yearsofweather

Barcelona in September:
comfortably warm,

Barcelona, Spain · Records from 2006 to 2025. Not a forecast.

Mean high27°Hottest day 32.1° (2016)
Mean low19°Coldest night 10.3° (2007)
Rain days6 days1-9 by year
Rainfall83mmDaylight 13.1 → 11.8 h
Barcelona's 12 months iBest: May, June and October
Trip types Beach Finecool seaSightseeing on foot Goodmild and mostly dry
Humidity77%7 muggy days
Clear days6 days5 overcast days
Mean wind9 km/hRarely windy
Sea temperature25.4°25-26.4° by year (last 6)
Sunrise / sunset (15th)07:31 / 20:02Daylight 13.1 → 11.8 h

Barcelona in September

11 September is Catalonia's national day (Diada), and around the 24th the La Mercè festival honours the city's patron saint for about a week, with human towers and fire parades in the streets. The sea is still warm enough to swim, but heavy downpours start to become more frequent.

September in Barcelona was on the warm side, averaging 27°C by day and 19°C at night. With about 6 rain days, showers were an occasional nuisance rather than the rule. Individual years ran between 1 and 9 rain days.

About 2 days a month still climbed past 30°C, the ones where you looked for shade.

Date by date i

‹ August September 2027 October ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
1-4rain on 13% of days28° 21°
5-11rain on 17% of days28° 20°
12-18rain on 25% of days27° 19°
19-25rain on 25% of days26° 18°
26-30rain on 10% of days25° 17°

0-5/206-8/209-11/2012-20/20

1-4rain on 13% of days28° 21°
5-11rain on 17% of days28° 20°
12-18rain on 25% of days27° 19°
19-25rain on 25% of days26° 18°
26-30rain on 10% of days25° 17°
Tap another date to change

200612mm
2007none
20081mm
2009none
20105mm
2011none
2012none
2013none
201415mm
201533mm
20164mm
2017none
2018none
2019none
2020none
2021none
202216mm
2023none
20249mm
202525mm
Holidays in September (2027)
  • September 11 National Day of Catalonia
  • September 24 La Mercè (Barcelona patron saint festival)
  • September 6 Labor Day

1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)

Day by day temperature i

15°21°28°34° 1815222930

Mean high Mean low Coldest to warmest high in 20 years

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
0 d 5 d
2007
1 d 7 d
2008
0 d 4 d
2009
0 d 5 d
2010
0 d 7 d
2011
1 d 3 d
2012
0 d 6 d
2013
2 d 4 d
2014
2 d 9 d
2015
1 d 7 d
2016
1 d 7 d
2017
4 d 8 d
2018
1 d 3 d
2019
2 d 4 d
2020
2 d 4 d
2021
2 d 7 d
2022
1 d 6 d
2023
0 d 1 d
2024
2 d 8 d
2025
2 d 9 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
2
3
2
3
3
3
2
1
6
6
3
6
5
6
5
1
5
7
2
6
6
2
9
7
3
2
1
1
3
3
Rain days on trip
01000102211412221022

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2023 had 1 rain day, 2014 had 9.

Barcelona through the year

MonthHighLowRain daysRainfallSea
January 14°6°4 days43mm 14°
February 15°7°4 days30mm 13°
March 17°9°6 days53mm 14°
April 19°11°6 days53mm 15°
MayGood 22°15°5 days42mm 18°
JuneGood 27°19°3 days19mm 23°
July 29°22°2 days28mm 26°
August 30°22°5 days59mm 27°
September 27°19°6 days83mm 25°
OctoberGood 23°15°6 days83mm 23°
November 18°10°5 days43mm 18°
December 15°7°4 days26mm 16°

Common questions

Does it rain a lot in Barcelona in September?

Over the past 20 years September averaged 6 rain days (1 mm or more) out of 30. Individual years ran from 1 in the driest to 9 in the wettest.

What should I wear in Barcelona in September?

Days averaged 27°C and nights 19°C. Pack a compact umbrella, T-shirts, a light layer for the evenings, sunscreen plus a hat, and a swimsuit.

Can you swim in Barcelona in September?

Sea surface temperature averaged 25.4°C in September, comfortable for swimming. Year to year it ranged 25-26.4°C. Check local flags for waves and jellyfish on the day.

Is September a good time to visit Barcelona?

On warmth and rain days alone, Barcelona's easiest months were May, June and October. September ranked 4 of 12.

Is Barcelona humid in September?

Mean relative humidity was 77%, with about 7 muggy days (dew point of 20°C or more) in the month.