Cast weather in September (Brittany, France)

What should you pack for a trip to Cast in September? Check out this detailed guide to the month’s weather conditions.

Temperatures

During September, Cast is known for its perfect weather, characterized by pleasant temperatures and moderate rainfall. September is part of summer. Throughout the daytime, temperatures often hover around 20°C. However, as the sun sets and evening approaches, there's a noticeable cool-down. Temperatures gently drop to a more temperate 13°C.

Precipitation

Cast in September usually receives moderate rainfall, averaging around 70 mm for the month. On average, there are about 15 days with rain during this month.

Average sunshine

With about 168 hours of sunshine, the area enjoys a nice balance of sun and clouds, creating a pleasant environment.

If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Cast. July, August and September typically offer the best circumstances. While January, February and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Cast climate page with graphs.

 

Cast, monthly averages in September

Min Temperature 13°C  

Max Temperature 20°C  

Chance of Rain 50%  

Precipitation 70 mm  

Rainy days 15 days  

Humidity 85% *  

Sunshine 168 hours *  

Percentage Sunshine 45% *  

Data from: Brest, France (38 KM, 23 Miles).

Where to go in France in September

Find out more about the weather in France and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Cast, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

10/10

Walking

10/10

Barbeque

7/10

Camping

8/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Cast.

Our site offers climate and forecast data for every country in the world. Are you going to France? On this website you can find historical weather averages for many cities in France. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.