WEATHER · CLIMATE NORMALS · 1991–2020
Barcelona Climate — Averages by Month
What the weather in Barcelona, ESaverages across a standard 30-year period. Each month's figure is the 1991–2020 mean temperature and total rainfall from the ERA5 reanalysis — the long-run normal a place settles around, not a forecast for any particular day.
Month-by-month normals
| Month | Avg temperature | Avg rainfall |
|---|---|---|
| January | 8.6 °C · coldest | 43.3 mm |
| February | 9.2 °C | 39.7 mm |
| March | 11.2 °C | 44.0 mm |
| April | 13.3 °C | 56.1 mm |
| May | 16.8 °C | 48.9 mm |
| June | 20.7 °C | 37.7 mm |
| July | 23.4 °C | 28.5 mm |
| August | 23.8 °C · warmest | 43.7 mm |
| September | 20.7 °C | 81.8 mm |
| October | 17.2 °C | 95.1 mm · wettest |
| November | 12.5 °C | 63.7 mm |
| December | 9.3 °C | 44.4 mm |
How to read these numbers
These are reanalysis normals, not readings from a single weather station. They come from the ERA5 0.25° (~25 km) global reanalysis grid, sampled at the grid cell nearest Barcelona — centred at 41.50°N, 2.25°E. A reanalysis blends observations with a physics model onto an even grid, so a coastal or mountain city's cell can read a little cooler, warmer, wetter or drier than the city centre itself. The month-to-month shape — when it's hot, when it rains — is what these normals capture best.
“Normal” means the 1991–2020 average, the current World Meteorological Organization standard period. A normal is what a place tends toward over decades — any single day, month or year can and will depart from it.