Castelldefels Temperature by Month
The average annual maximum temperature in Castelldefels, Catalonia, Spain is 20°C (68°F), with daytime highs ranging from 14°C (57°F) in January to 28°C (82°F) in August. This page covers monthly averages, day-night differences, and how Castelldefels compares to cities worldwide.
Castelldefels Monthly Temperatures
The climate in Castelldefels is dynamic, ranging widely from moderate in winter to comfortable in summer. Nights are significantly colder, with lows dropping from 22°C (72°F) in August to 7°C (45°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Castelldefels by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. August, the warmest month, gets 282 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Castelldefels vs Spain
The map below shows the annual temperature across Spain. You can also select individual months if you want to compare a specific time of year.
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Castelldefels vs World: Temperature Compared
Castelldefels's average annual maximum temperature is 20°C (68°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in Castelldefels?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Castelldefels, January is the coolest month, with average highs of 14°C (57°F) and humidity around 73% — considered high. In August, the warmest month, temperatures average 28°C (82°F) with 72% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Castelldefels this rarely lasts long on the ground.
For more on Castelldefels's weather — including monthly rainfall, sunshine hours, and humidity — visit our Castelldefels climate page.
