Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September signifies a gentle decline in Barcelona's average high-temperature, easing from 27.5°C (81.5°F) in August to a still warm 24.5°C (76.1°F). September brings with it a nighttime average temperature of 19.2°C (66.6°F) in Barcelona.Humidity
The average relative humidity in September is 71%.Rainfall
In Barcelona, during September, the rain falls for 13.8 days and regularly aggregates up to 48mm (1.89") of precipitation. In Barcelona, during the entire year, the rain falls for 117.9 days and collects up to 435mm (17.13") of precipitation.Snowfall
January, February and September are months with snowfall in Barcelona. The months with the most snowfall are January, February and September, with an average 1mm (0.04") of accumulated snow.Sea temperature
In Barcelona, in September, the average water temperature is 24.2°C (75.6°F).Note: If you're wary of the cold, the surrounding conditions—sunshine, wind, and air temperature become crucial when swimming in 24.2°C (75.6°F) waters. Olympic standards, for reference, are set between 25°C (77°F) and 28°C (82.4°F).
Daylight
In September, the average length of the day in Barcelona is 12h and 28min.On the first day of September in Barcelona, sunrise is at 07:18 and sunset at 20:24. On the last day of the month, sunrise is at 07:47 and sunset at 19:34 CEST.
Sunshine
In Barcelona, the average sunshine in September is 9.1h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index in Barcelona. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the temperature in September in Barcelona?
What is the average humidity in September in Barcelona?
How much does it rain in Barcelona in September?
What is the snowiest month in Barcelona?
When does it start to snow in Barcelona?
What is the sea temperature in September in Barcelona?
How many hours of daylight does Barcelona have in September?
When is the sunrise / sunset in September in Barcelona?
How many hours of sunshine does Barcelona have in September?
What is the month with the highest UV index in Barcelona?
How high is the UV index in September in Barcelona?
Average temperature in September
Barcelona, Spain
- Average high temperature in September: 24.5°C
The warmest month (with the highest average high temperature) is August (27.5°C).
The month with the lowest average high temperature is January (12.4°C).
- Average low temperature in September: 19.2°C
The month with the highest average low temperature is August (22.1°C).
The coldest month (with the lowest average low temperature) is February (7.1°C).
Average pressure in September
Barcelona, Spain
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1014.7mbar).
Average wind speed in September
Barcelona, Spain
- Average wind speed in September: 9.6km/h
The windiest month (with the highest average wind speed) is March (12.1km/h).
The calmest month (with the lowest average wind speed) is August (9.3km/h).
Average humidity in September
Barcelona, Spain
- Average humidity in September: 71%
The months with the highest relative humidity are April and October (72%).
The months with the lowest relative humidity are February, June and November (68%).
Average rainfall in September
Barcelona, Spain
- Average rainfall in September: 48mm
The wettest month (with the highest rainfall) is October (73mm).
The driest month (with the least rainfall) is February (16mm).
Average rainfall days in September
Barcelona, Spain
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is September (13.8 days).
The month with the least rainy days is December (6.4 days).
Average snowfall in September
Barcelona, Spain
- Average snowfall in September: 1mm
The months with the highest snowfall are January, February and September (1mm).
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0mm).
Average snowfall days in September
Barcelona, Spain
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, October, November and December (0 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: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are June and July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Barcelona, Spain
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is September (12.3 days).
Average UV index in September
Barcelona, Spain
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Barcelona, Spain
- Average cloud cover in September: 24
The month with the most cloud cover is April (Cloud cover 31).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in September
Barcelona, Spain
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Barcelona, Spain
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