September weather forecast
Ermoupoli, Greece

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

Temperature

Ermoupoli marks the start of September with an average high-temperature of a still warm 25°C (77°F), hinting at a slight fluctuation from August's 27°C (80.6°F). An average low-temperature of 19°C (66.2°F) is anticipated throughout the nights during September.

Rainfall

In Ermoupoli, in September, during 1 rainfall days, 12mm (0.47") of precipitation is typically accumulated. In Ermoupoli, during the entire year, the rain falls for 63 days and collects up to 474mm (18.66") of precipitation.

Sea temperature

In September, the average sea temperature is 24.3°C (75.7°F).
Note: Swimming in 24.3°C (75.7°F) water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 25°C (77°F) and 28°C (82.4°F).)

Daylight

In September, the average length of the day in Ermoupoli, Greece, is 12h and 25min.
On the first day of September in Ermoupoli, sunrise is at 06:51 and sunset at 19:49. On the last day of the month, sunrise is at 07:15 and sunset at 19:04 EEST.

Sunshine

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

UV index

The average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Opt for tightly woven and loose clothing to enhance protection from the Sun. Caution! The mirror effect of sand and water ups the UV radiation strength.