Barcelona weather

Our guide to the weather in Barcelona destination during September

26

Average high

5

UV Index

93mm

Monthly rainfall

24

Sea temperature

We've looked at the most up-to-date weather data for Barcelona, covering the last 12 years up to 2022, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Barcelona weather in September.

How warm is it in Barcelona during September?

The temperature reaches around 26℃ during the daytime in September, falling away to 20℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.

Does it rain in Barcelona during September?

On average, there will be 4 rainy days during the month, amounting to 92.9mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a small chance that you'll catch a thunderstorm during your trip.

How warm is the sea in Barcelona during September?

The water temperature around Barcelona reaches a pleasant 24℃ during September. While generally considered warm, some people might find it a little on the cool side on entering the water. The hot air temperature will mean that you will feel comfortably warm when coming out of the water.

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Weather in Barcelona

Our month-by-month guide to the weather and climate in Barcelona

13.2

Barcelona weather in

January
14.0

Barcelona weather in

February
15.7

Barcelona weather in

March
17.6

Barcelona weather in

April
21.2

Barcelona weather in

May
25.5

Barcelona weather in

June
28.3

Barcelona weather in

July
28.5

Barcelona weather in

August
25.7

Barcelona weather in

September
21.9

Barcelona weather in

October
17.2

Barcelona weather in

November
14.2

Barcelona weather in

December