September weather forecast
Polychrono, Greece

The first month of the autumn, September, is also a moderately hot month in Polychrono, Greece, with an average temperature varying between 15°C (59°F) and 26°C (78.8°F).

Temperature

The start of September comes with a small reduction in the average high-temperature, subtly receding from 29°C (84.2°F) in August to a still warm 26°C (78.8°F). Nighttime temperatures in September average to a moderate 15°C (59°F).

Rainfall

In September, the rain falls for 4 days. Throughout September, 34mm (1.34") of precipitation is accumulated. Throughout the year, in Polychrono, there are 84 rainfall days, and 562mm (22.13") of precipitation is accumulated.

Sea temperature

In Polychrono, the average seawater temperature in September is 23°C (73.4°F).
Note: The allure of a swim in 23°C (73.4°F) waters can be influenced by your feelings towards the cold, today's sunshine, the wind's touch, and the ambient warmth. To put it in perspective, Olympic standards demand water temperatures of 25°C (77°F) to 28°C (82.4°F).

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of September in Polychrono, sunrise is at 06:54 and sunset at 19:57. On the last day of the month, sunrise is at 07:21 and sunset at 19:09 EEST.

Sunshine

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

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high UV index of 6 in September translates into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.