Heraklion
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Heraklion, Greece

The Venetian walls and the Castle of Koule in the shipyards at Heraklion, Greece
The Venetian walls and the Castle of Koule in the shipyards at Heraklion, Greece
September, the first month of the autumn, in Heraklion, is still a warm month, with temperature in the range of an average high of 26.4°C (79.5°F) and an average low of 20.3°C (68.5°F).
The ideal sea water temperature of 25.4°C (77.7°F) and only 1.3 rainfall days, with 19.5mm (0.77") of accumulated rainfall, makes September the best time for swimming and other water activities.

Temperature

In September, the average high-temperature is practically the same as in August - a still moderately hot 26.4°C (79.5°F). In Heraklion, the average low-temperature is 20.3°C (68.5°F).

Rainfall

In Heraklion, in September, it is raining for 1.3 days, with typically 19.5mm (0.77") of accumulated precipitation. In Heraklion, during the entire year, the rain falls for 53.2 days and collects up to 500.6mm (19.71") of precipitation.

Sea temperature

In Heraklion, the average seawater temperature is 25.4°C (77.7°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

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

Sunshine

The average sunshine in September is 9.4h.

UV index

In Heraklion, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 8 in September transform into the following instructions:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Heraklion?

The average high-temperature, in September, in Heraklion, is 26.4°C (79.5°F), while the average low-temperature is 20.3°C (68.5°F).

How many days does it rain in September in Heraklion?

In Heraklion, in September, it is raining for 1.3 days, with typically 19.5mm (0.77") of accumulated precipitation.

What is the water temperature in September in Heraklion?

In Heraklion, in September, the average water temperature is 25.4°C (77.7°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

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

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

How many hours of sunshine does Heraklion have in September?

In September, the average sunshine in Heraklion, Greece, is 9.4h.

What is the UV index reading in September in Heraklion?

The average daily maximum UV index in September in Heraklion, Greece, is 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Heraklion, Greece
  • Average high temperature in September: 26.4°C

The warmest month (with the highest average high temperature) is July (28.6°C).
The month with the lowest average high temperature is January (15.2°C).

  • Average low temperature in September: 20.3°C

Months with the highest average low temperature are July and August (22.7°C).
Coldest months (with the lowest average low temperature) are January and February (10°C).

Average rainfall in September - Heraklion, Greece
  • Average rainfall in September: 19.5mm

The wettest month (with the highest rainfall) is January (91.5mm).
The driest month (with the lowest rainfall) is August (0.7mm).

Average rainfall days in September - Heraklion, Greece
  • Average rainfall days in September: 1.3 days

The month with the highest number of rainy days is January (10.1 days).
Months with the lowest number of rainy days are July and August (0.1 days).

Average sea temperature in September - Heraklion, Greece
  • Average sea temperature in September: 25.4°C

The best month for swimming (with the highest average sea temperature) is August (26.1°C).
The coldest month (with the lowest average sea temperature) is February (16.4°C).

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

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 9.4h

The month with most sunshine is July (Average sunshine: 12h).
The month with least sunshine is January (Average sunshine: 3.8h).

Average UV index in September - Heraklion, Greece
  • Average UV index in September: 8

The month with the highest UV index is July (UV index 11).
The month with the lowest UV index is December (UV index 2).