September weather forecast
Santorini, Greece

The white houses on the Island of lovers overlooking clear blue waters, Santorini, Greece
The white houses on the Island of lovers overlooking clear blue waters, Santorini, Greece

Weather in September

September, the first month of the autumn in Santorini, is still a warm month, with an average temperature ranging between max 25°C (77°F) and min 20°C (68°F).

Temperature

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

Rainfall

In Santorini, during 1 rainfall days, 13mm (0.51") of precipitation is typically accumulated. Throughout the year, in Santorini, there are 65 rainfall days, and 554mm (21.81") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature in Santorini is 24.6°C (76.3°F).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.6°C (76.3°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

In Santorini, Greece, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 06:49 and sunset at 19:46. On the last day of September, in Santorini, sunrise is at 07:12 and sunset at 19:03 EEST.

Sunshine

The average sunshine in September is 10h.

UV index

The average daily maximum UV index in September in Santorini, Greece, is 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

How many days does it rain in September in Santorini?

In Santorini, in September, during 1 rainfall days, 13mm (0.51") of precipitation is typically accumulated.

How warm is the water in September in Santorini?

In Santorini, in September, the average water temperature is 24.6°C (76.3°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.6°C (76.3°F) water.

What is the average length of the day in September in Santorini?

In Santorini, Greece, the average day length in September is 12h and 25min.

What time are sunrise and sunset in September in Santorini?

On the first day of September in Santorini, Greece, sunrise is at 06:49 and sunset at 19:46. On the last day of the month, sunrise is at 07:12 and sunset at 19:03 EEST.

How many hours of sunshine does Santorini have in September?

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

What is the UV index reading in September in Santorini?

The average daily maximum UV index in September in Santorini is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in September
Santorini, Greece

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).
The months with the lowest average high temperature are January and February (14°C).

  • Average low temperature in September: 20°C

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

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Average rainfall in September
Santorini, Greece

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

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

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Average rainfall days in September
Santorini, Greece

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).
The months with the least rainy days are June, July, August and September (1 days).

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Average sea temperature in September
Santorini, Greece

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).

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Average daylight in September /
Average sunshine in September
Santorini, Greece

Average daylight in September / Average sunshine in September - Santorini, Greece
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 44min).

  • Average sunshine in September: 10h

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

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Average UV index in September
Santorini, Greece

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

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

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