September weather forecast and climate
Barcelona, Spain

The artistic Park Gull fronted by Gaudi, the architect, in Barcelona, Spain, on a beautiful summer day
The artistic Park Gull fronted by Gaudi, the architect, in Barcelona, Spain, on a beautiful summer day
September sees the closure of summer with a relatively high humidity score of 65% across most days.
The temperatures drop to read between 18°C (64.4°F) on the coldest days and 26°C (78.8°F) on the warmest days, making September more pleasant than the other summer months with bearable temperatures.
The arrival of autumn is relatively rainy, causing the rise in rainfall to noteworthy five days with gauge meters reading 76.2mm (3"). The daily sunshine hours drop to eight, but the sea is still pleasurable for swimming as the sea measures an average of 24°C (75.2°F).

What is the temperature in September in Barcelona?

The average high-temperature, in September, in Barcelona, Spain, is 26°C (78.8°F), while the average low-temperature is 20°C (68°F).

How many days does it rain in September in Barcelona?

In Barcelona, in September, during 8 rainfall days, typically, 81.9mm (3.2") of precipitation is accumulated.

What is the sea temperature in September in Barcelona?

The average seawater temperature, in September, in Barcelona, is 24.2°C (75.6°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.2°C (75.6°F) water may be enjoyable. The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).
Average temperature in September - Barcelona, Spain
  • Average high temperature in September: 26°C

The warmest month (with the highest average high temperature) is August (29°C).
The month with the lowest average high temperature is January (14.8°C).

  • Average low temperature in September: 20°C

The month with the highest average low temperature is August (23.1°C).
The coldest month (with the lowest average low temperature) is January (8.8°C).

Average rainfall in September - Barcelona, Spain
  • Average rainfall in September: 81.9mm

The wettest month (with the highest rainfall) is October (96.5mm).
The driest month (with the lowest rainfall) is July (25.1mm).

Average rainfall days in September - Barcelona, Spain
  • Average rainfall days in September: 8 days

Months with the highest number of rainy days are September and October (8 days).
The month with the lowest number of rainy days is July (3.1 days).

Average sea temperature in September - Barcelona, Spain
  • Average sea temperature in September: 24.2°C

The best month for swimming (with the highest average sea temperature) is August (25.3°C).
The coldest month (with the lowest average sea temperature) is February (13.1°C).

Average daylight in September / Average sunshine in September - Barcelona, Spain
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 7.6h

The month with most sunshine is June (Average sunshine: 9.6h).
The month with least sunshine is December (Average sunshine: 4.4h).

Average UV index in September - Barcelona, Spain
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
The month with the lowest UV index is December (UV index 1).

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