Verdict: Excellent month
Santorini Weather in September
September runs warm in Santorini, with daily highs around 28°C (82°F) and nights near 23°C (73°F). Rain is a non-issue, with only ~1 wet day in an average year. Overall, September is one of the best months of the year to be in Santorini.
Average high
28°C / 82°F
Average low
23°C / 73°F
Rain days
~1
Precipitation
5 mm
What to pack for Santorini in September
- Summer clothes, plus one light layer for air-con and evenings
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Santorini: Jul (30°C / 86°F) · Coolest: Jan (15°C / 59°F) · Wettest: Dec (~9 rain days)
15°
12°
Jan
16°
12°
Feb
16°
12°
Mar
20°
15°
Apr
23°
18°
May
28°
22°
Jun
30°
24°
Jul
30°
25°
Aug
28°
23°
Sep
24°
20°
Oct
20°
16°
Nov
17°
14°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)