San Sebastián weather in September (Basque Country, Spain)

Thinking of visiting San Sebastián in September? Check the weather first! Want to know if it's a good time to visit? This page has all the weather details for the month.

Temperatures

In September, San Sebastián typically experiences high temperatures and high rainfall. September is part of summer. During the daylight hours, temperatures often reach 22°C. After dark they usually decrease to around 16°C.

Precipitation

San Sebastián in September usually receives high rainfall, averaging around 104 mm for the month. According to historical climate patterns, there are usually around 13 days days of rain.

Average sunshine

The area enjoys a balanced 170 hours of sunlight, ensuring it's neither too overcast nor too sunny.

In case you lean more towards enjoying temperate temperatures and rain-free days June, July and August typically offer the most optimal weather. In contrast, January, February, November and December tend to have less optimal conditions.

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

 

San Sebastián, monthly averages in September

Min Temperature 16°C  

Max Temperature 22°C  

Chance of Rain 43%  

Precipitation 104 mm  

Rainy days 13 days  

Humidity 75%  

Sunshine 170 hours  

Percentage Sunshine  

Where to go in Spain in September

Find out more about the weather in Spain 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 San Sebastián, 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

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Interested in more climate information?

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

Our site offers climate and forecast data for every country in the world. Are you going to Spain? On this website you can find historical weather averages for many cities in Spain. 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.