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Castelldefels Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Castelldefels.
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Climate overview of Castelldefels
Castelldefels, Catalonia, Spain, sees big temperature differences between seasons, with August peaking at 28°C (82°F) and January dropping to 14°C (57°F).
With around 654 mm (26 in) of annual rainfall, the city has moderate precipitation levels. October is the wettest month and July the driest. It also has a distinct dry season from June to July, with warm summers and mild winters. The most sunshine falls in July, with an average of 10.4 hours of daily sunshine.
Castelldefels Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castelldefels - and find the best time to visit.
Monthly Temperature in Castelldefels
Visitors to Castelldefels can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in August to a moderate 14°C (57°F) in the coolest month, January.
Nights vary from 22°C (72°F) in August to around 7°C (45°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Castelldefels
Generally, Castelldefels experiences moderate precipitation patterns, averaging 654 mm (26 in) yearly. The climate in Castelldefels shows significant variation throughout the year. Expect moderate rainfall in October, the wettest month, with an average of 98 mm (3.9 in) of precipitation over 11 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 27 mm (1.1 in) of rainfall over 5 rainy days. For more details, please visit our Castelldefels Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Castelldefels
For those who appreciate different seasons, Castelldefels serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.4 hours of sunshine daily, and embrace the darker days in December, offering only 4.6 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Barcelona, Spain (18 KM, 11 Miles).
Daily hours of sunshine
Data from: Barcelona, Spain (18 KM, 11 Miles).
Water Temperature in Castelldefels
The mean water temperature over the year ranges from 13°C (55°F) in January to 24°C (75°F) in August.
Water temperature over the year
Data from: Barcelona, Spain (18 KM, 11 Miles).
Humidity in Castelldefels by Month
The relative humidity is high throughout the year in Castelldefels.
The city experiences its highest humidity in September, reaching 74%. In July, the humidity drops to its lowest level at 69%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Barcelona, Spain (18 KM, 11 Miles).
Wind Speed in Castelldefels
The mean wind speed over the year ranges from 2 m/s (4 knots) in September and October to 4 m/s (8 knots) in March. What does this mean?
The mean monthly wind speed over the year (meters per second)
Data from: Barcelona, Spain (18 KM, 11 Miles).
Best Time to Visit Castelldefels
The most comfortable overall weather for exploring Castelldefels is usually found in May, June, July, August, September and October. Conditions are generally least comfortable in January, February, March and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
good
Feb
good
Mar
good
Apr
very good
May
excellent
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
excellent
Nov
very good
Dec
good
- Best overall: May, June, July, August, September and October
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July
- Best for swimming: June, July, August, September and October.
- Seasonal pattern: A distinct dry season from June to July, with warm summers and mild winters
Frequently asked questions about the climate in Castelldefels
What is the best time to visit Castelldefels?
May, June, July, August, September and October typically offer the most optimal weather in Castelldefels. In contrast, January, February, March and December tend to have less optimal conditions. Castelldefels has a distinct dry season from June to July, with warm summers and mild winters.
What temperatures can I expect in Castelldefels?
Daytime highs range from 14°C (57°F) in January to 28°C (82°F) in August. Nighttime lows range from 7°C (45°F) to 22°C (72°F). Temperatures vary considerably through the year.
How much rain does Castelldefels get?
Annual rainfall is around 654 mm (26 in). October is the wettest month with 98 mm (3.9 in), while July is the driest with 27 mm (1.1 in).
How sunny is Castelldefels?
Castelldefels receives around 2,510 hours of sunshine per year. July is the sunniest month with 311 hours, while December is the cloudiest with just 137 hours. Overall, Castelldefels enjoys abundant sunshine.
Castelldefels 3-Day Forecast
Castelldefels on the map
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