20-Year Climate Average
Santorini, South Aegean, Greece Weather in September
Normal High
78°F
Normal Low
72°F
Rainy Days
~3 of the month
Chance of Rain
9%
Humidity
69%
UV index
Not available
Daylight
12.4 hours
Peak wind
18 mph
Usually good for: walking and sightseeing, beaches and outdoor dining, running and hiking.
Based on September climate records from 2006–2025 (Open-Meteo Historical Weather Archive). These are planning averages, not a forecast. Data: Open-Meteo.com, CC BY 4.0.
Current conditions
Forecast versus the climate baseline
66°F
It currently feels like 63°F with 70% humidity, a 56°F dew point and 11 mph wind. Climate averages describe the month; this live reading is what matters for plans today.
73° / 66° · 0% rain
72° / 66° · 0% rain
73° / 65° · 0% rain
Best Months to Visit Santorini, South Aegean, Greece
Ranked by historical rainy-day frequency — the driest months over the past 20 years.
Methodology
Monthly values use the 2001–2020 observation period. Temperature, precipitation, humidity or dew point, wind, UV and daylight are shown only when the selected source provides them; unavailable fields are never estimated or silently replaced. These are planning normals, not guarantees for a specific trip.
What is the weather like in Santorini, South Aegean, Greece in September?
The 20-year average high in Santorini, South Aegean, Greece in September is 78°F, with a low around 72°F and about 3 rainy days.