Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition from August to September brings an average high-temperature of a still warm 24.9°C (76.8°F), barely different from August's 26.8°C (80.2°F). September nights experience a minor temperature downturn to a still warm 23.4°C (74.1°F).Humidity
In Astypalaia, the average relative humidity in September is 71%.Rainfall
In Astypalaia, in September, it is raining for 4.1 days, with typically 16mm (0.63") of accumulated precipitation. Throughout the year, there are 94.2 rainfall days, and 485mm (19.09") of precipitation is accumulated.Sea temperature
In Astypalaia, Greece, in September, the average water temperature is 24.2°C (75.6°F).Note: For someone not comfortable with cold, swimming in 24.2°C (75.6°F) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.
Daylight
In September, the average length of the day in Astypalaia, Greece, is 12h and 25min.On the first day of September in Astypalaia, sunrise is at 06:46 and sunset at 19:42. On the last day of the month, sunrise is at 07:09 and sunset at 18:59 EEST.
Sunshine
In September, the average sunshine is 11.3h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.Note: A typical high UV index of 6 in September suggests the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Stay sun-safe with clothing that is both closely woven and worn loosely. Caution! Sand and water reflections can notably increase the UV radiation intensity.
Frequently asked questions
What are the temperatures in Astypalaia in September?
What is the average humidity in September in Astypalaia?
How many days does it rain in September in Astypalaia?
What is the sea temperature in September in Astypalaia?
How many hours of daylight does Astypalaia have in September?
What time are sunrise and sunset in September in Astypalaia?
How many hours of sunshine does Astypalaia have in September?
What is the UV index reading in September in Astypalaia?
Average temperature in September
Astypalaia, Greece
- Average high temperature in September: 24.9°C
The warmest month (with the highest average high temperature) is August (26.8°C).
The month with the lowest average high temperature is January (14.5°C).
- Average low temperature in September: 23.4°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (12.4°C).
Average pressure in September
Astypalaia, Greece
- Average pressure in September: 1011.9mbar
The month with the highest atmospheric pressure is December (1017.5mbar).
The month with the lowest atmospheric pressure is July (1007.6mbar).
Average wind speed in September
Astypalaia, Greece
- Average wind speed in September: 22.9km/h
The windiest month (with the highest average wind speed) is January (28.8km/h).
The calmest month (with the lowest average wind speed) is May (18.1km/h).
Average humidity in September
Astypalaia, Greece
- Average humidity in September: 71%
The month with the highest relative humidity is June (74%).
The months with the lowest relative humidity are January, November and December (68%).
Average rainfall in September
Astypalaia, Greece
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is December (106mm).
The driest months (with the least rainfall) are July and August (1mm).
Average rainfall days in September
Astypalaia, Greece
- Average rainfall days in September: 4.1 days
The month with the highest number of rainy days is January (15.3 days).
The month with the least rainy days is August (0.4 days).
Average sea temperature in September
Astypalaia, Greece
- Average sea temperature in September: 24.2°C
The best month for swimming (with the highest average sea temperature) is August (24.9°C).
The coldest months (with the lowest average sea temperature) are February and March (16.8°C).
Average daylight in September /
Average sunshine in September
Astypalaia, Greece
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in September
Astypalaia, Greece
- Average sunshine days in September: 25.2 days
The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is February (13.7 days).
Average UV index in September
Astypalaia, Greece
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).
Average cloud cover in September
Astypalaia, Greece
- Average cloud cover in September: 7
The month with the most cloud cover is January (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 2).
Average visibility in September
Astypalaia, Greece
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Astypalaia, Greece
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