September weather forecast and climate
Rethimno, Greece

Dusk in the Venetian Rethimno harbor in Greece
Dusk in the Venetian Rethimno harbor in Greece
The first month of the autumn, September, is also a moderately hot month in Rethimno, Greece, with average temperature ranging between min 19°C (66.2°F) and max 27°C (80.6°F).
The perfect water temperature of 25.4°C (77.7°F) with 19mm (0.75") of accumulated rainfall and only 1 rainfall days, makes September a great period for swimming and other water activities.

Temperature

In September, the average high-temperature in Rethimno, Greece, is almost the same as in August - a still warm 27°C (80.6°F). The average low-temperature, in September, is 19°C (66.2°F).

Rainfall

In Rethimno, during September, the rain falls for 1 days and regularly aggregates up to 19mm (0.75") of precipitation. In Rethimno, Greece, during the entire year, the rain falls for 67 days and collects up to 664mm (26.14") of precipitation.

Sea temperature

In Rethimno, the average seawater temperature in September is 25.4°C (77.7°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Rethimno, the average length of the day is 12.4h.

Sunshine

In Rethimno, the average sunshine is 10h.

UV index

In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Rethimno?

In Rethimno, in September, the average high-temperature is 27°C (80.6°F), and the average low-temperature is 19°C (66.2°F).

How much does it rain in Rethimno in September?

In Rethimno, during September, the rain falls for 1 days and regularly aggregates up to 19mm (0.75") of precipitation.

How warm is the water in September in Rethimno?

In September, the average sea temperature in Rethimno is 25.4°C (77.7°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Rethimno have in September?

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

How long on average sun shines in September in Rethimno?

The average sunshine in September in Rethimno, Greece, is 10h.

What is the UV index reading in September in Rethimno?

In Rethimno, Greece, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Rethimno, Greece
  • Average high temperature in September: 27°C

The warmest month (with the highest average high temperature) is July (30°C).
The month with the lowest average high temperature is January (14°C).

  • Average low temperature in September: 19°C

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

Average rainfall in September - Rethimno, Greece
  • Average rainfall in September: 19mm

The wettest month (with the highest rainfall) is January (142mm).
The driest months (with the least rainfall) are July and August (1mm).

Average rainfall days in September - Rethimno, Greece
  • Average rainfall days in September: 1 days

The month with the highest number of rainy days is December (13 days).
Months with the least rainy days are July and August (0 days).

Average sea temperature in September - Rethimno, Greece
  • Average sea temperature in September: 25.4°C

The best month for swimming (with the highest average sea temperature) is August (25.9°C).
The coldest month (with the lowest average sea temperature) is February (16.1°C).

Average daylight in September / Average sunshine in September - Rethimno, Greece
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 10h

Months with the most sunshine are June, July and August (Average sunshine: 12h).
Months with the least sunshine are January and December (Average sunshine: 4).

Average UV index in September - Rethimno, 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).