Weather in Barcelona in September 2025
Average weather
Average temperature in Barcelona in September
Going from a maximum of +30°C during the day to a minimum of +17°C during the night, the temperature in September averages around +27°C.
The average maximum temperature goes up 8% by the end of the month, compared with the beginning of the month, from +28°C to +29°C.
Is Barcelona warm or cold in September?
Barcelona is typically warm in September.
Maximum temperatures go down compared to the previous month from +27°C to +25°C. The minimum temperature also goes down from +22°C to +19°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Barcelona, here is the comparison with other months:
Water temperature in Barcelona in September
Water in Barcelona in September is Comfortable. It varies from +21°C to +26°C, with an average of +24°C. This is almost similar to the air temperature, which averages +25°C.
The water temperature in September is one of the warmest of the entire year:
Can you swim in Barcelona in September?
Climate in Barcelona in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +27°C | +25°C | +21°C | ||||
| Min. temperature | ||||||
| +16°C | +12°C | +5°C | ||||
| Max. temperature | ||||||
| +36°C | +32°C | +30°C | ||||
| Rainfall | ||||||
| 55 mm | 82 mm | 85 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +24°C | +24°C | +21°C | ||||
| Humidity | ||||||
| 70% | 72% | 74% | ||||
| Air pressure | ||||||
| 1015 HPa | 1015 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 13 | 9 | 8 | ||||
| Cloudy days | ||||||
| 6 | 6 | 8 | ||||
| Rainy days | ||||||
| 8 | 10 | 11 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting colder in September. From +27°C in the day, the average maximum temperature lowers to +25°C. Prepare for more rain. Average rainfall goes from 55 mm to 82 mm. Humidity rises from 70% to 72%. Winds are stronger in comparison to August, going up from 2 m/s to 3 m/s on average. The days becoming less sunny, going from 13 sunny days in August to 9 in September.
October brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 9 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Barcelona is gradually decreasing during September, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Barcelona?
Climate Change over Years
The climate in Barcelona in September has not changed much over the last 43 years.
The average temperature was the lowest in 1984 (+18°C) and the highest in 2022 (+22°C). The driest year was 1990 with only 378 mm of rainfall, and the wettest year was 2020 with 1436 mm.
FAQ
Is September a good time to visit Barcelona?
Can you sunbathe in Barcelona in September?
Can you swim in Barcelona in September?
Is Barcelona rainy in September?
Is it sunny in Barcelona in September?
Other cities in Spain
Monthly weather in Barcelona
Source of the data
For this page, we’ve looked at the typical weather in Barcelona, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.