Temperature
Cool by day, brisk at night.
Alonnisos is usually most comfortable in June and September. Typical daytime highs range from 49–75°F across the year. Most months see little rain.

Cool by day, brisk at night.
Several rainy days. About 7 wet days, more than in most months.
Good sunshine this month.
In November, afternoons feel about 49° and nights feel near 48°.
Partly cloudy skies this month.
Breezy November days can feel brisker in open spots.
November stays around 56°F through the day and night.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 49 | 46 | 2.9 | 11 | 6.8 | 70 |
| Feb | 49 | 46 | 2.3 | 9 | 8.1 | 70 |
| Mar | 51 | 48 | 2.1 | 8 | 9.6 | 71 |
| Apr | 55 | 52 | 1.1 | 5 | 11.5 | 75 |
| May | 62 | 59 | 1.2 | 4 | 12.6 | 77 |
| Jun | 70 | 67 | 0.4 | 2 | 14.1 | 75 |
| Jul | 74 | 72 | 0.5 | 2 | 13.7 | 71 |
| Aug | 75 | 73 | 0.5 | 2 | 12.9 | 70 |
| Sep | 70 | 67 | 1.3 | 4 | 11.3 | 69 |
| Oct | 64 | 61 | 1.8 | 6 | 9.1 | 71 |
| Nov | 57 | 54 | 2.0 | 7 | 7.6 | 73 |
| Dec | 51 | 48 | 3.2 | 10 | 6.4 | 71 |
Similar climates
Want a side-by-side climate view? Compare Alonnisos with Barcelona.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology