Ios
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Ios, Greece

September, the first month of the autumn, in Ios, is also a moderately hot month, with average temperature ranging between max 24°C (75.2°F) and min 19°C (66.2°F).

Temperature

In Ios, the average high-temperature in September is relatively the same as in August - a still warm 24°C (75.2°F). In September, the average low-temperature is 19°C (66.2°F).

Rainfall

In Ios, during 2 rainfall days, 12mm (0.47") of precipitation is typically accumulated. In Ios, during the entire year, the rain falls for 70 days and collects up to 503mm (19.8") of precipitation.

Sea temperature

In Ios, Greece, the average seawater temperature is 23°C (73.4°F).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23°C (73.4°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)

Daylight

In Ios, the average length of the day in September is 12.4h.

Sunshine

In Ios, the average sunshine in September is 11h.

UV index

The average daily maximum UV index in Ios is 7. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Ios?

In September, in Ios, Greece, the average high-temperature is 24°C (75.2°F), and the average low-temperature is 19°C (66.2°F).

How much does it rain in Ios in September?

In Ios, in September, it is raining for 2 days, with typically 12mm (0.47") of accumulated precipitation.

What is the sea temperature in September in Ios?

In September, the average sea temperature is 23°C (73.4°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23°C (73.4°F) water may be enjoyable.

What is the average length of the day in September in Ios?

In September, the average length of the day in Ios, Greece, is 12.4h.

How long on average sun shines in September in Ios?

The average sunshine in September in Ios, Greece, is 11h.

What is the UV index reading in September in Ios?

In September, the average daily maximum UV index in Ios, Greece, is 7. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Ios, Greece
  • Average high temperature in September: 24°C

The warmest month (with the highest average high temperature) is July (27°C).
Months with the lowest average high temperature are January and February (13°C).

  • Average low temperature in September: 19°C

Months with the highest average low temperature are July and August (21°C).
Coldest months (with the lowest average low temperature) are January and February (8°C).

Average rainfall in September - Ios, Greece
  • Average rainfall in September: 12mm

The wettest month (with the highest rainfall) is January (99mm).
Driest months (with the lowest rainfall) are July and August (2mm).

Average rainfall days in September - Ios, Greece
  • Average rainfall days in September: 2 days

The month with the highest number of rainy days is December (12 days).
The month with the lowest number of rainy days is August (0 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).
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: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 11h

The month with most sunshine is July (Average sunshine: 14h).
Months with least sunshine are January and December (Average sunshine: 4).

Average UV index in September - Ios, Greece
  • Average UV index in September: 7

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).