Astypalaia
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Astypalaia, Greece

The first month of the autumn, September, is still a warm month in Astypalaia, Greece, with temperature in the range of an average low of 20°C (68°F) and an average high of 28°C (82.4°F).

Temperature

In September, the average high-temperature marginally drops, from a tropical 31°C (87.8°F) in August, to a moderately hot 28°C (82.4°F). The average low-temperature, in Astypalaia, Greece, is 20°C (68°F).

Rainfall

In Astypalaia, Greece, in September, it is raining for 2 days, with typically 15mm (0.59") of accumulated precipitation. In Astypalaia, during the entire year, the rain falls for 72 days and collects up to 719mm (28.31") of precipitation.

Sea temperature

In Astypalaia, the average water temperature is 24.2°C (75.6°F).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.2°C (75.6°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

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

Sunshine

In September, the average sunshine is 11h.

UV index

In Astypalaia, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in September transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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 Astypalaia?

In Astypalaia, Greece, in September, the average high-temperature is 28°C (82.4°F), and the average low-temperature is 20°C (68°F).

How much does it rain in Astypalaia in September?

In Astypalaia, Greece, during September, the rain falls for 2 days and regularly aggregates up to 15mm (0.59") of precipitation.

How warm is the water in September in Astypalaia?

In Astypalaia, in September, the average water temperature is 24.2°C (75.6°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.2°C (75.6°F) water may be enjoyable.

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

The average length of the day in September is 12.4h.

How long on average sun shines in September in Astypalaia?

The average sunshine in September is 11h.

What is the UV index reading in September in Astypalaia?

The average daily maximum UV index in September in Astypalaia, Greece, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Astypalaia, Greece
  • Average high temperature in September: 28°C

Warmest months (with the highest average high temperature) are July and August (31°C).
The month with the lowest average high temperature is January (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 (8°C).

Average rainfall in September - Astypalaia, Greece
  • Average rainfall in September: 15mm

The wettest month (with the highest rainfall) is January (164mm).
The driest month (with the lowest rainfall) is July (0mm).

Average rainfall days in September - Astypalaia, Greece
  • Average rainfall days in September: 2 days

Months with the highest number of rainy days are January and December (11 days).
Months with the lowest number of rainy days are July and August (1 days).

Average sea temperature in September - Astypalaia, Greece
  • Average sea temperature in September: 24.2°C

The best month for swimming (with the highest average sea temperature) is August (24.9°C).
Coldest months (with the lowest average sea temperature) are February and March (16.8°C).

Average daylight in September / Average sunshine in September - Astypalaia, 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: 11h

The month with most sunshine is July (Average sunshine: 14h).
Months with least sunshine are January, February and December (Average sunshine: 5).

Average UV index in September - Astypalaia, 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).