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
September
Weather in September
Temperature
Transitioning into September, Astypalaia records an average high-temperature of a still moderately hot 24.9°C (76.8°F), almost identical to August's 26.8°C (80.2°F). Registering an almost steady temperature, Astypalaia's nights in September see an average low of 23.4°C (74.1°F).Humidity
In Astypalaia, the average relative humidity in September is 71%.Rainfall
In Astypalaia, in September, during 4.1 rainfall days, 16mm (0.63") of precipitation is typically accumulated. Throughout the year, in Astypalaia, there are 94.2 rainfall days, and 485mm (19.09") of precipitation is accumulated.Sea temperature
In September, the average sea temperature is 24.2°C (75.6°F).Note: If someone is sensitive to cold, the enjoyment of swimming in 24.2°C (75.6°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
In Astypalaia, the average length of the day in September is 12h and 25min.On the first day of September, 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 Astypalaia, the average sunshine in September is 11.3h.UV index
In Astypalaia, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 suggests these recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Astypalaia in September?
What is the average humidity in September?
How many days does it rain in September?
What is the water temperature in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
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).
