September weather forecastIos, Greece
September
Weather in September
September, the first month of the autumn in Ios, is still a warm month, with an average temperature fluctuating between 24.5°C (76.1°F) and 23.3°C (73.9°F).Temperature
September commences with an average high-temperature of a still moderately hot 24.5°C (76.1°F), showing little deviation from August's 25.9°C (78.6°F). Ios's September nights witness minimal differential from the daytime temperatures, with averages of 23.3°C (73.9°F).Humidity
The average relative humidity in September is 73%.Rainfall
In September, the rain falls for 4.5 days. Throughout September, 8mm (0.31") of precipitation is accumulated. In Ios, during the entire year, the rain falls for 87.8 days and collects up to 221mm (8.7") of precipitation.Sea temperature
In Ios, the average seawater temperature in September is 23°C (73.4°F).Note: Swimming in 23°C (73.4°F) waters may not appeal to those sensitive to cold. Yet, the presence of sunshine, the strength of the wind, and the air temperature can alter this experience. Some might even opt for a wetsuit for added comfort.
Daylight
In Ios, Greece, the average length of the day in September is 12h and 25min.On the first day of September in Ios, sunrise is at 06:50 and sunset at 19:47. On the last day of the month, sunrise is at 07:13 and sunset at 19:03 EEST.
Sunshine
In September, the average sunshine in Ios is 10.8h.UV index
In Ios, 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 average person.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Be mindful! Sand and water reflections can up the Sun's UV exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ios, Greece
- Average high temperature in September: 24.5°C
The warmest month (with the highest average high temperature) is August (25.9°C).
The month with the lowest average high temperature is January (14.7°C).
- Average low temperature in September: 23.3°C
The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (12.9°C).
Average pressure in September
Ios, Greece
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is December (1017.7mbar).
The month with the lowest atmospheric pressure is July (1009mbar).
Average wind speed in September
Ios, Greece
- Average wind speed in September: 21.9km/h
The windiest month (with the highest average wind speed) is January (29.2km/h).
The calmest month (with the lowest average wind speed) is May (19.8km/h).
Average humidity in September
Ios, Greece
- Average humidity in September: 73%
The month with the highest relative humidity is August (77%).
The months with the lowest relative humidity are January and December (70%).
Average rainfall in September
Ios, Greece
- Average rainfall in September: 8mm
The wettest month (with the highest rainfall) is February (38mm).
The driest months (with the least rainfall) are July and August (2mm).
Average rainfall days in September
Ios, Greece
- Average rainfall days in September: 4.5 days
The month with the highest number of rainy days is January (14.2 days).
The month with the least rainy days is August (0.4 days).
Average sea temperature in September
Ios, Greece
- Average sea temperature in September: 23°C
The best month for swimming (with the highest average sea temperature) is August (24°C).
The coldest months (with the lowest average sea temperature) are February and March (15°C).
Average daylight in September /
Average sunshine in September
Ios, Greece
- Average daylight in September: 12h and 24min
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: 10h and 48min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in September
Ios, Greece
- Average sunshine days in September: 23.5 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is January (13.3 days).
Average UV index in September
Ios, Greece
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Ios, Greece
- Average cloud cover in September: 9
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 2).
Average visibility in September
Ios, 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).
