Santorini weather in September
September is one of the best months to visit Santorini: highs of 25°C (77°F) and about 18 mm (0.7 in) of rain on average. Nights average 23°C (73°F) and cloud cover 19% (NASA POWER, 2001–2025 averages). The sea averages 25°C (77°F). It is the 4th driest month of the year and the 3rd warmest. Compared with August, it is cooler and wetter; October brings highs of 22°C (72°F) and 44 mm (1.7 in) of rain.
Is September a good time to visit Santorini?
best month Weather score 93/100.
Yes. September is one of the best months for weather in Santorini.
Does it rain a lot in Santorini in September?
No, it is usually dry: about 18 mm (0.7 in) falls in an average September. It is the 4th driest month of the year.
How warm is Santorini in September?
Days average 25°C (77°F) and nights 23°C (73°F).
Santorini weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 15°C (58°F) | 13°C (55°F) | 96 mm | 61% | 18°C (65°F) | least pleasant |
| February | 15°C (58°F) | 13°C (55°F) | 81 mm | 60% | 18°C (64°F) | least pleasant |
| March | 16°C (60°F) | 14°C (57°F) | 44 mm | 51% | 18°C (64°F) | fair |
| April | 18°C (64°F) | 15°C (60°F) | 26 mm | 45% | 18°C (64°F) | fair |
| May | 21°C (69°F) | 18°C (65°F) | 19 mm | 34% | 20°C (67°F) | best |
| June | 25°C (76°F) | 22°C (72°F) | 5 mm | 16% | 23°C (73°F) | best |
| July | 27°C (80°F) | 24°C (75°F) | 2 mm | 9% | 25°C (76°F) | best |
| August | 27°C (81°F) | 25°C (76°F) | 2 mm | 8% | 26°C (79°F) | best |
| September | 25°C (77°F) | 23°C (73°F) | 18 mm | 19% | 25°C (77°F) | best |
| October | 22°C (72°F) | 20°C (68°F) | 44 mm | 36% | 23°C (73°F) | fair |
| November | 19°C (66°F) | 17°C (63°F) | 64 mm | 51% | 21°C (70°F) | fair |
| December | 16°C (61°F) | 14°C (57°F) | 87 mm | 61% | 19°C (67°F) | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months