Poros
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Poros, Greece

The first month of the autumn, September, is also a moderately hot month in Poros, Greece, with average temperature varying between 16°C (60.8°F) and 26°C (78.8°F).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 29°C (84.2°F) in August, to a still warm 26°C (78.8°F). In Poros, in September, the average low-temperature is 16°C (60.8°F).

Rainfall

In September, the rain falls for 4 days. Throughout September, 41mm (1.6") of precipitation is accumulated. In Poros, during the entire year, the rain falls for 105 days and collects up to 996mm (39.2") of precipitation.

Sea temperature

In Poros, the average seawater temperature in September 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.

Daylight

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

Sunshine

In September, the average sunshine in Poros is 9h.

UV index

The average daily maximum UV index in Poros, Greece, is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation for the average person.
The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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 Poros?

The average high-temperature, in September, in Poros, is 26°C (78.8°F), while the average low-temperature is 16°C (60.8°F).

How many days does it rain in September in Poros?

In Poros, in September, it is raining for 4 days, with typically 41mm (1.6") of accumulated precipitation.

What is the water temperature in September in Poros?

In September, the average sea temperature in Poros is 25.4°C (77.7°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

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

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

How many hours of sunshine does Poros have in September?

The average sunshine in September is 9h.

What is the UV index reading in September in Poros?

In September, the average daily maximum UV index in Poros, Greece, is 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Poros, Greece
  • Average high temperature in September: 26°C

The warmest month (with the highest average high temperature) is July (30°C).
Months with the lowest average high temperature are January and February (12°C).

  • Average low temperature in September: 16°C

Months with the highest average low temperature are July and August (18°C).
Coldest months (with the lowest average low temperature) are January and February (5°C).

Average rainfall in September - Poros, Greece
  • Average rainfall in September: 41mm

The wettest month (with the highest rainfall) is December (186mm).
The driest month (with the lowest rainfall) is July (11mm).

Average rainfall days in September - Poros, Greece
  • Average rainfall days in September: 4 days

The month with the highest number of rainy days is December (15 days).
Months with the lowest number of rainy days are July and August (2 days).

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

The best month for swimming (with the highest average sea temperature) is August (26.5°C).
The coldest month (with the lowest average sea temperature) is February (15.3°C).

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

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 9h

The month with most sunshine is July (Average sunshine: 13h).
The month with least sunshine is December (Average sunshine: 4h).

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

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