Barcelona, Spain is most comfortable in January, February, March. The toughest month for heat is August (comfort 18/100). In August, daytime highs average 29.2°C (feels like 31.9°C) with 11.6 days over 30°C and 24.4 tropical nights.
| Month | Avg high | Avg low | Feels like | Days ≥30°C | Days ≥35°C | Nights ≥20°C | Comfort |
|---|---|---|---|---|---|---|---|
| January | 13.9° | 4.6° | 11.3° | 0 | 0 | 0 | 100 |
| February | 15.1° | 6.4° | 13° | 0 | 0 | 0 | 100 |
| March | 15.9° | 8.4° | 13.8° | 0 | 0 | 0 | 100 |
| April | 18° | 9.8° | 16.7° | 0 | 0 | 0 | 100 |
| May | 21.4° | 13.5° | 21.6° | 0.2 | 0 | 0 | 100 |
| June | 26.7° | 19.3° | 28.2° | 3.8 | 0 | 12.8 | 60 |
| July | 28.7° | 21.3° | 30.9° | 7.8 | 0.4 | 24.6 | 29 |
| August | 29.2° | 21.5° | 31.9° | 11.6 | 0.6 | 24.4 | 18 |
| September | 25.5° | 18.1° | 26.9° | 0.4 | 0 | 7.6 | 76 |
| October | 22.6° | 15.2° | 22.9° | 0 | 0 | 0.2 | 100 |
| November | 18° | 9.8° | 16.4° | 0 | 0 | 0 | 100 |
| December | 15.3° | 6.2° | 13.4° | 0 | 0 | 0 | 100 |
Destinations scoring 75+ for August heat comfort:
It's hot but manageable. August daytime highs in Barcelona average 29.2°C with 11.6 days over 30°C. Plan outdoor sightseeing for mornings and evenings.
Based on 5 years of climate data, the most comfortable months in Barcelona are January, February, March. The toughest month for heat is August, scoring 18/100 on our heat-comfort index.
In August, nights in Barcelona average a low of 21.5°C, with 24.4 tropical nights per month (nights that stay at or above 20°C) — a key factor for sleep quality if your stay has no air conditioning.
Tell us where and when you're going. If a heatwave becomes likely for your dates, we'll email you early — with cooler day-by-day alternatives nearby.