

Bilbao has an oceanic climate, creating generally mild temperatures through most of the year. It is humid and rains frequently, most often in spring and autumn. There may be a few days of light snow in the winter, and summers are moderately hot.
Average monthly highs and lows (ºF) and rainfall (inches) in Bilbao:
| Type | Jan | Feb | Mar | Apr | May | June | Jul | Aug | Sept | Oct | Nov | Dec |
| Highs | 56 | 57 | 62 | 63 | 69 | 73 | 77 | 78 | 76 | 70 | 61 | 57 |
| Lows | 43 | 43 | 45 | 47 | 52 | 56 | 60 | 61 | 58 | 54 | 48 | 45 |
| Avg. Rainfall | 2.7 | 2.28 | 1.91 | 3.17 | 1.85 | 1.5 | 1.56 | 1.53 | 1.73 | 2.95 | 3.66 | 2.87 |
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