Santorini
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Santorini, Greece

The white houses on the Island of lovers overlooking clear blue waters with small boats sailing, in Santorini, Greece, a small mountain in the distance
The white houses on the Island of lovers overlooking clear blue waters with small boats sailing, in Santorini, Greece, a small mountain in the distance
September, the first month of the autumn, in Santorini, is also a moderately hot month, with average temperature ranging between max 25°C (77°F) and min 20°C (68°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still moderately hot 25°C (77°F). The average low-temperature, in Santorini, Greece, is 20°C (68°F).

Rainfall

In Santorini, during September, the rain falls for 1 days and regularly aggregates up to 13mm (0.5") of precipitation. Throughout the year, there are 65 rainfall days, and 554mm (21.8") of precipitation is accumulated.

Sea temperature

In Santorini, the average seawater temperature in September is 24.6°C (76.3°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.6°C (76.3°F).

Daylight

In Santorini, the average length of the day in September is 12.4h.

Sunshine

The average sunshine in September is 10h.

UV index

The average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for ordinary individuals.
The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Santorini?

The average high-temperature, in September, in Santorini, Greece, is 25°C (77°F), while the average low-temperature is 20°C (68°F).

How much does it rain in Santorini in September?

In Santorini, Greece, in September, during 1 rainfall days, 13mm (0.5") of precipitation is typically accumulated.

What is the sea temperature in September in Santorini?

In September, the average sea temperature in Santorini, Greece, is 24.6°C (76.3°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.6°C (76.3°F) water may be enjoyable.

How many hours of daylight does Santorini have in September?

In September, the average length of the day in Santorini is 12.4h.

How long on average sun shines in September in Santorini?

In September, the average sunshine in Santorini, Greece, is 10h.

How high is the UV index in September in Santorini?

The average daily maximum UV index in September in Santorini, Greece, is 7. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Santorini, Greece
  • Average high temperature in September: 25°C

The warmest month (with the highest average high temperature) is July (28°C).
Months with the lowest average high temperature are January and February (14°C).

  • Average low temperature in September: 20°C

Months with the highest average low temperature are July and August (22°C).
Coldest months (with the lowest average low temperature) are January and February (9°C).

Average rainfall in September - Santorini, Greece
  • Average rainfall in September: 13mm

The wettest month (with the highest rainfall) is January (114mm).
Driest months (with the lowest rainfall) are July and August (1mm).

Average rainfall days in September - Santorini, Greece
  • Average rainfall days in September: 1 days

The month with the highest number of rainy days is December (12 days).
Months with the lowest number of rainy days are June, July, August and September (1 days).

Average sea temperature in September - Santorini, Greece
  • Average sea temperature in September: 24.6°C

The best month for swimming (with the highest average sea temperature) is August (25.7°C).
The coldest month (with the lowest average sea temperature) is February (16.5°C).

Average daylight in September / Average sunshine in September - Santorini, Greece
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 10h

Months with most sunshine are June and July (Average sunshine: 13h).
Months with least sunshine are January and December (Average sunshine: 4).

Average UV index in September - Santorini, Greece
  • Average UV index in September: 7

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).