September weather forecastSpetses, Greece
September
Weather in September
The first month of the autumn, September, is still a warm month in Spetses, Greece, with an average temperature ranging between min 21.2°C (70.2°F) and max 26.3°C (79.3°F).Temperature
The arrival of September correlates with a minor temperature reduction, down from August's moderately hot 29.7°C (85.5°F) to a still warm 26.3°C (79.3°F). September nights are marked by an average low-temperature of 21.2°C (70.2°F).Humidity
In Spetses, the average relative humidity in September is 62%.Rainfall
In September, the rain falls for 8.4 days. Throughout September, 20mm (0.79") of precipitation is accumulated. Throughout the year, there are 95.8 rainfall days, and 262mm (10.31") of precipitation is accumulated.Snowfall
March through November are months without snowfall in Spetses.Sea temperature
In Spetses, Greece, the average seawater temperature in September is 25.4°C (77.7°F).Note: Water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm, making water activities enjoyable for prolonged periods without any uncomfortable sensations.
Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 06:58 and sunset at 19:56. On the last day of September, in Spetses, Greece, sunrise is at 07:22 and sunset at 19:12 EEST.
Sunshine
In September, the average sunshine is 9.8h.UV index
In Spetses, 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 radiation for average individuals.Note: In September, the maximum UV index of 6 translates into these guidelines:
Resist overexposure. Safeguarding from solar damage is indispensable. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, Greece
- Average daylight in September: 12h and 24min
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 42min).
- Average sunshine in September: 9h and 48min
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
Spetses, 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
Spetses, 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
Spetses, 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
Spetses, 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).
