Barcelona is warmest in August, averaging 31° by day and 20° at night. The wettest month is November with 84 mm, and the year brings about 587 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 13° | 4° | 40 mm | 14° | 9.3 h | Mild |
| February | 16° | 4° | 17 mm | 13° | 10.4 h | Mild |
| March | 17° | 6° | 50 mm | 13° | 11.7 h | Sightseeing |
| April | 19° | 9° | 69 mm | 15° | 13.1 h | Sightseeing |
| May | 24° | 12° | 43 mm | 18° | 14.3 h | Sightseeing |
| June | 27° | 17° | 54 mm | 22° | 15.0 h | Beach weather |
| July | 31° | 20° | 28 mm | 25° | 14.7 h | Beach weather |
| August | 31° | 20° | 37 mm | 27° | 13.7 h | Beach weather |
| September | 27° | 17° | 66 mm | 25° | 12.3 h | Beach weather |
| October | 23° | 14° | 62 mm | 22° | 10.9 h | Sightseeing |
| November | 18° | 9° | 84 mm | 18° | 9.6 h | Sightseeing |
| December | 15° | 5° | 37 mm | 15° | 9.0 h | Mild |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: June, July, August and September — highs around 29°, nights no colder than 17°, and at most 66 mm of rain in a month. The sea sits at 22–27° then.
Walking the city: March, April, May, October and November — highs of 17–24° and no more than 84 mm of rain a month.