September weather forecast
Oia, Greece

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Weather in September

The first month of the autumn, September, is still a warm month in Oia, Greece, with an average temperature ranging between min 23.3°C (73.9°F) and max 24.5°C (76.1°F).

Temperature

Oia records a slight change with September's average high-temperatures adjusting to a still warm 24.5°C (76.1°F) from August's 25.9°C (78.6°F). Nights in September in Oia, Greece, exhibit a minor reduction to an average low temperature of 23.3°C (73.9°F).

Humidity

The average relative humidity in September is 73%.

Rainfall

In Oia, in September, it is raining for 4.5 days, with typically 8mm (0.31") of accumulated precipitation. In Oia, during the entire year, the rain falls for 87.8 days and collects up to 221mm (8.7") of precipitation.

Sea temperature

In Oia, the average seawater temperature in September is 23°C (73.4°F).
Note: For someone not comfortable with cold, swimming in 23°C (73.4°F) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.

Daylight

In Oia, the average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 06:50 and sunset at 19:46. On the last day of the month, sunrise is at 07:13 and sunset at 19:03 EEST.

Sunshine

In Oia, the average sunshine in September is 10.8h.

UV index

The average daily maximum UV index in September in Oia is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: During September, 6 as the daily maximum UV index converts into the following advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Caution! Sand and water surfaces escalate the UV intensity from the Sun.

Frequently asked questions

What are September temperatures in Oia?

The high-temperature during September is 24.5°C (76.1°F) and the low-temperature is 23.3°C (73.9°F).

What is the average humidity in September in Oia?

The average relative humidity in September in Oia is 73%.

How much does it rain in Oia in September?

In Oia, in September, it is raining for 4.5 days, with typically 8mm (0.31") of accumulated precipitation.

What is the water temperature in September in Oia?

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 Oia?

The average day length in September is 12h and 25min.

When is the sunrise / sunset in September in Oia?

In September, on the first day of the month, sunrise is at 06:50 and sunset at 19:46. On the last day of the month, in Oia, Greece, sunrise is at 07:13 and sunset at 19:03 EEST.

How long on average sun shines in September in Oia?

In Oia, the average sunshine duration in September is 10.8h.

What is the UV index reading in September in Oia?

In Oia, Greece, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to Sun's UV rays.

Average temperature in September
Oia, Greece

Average temperature in September - Oia, 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
Oia, Greece

Average pressure in September - Oia, 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
Oia, Greece

Average wind speed in September - Oia, 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
Oia, Greece

Average humidity in September - Oia, 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
Oia, Greece

Average rainfall in September - Oia, 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
Oia, Greece

Average rainfall days in September - Oia, 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
Oia, Greece

Average sea temperature in September - Oia, 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
Oia, Greece

Average daylight in September / Average sunshine in September - Oia, 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: 10h and 5min

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
Oia, Greece

Average sunshine days in September - Oia, 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
Oia, Greece

Average UV index in September - Oia, 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
Oia, Greece

Average cloud cover in September - Oia, 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
Oia, Greece

Average visibility in September - Oia, 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).

Oia, Greece

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