Weather in September
Temperature
September is characterized by a mild reduction in the average high-temperature, from a tropical 30°C (86°F) in August to a warm 26°C (78.8°F). Throughout the month of September, Posidi expects an average low of 15°C (59°F).Rainfall
In September, in Posidi, the rain falls for 4 days. Throughout September, 35mm (1.38") of precipitation is accumulated. In Posidi, during the entire year, the rain falls for 84 days and collects up to 553mm (21.77") of precipitation.Sea temperature
In Posidi, in September, the average water temperature is 23°C (73.4°F).Note: If someone is sensitive to cold, the enjoyment of swimming in 23°C (73.4°F) water hinges on factors like sunshine, wind, and the current air temperature. (For context: Olympic swimming competitions are held in water temperatures of 25°C (77°F) to 28°C (82.4°F).)
Daylight
The average length of the day in September in Posidi is 12h and 27min.On the first day of the month, sunrise is at 06:54 and sunset at 19:57. On the last day of September, sunrise is at 07:22 and sunset at 19:10 EEST.
Sunshine
In Posidi, Greece, the average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 6 in September translates into this advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Attention! The reflection of both water and sand can increase the intensity of UV rays.
Frequently asked questions
What are the temperatures in Posidi in September?
How many days does it rain in September in Posidi?
What is the sea temperature in September in Posidi?
What is the average length of the day in September in Posidi?
What time are sunrise and sunset in September in Posidi?
How long on average sun shines in September in Posidi?
How high is the UV index in September in Posidi?
Average temperature in September
Posidi, Greece
- Average high temperature in September: 26°C
The warmest months (with the highest average high temperature) are July and August (30°C).
The month with the lowest average high temperature is January (9°C).
- Average low temperature in September: 15°C
The months with the highest average low temperature are July and August (18°C).
The coldest month (with the lowest average low temperature) is January (2°C).
Average rainfall in September
Posidi, Greece
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is December (77mm).
The driest month (with the least rainfall) is July (24mm).
Average rainfall days in September
Posidi, Greece
- Average rainfall days in September: 4 days
The months with the highest number of rainy days are January, November and December (9 days).
The months with the least rainy days are July, August and September (4 days).
Average sea temperature in September
Posidi, Greece
- Average sea temperature in September: 23°C
The best months for swimming (with the highest average sea temperature) are July and August (24°C).
The coldest months (with the lowest average sea temperature) are January, February and March (14°C).
Average daylight in September /
Average sunshine in September
Posidi, Greece
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h
The month with the most sunshine is July (Average sunshine: 12h).
The months with the least sunshine are January, February, November and December (Average sunshine: 4h).
Average UV index in September
Posidi, Greece
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 9).
The months with the lowest UV index are January, November and December (UV index 2).
Posidi, Greece
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