Hernani offers a quieter Basque perspective just inland from the coast near San Sebastián. Its industrial traditions, local culture and surrounding green hills provide a setting for journeys through smaller towns and winding roads. The destination rewards travellers who look beyond familiar landmarks to discover the everyday character of a region.
Climate
Best time to visit · Jul–Sep
Temperature High / low °C
Daylight Hours a day
Rainfall 1,562 mm a year
Monthly averages for Hernani, 1991–2020.
Best time to visit: when clear, rainless days between 18 and 27 °C are likeliest.
Generated using Copernicus Climate Change Service information 2026 (CC BY 4.0).
Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.
| Month | High °C | Low °C | Rainfall mm | Rainy days | Daylight h |
|---|---|---|---|---|---|
| January | 11° | 6° | 153 | 17 | 9.4 |
| February | 11° | 6° | 139 | 15 | 10.5 |
| March | 13° | 7° | 130 | 15 | 12.0 |
| April | 14° | 9° | 137 | 17 | 13.4 |
| May | 17° | 11° | 126 | 17 | 14.7 |
| June | 20° | 14° | 99 | 14 | 15.3 |
| July | 22° | 16° | 91 | 14 | 15.0 |
| August | 23° | 17° | 93 | 14 | 13.9 |
| September | 21° | 15° | 105 | 14 | 12.5 |
| October | 18° | 13° | 139 | 15 | 11.0 |
| November | 14° | 9° | 194 | 17 | 9.7 |
| December | 11° | 7° | 158 | 16 | 9.0 |