San Sebastian
Spain · Europe
Year-round range: 44°F to 74°F
May
Excellent conditions this month
Expect the month to feel wet and cloudy overall; any bright breaks do not cancel out the frequent rain.
Beach conditions are warm, but cloud cover is fairly high, so this is less of a classic blue-sky month.
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
May has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = MayPrecipitation
Monthly precipitation, wet-day risk, and snow signal where relevant.
May is one of the wetter months — pack rain gear.
Sunshine
Average hours of bright sun per day.
Expect the month to feel wet and cloudy overall; any bright breaks do not cancel out the frequent rain.
Clear sky
Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.
Air comfort by month
Humidity and heat feel by month.
May is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for May.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In May, afternoons reach about 65° and nights settle near 57°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity | Sea °F |
|---|---|---|---|---|---|---|---|
| Jan | 52°F | 44°F | 16 | 5.1in | 2.9h | 78.85714285714285% | 54°F |
| Feb | 54°F | 44°F | 12 | 3.7in | 3.7h | 76% | 53°F |
| Mar | 57°F | 47°F | 12 | 3.7in | 4.3h | 73.85714285714285% | 54°F |
| Apr | 60°F | 49°F | 12 | 3.4in | 4.8h | 75.85714285714285% | 55°F |
| May | 65°F | 54°F | 11 | 3.4in | 5.3h | 79.14285714285714% | 59°F |
| Jun | 70°F | 59°F | 9 | 3.1in | 5.7h | 80.42857142857143% | 64°F |
| Jul | 73°F | 63°F | 12 | 1.9in | 6.5h | 81% | 69°F |
| Aug | 74°F | 64°F | 13 | 2.3in | 6.3h | 79.42857142857142% | 70°F |
| Sep | 71°F | 61°F | 9 | 2.9in | 5.5h | 77.99999999999999% | 68°F |
| Oct | 67°F | 57°F | 12 | 3.8in | 4.3h | 76.14285714285714% | 64°F |
| Nov | 58°F | 50°F | 19 | 6.2in | 3.2h | 78.14285714285714% | 60°F |
| Dec | 54°F | 46°F | 15 | 4.9in | 2.9h | 79.14285714285714% | 56°F |
Similar destinations
Planning notes
Expect some rain.