Bilbao
June to September.
June to September are the best months, with afternoon highs of 23 to 26 degrees and the fewest rain days, 7 to 9 a month. The rest of the year has 10 to 14 rain days a month, and winter highs stay around 14 degrees. Bilbao is not dry in any month, so a light waterproof is useful all year.
Data checked on November 2, 2026
| Month | High | Low | Rainy days | Verdict |
|---|---|---|---|---|
| January | 13.5 °C | 5.3 °C | 12.8 | · |
| February | 14.2 °C | 5.1 °C | 11.1 | · |
| March | 16.6 °C | 6.7 °C | 10.5 | · |
| April | 18.1 °C | 8.1 °C | 12 | · |
| May | 21 °C | 11 °C | 10.3 | · |
| June | 23.5 °C | 13.8 °C | 7.2 | Best |
| July | 25.4 °C | 15.8 °C | 7.4 | Best |
| August | 26.3 °C | 16.1 °C | 7.4 | Best |
| September | 24.5 °C | 13.9 °C | 8.9 | Best |
| October | 21.5 °C | 11.6 °C | 10.7 | · |
| November | 16.6 °C | 8.3 °C | 13.7 | · |
| December | 14.1 °C | 6.1 °C | 12.4 | · |
Climate averages: Agencia Estatal de Meteorología.
9 to 19 °C · about 11 rainy days a month
Highs rise from about 17 degrees in March to 21 in May, with 10 to 12 rain days a month. The hills are green and the days get longer.
What to wear: Wear layers and a waterproof jacket, with shoes that dry quickly.
15 to 25 °C · about 7 rainy days a month
Afternoons reach 23 to 26 degrees, with about 7 rain days a month from June to August. It is the driest period, and the Guggenheim opens until 20:00.
What to wear: Wear light clothes, sunglasses and a thin layer for the evening.
11 to 21 °C · about 11 rainy days a month
September is still warm at about 24 degrees, while October falls to 21 and November to 17. Rain days rise to 11 in October and 14 in November.
What to wear: Bring a waterproof and shoes with grip for wet pavements.
6 to 14 °C · about 12 rainy days a month
Highs are about 14 degrees and lows 5 to 6, with 11 to 13 rain days a month. Days are short, and snow is very rare.
What to wear: Wear a warm coat, a hat and waterproof shoes.
Rain is common, so keep the indoor stops for wet hours. The Guggenheim, the Fine Arts Museum, the Basque Museum, the cathedral and the covered market are all indoors. Use the dry hours for the river walk and the viewpoints.
Summer is mild, but the sun is strong at midday along the river and on the Artxanda hill. Put walks on the quays in the morning or evening and keep museums for the middle of the day. Carry water and a hat on the hill.