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 snowfall in September
- Average snowfall 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
During the shift to September, Poros records a mild decrease in average high-temperature, moving from 29.7°C (85.5°F) in August to a still warm 26.3°C (79.3°F). Poros experiences a consistent average temperature of 21.2°C (70.2°F) throughout the nights in September.Humidity
In September, the average relative humidity in Poros is 62%.Rainfall
In Poros, in September, it is raining for 8.4 days, with typically 20mm (0.79") of accumulated precipitation. In Poros, during the entire year, the rain falls for 95.8 days and collects up to 262mm (10.31") of precipitation.Snowfall
March through November are months without snowfall.Sea temperature
In September, the average sea temperature is 25.4°C (77.7°F).Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.
Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 06:56 and sunset at 19:55. On the last day of the month, sunrise is at 07:21 and sunset at 19:10 EEST.
Sunshine
The average sunshine in September is 9.8h.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: In September, the maximum UV index of 6 transforms into these recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Caution! The reflection of sand and water significantly amplifies 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 Poros in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the sea water temperature in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Poros have in September?
What is the UV index reading in September?
Average temperature in September
Poros, Greece
- Average high temperature in September: 26.3°C
The warmest month (with the highest average high temperature) is August (29.7°C).
The month with the lowest average high temperature is January (12.6°C).
- Average low temperature in September: 21.2°C
The month with the highest average low temperature is August (24.2°C).
The coldest month (with the lowest average low temperature) is January (8.6°C).
Average pressure in September
Poros, Greece
- Average pressure in September: 1014.4mbar
The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is July (1011.3mbar).
Average wind speed in September
Poros, Greece
- Average wind speed in September: 12km/h
The windiest month (with the highest average wind speed) is January (14.6km/h).
The calmest month (with the lowest average wind speed) is May (11.1km/h).
Average humidity in September
Poros, Greece
- Average humidity in September: 62%
The months with the highest relative humidity are January and February (72%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Poros, Greece
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is December (36mm).
The driest months (with the least rainfall) are July and August (6mm).
Average rainfall days in September
Poros, Greece
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is January (10.8 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in September
Poros, Greece
- Average snowfall in September: 0mm
The month with the highest snowfall is January (5mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Poros, Greece
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Poros, Greece
- Average sea temperature in September: 25.4°C
The best month for swimming (with the highest average sea temperature) is August (26.5°C).
The coldest month (with the lowest average sea temperature) is February (15.3°C).
Average daylight in September /
Average sunshine in September
Poros, Greece
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in September
Poros, Greece
- Average sunshine days in September: 19.7 days
The month with the most sunshine days is July (27 days).
The month with the least sunshine days is January (16.5 days).
Average UV index in September
Poros, Greece
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Poros, Greece
- Average cloud cover in September: 15
The months with the most cloud cover are January and February (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Poros, 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).
