Ermoupoli
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Ermoupoli, Greece

The first month of the autumn, September, is also a moderately hot month in Ermoupoli, Greece, with average temperature fluctuating between 19°C (66.2°F) and 25°C (77°F).

Temperature

In Ermoupoli, the average high-temperature in September is relatively the same as in August - a still warm 25°C (77°F). In September, in Ermoupoli, Greece, the average low-temperature is 19°C (66.2°F).

Rainfall

In Ermoupoli, during September, the rain falls for 1 days and regularly aggregates up to 12mm (0.5") of precipitation. Throughout the year, in Ermoupoli, there are 63 rainfall days, and 474mm (18.7") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 24.3°C (75.7°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.3°C (75.7°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

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

Sunshine

In September, the average sunshine is 10h.

UV index

In September, the average daily maximum UV index in Ermoupoli is 7. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for the average person.
The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Ermoupoli?

The average high-temperature, in September, in Ermoupoli, is 25°C (77°F), while the average low-temperature is 19°C (66.2°F).

How much does it rain in Ermoupoli in September?

In Ermoupoli, Greece, in September, during 1 rainfall days, 12mm (0.5") of precipitation is typically accumulated.

What is the water temperature in September in Ermoupoli?

In September, the average sea temperature in Ermoupoli is 24.3°C (75.7°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.3°C (75.7°F) water may be enjoyable.

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

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

How long on average sun shines in September in Ermoupoli?

The average sunshine in September is 10h.

How high is the UV index in September in Ermoupoli?

In September, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in September - Ermoupoli, 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 (13°C).

  • Average low temperature in September: 19°C

The month with the highest average low temperature is July (22°C).
Coldest months (with the lowest average low temperature) are January and February (8°C).

Average rainfall in September - Ermoupoli, Greece
  • Average rainfall in September: 12mm

The wettest month (with the highest rainfall) is December (91mm).
Driest months (with the lowest rainfall) are July and August (2mm).

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

The month with the highest number of rainy days is December (11 days).
Months with the lowest number of rainy days are June, July, August and September (1 days).

Average sea temperature in September - Ermoupoli, Greece
  • Average sea temperature in September: 24.3°C

The best month for swimming (with the highest average sea temperature) is August (25.8°C).
The coldest month (with the lowest average sea temperature) is February (15.6°C).

Average daylight in September / Average sunshine in September - Ermoupoli, 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: 10h

The month with most sunshine is July (Average sunshine: 14h).
Months with least sunshine are January and December (Average sunshine: 4).

Average UV index in September - Ermoupoli, 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).