While there are four distinct seasons to the year, they are not at all of equal length if measured by conditions rather than equinoxes: “summer” lasts from May till October (half the year), cooler winter temperatures continue for three months, (December, January and February), and the transitional periods of spring and fall are only represented by the single months of April and November.
Temperatures
The hottest month of the year is August, which has average highs of 29º C (84º F) and average lows of 23º C (74º F). The coldest month is January, with highs averaging 14º C (59º F) and lows averaging 9º C (49º F). April has average highs of 19º C (66º F) and average lows of 13º C (55º F), while November has highs of 18º C (64º F) and lows of 12º C (53º F).
As Barcelona’s position on the Mediterranean coast makes it a haven for swimming and sailing, the sea temperature is of interest to many tourists.
Temperatures tend to be relatively steady in Barcelona, rarely going through drastic fluctuation during the day- and this is especially the case in the summer.
During winter, the warm seawater prevents most frosts, temperatures almost never drop below freezing and snow only falls once or twice in a decade.