th driest month of the year in Saint-Cast-le-Guildo with around 62mm 2.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.4 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 Saint-Cast-le-Guildo in September 2022.
|Hottest month:||July||21.5°C 70.7°F|
|Driest month:||July||40mm 1.6ins|
|Coldest month:||January||8.2°C 46.8°F|
|Wettest month:||November||96mm 3.8ins|