Zakinthos
Greece
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Zakinthos, Greece

An aerial panorama of the mountainous Navagio Beach in Zakynthos, Greece, with some cruise boats afloat the clear blue waters
An aerial panorama of the mountainous Navagio Beach in Zakynthos, Greece, with some cruise boats afloat the clear blue waters
September, the first month of the autumn, in Zakinthos, is also a moderately hot month, with average temperature varying between 27.6°C (81.7°F) and 18.8°C (65.8°F).
The ideal sea water temperature of 25.9°C (78.6°F) and only 2.8 rainfall days, with 25.4mm (1") of accumulated rainfall, make September the best time for swimming and other water activities.

Temperature

In September, the average high-temperature in Zakinthos marginally drops, from a hot 30.6°C (87.1°F) in August, to a moderately hot 27.6°C (81.7°F). In Zakinthos, in September, the average low-temperature is 18.8°C (65.8°F).

Heat index

The average heat index is estimated at 29.6°C (85.3°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, metabolic differences, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Zakinthos, the average relative humidity is 66.7%.

Rainfall

In September, in Zakinthos, the rain falls for 2.8 days. Throughout September, 25.4mm (1") of precipitation is accumulated. In Zakinthos, during the entire year, the rain falls for 78.5 days and collects up to 943.3mm (37.1") of precipitation.

Sea temperature

In Zakinthos, Greece, the average water temperature is 25.9°C (78.6°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 September, the average length of the day is 12.4h.

Sunshine

In Zakinthos, the average sunshine is 10h.

UV index

The average daily maximum UV index in Zakinthos is 7. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in September in Zakinthos?

In Zakinthos, Greece, in September, the average high-temperature is 27.6°C (81.7°F), and the average low-temperature is 18.8°C (65.8°F). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), that factores the actual air temperature with the relative humidity, is calculated to 29.6°C (85.3°F).

What is the average humidity in September in Zakinthos?

The average relative humidity in September in Zakinthos is 66.7%.

How many days does it rain in September in Zakinthos?

In September, the rain falls for 2.8 days. Throughout September, 25.4mm (1") of precipitation is accumulated.

What is the water temperature in September in Zakinthos?

In Zakinthos, Greece, in September, the average water temperature is 25.9°C (78.6°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Zakinthos have in September?

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

How many hours of sunshine does Zakinthos have in September?

The average sunshine in September in Zakinthos is 10h.

What is the UV index reading in September in Zakinthos?

In September, the average daily maximum UV index in Zakinthos is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Zakinthos, Greece
  • Average high temperature in September: 27.6°C

The warmest month (with the highest average high temperature) is July (30.7°C).
The month with the lowest average high temperature is January (14.4°C).

  • Average low temperature in September: 18.8°C

The month with the highest average low temperature is August (20.9°C).
The coldest month (with the lowest average low temperature) is January (8.1°C).

Average humidity in September - Zakinthos, Greece
  • Average humidity in September: 66.7%

The month with the highest relative humidity is November (76%).
The month with the lowest relative humidity is July (59.3%).

Average rainfall in September - Zakinthos, Greece
  • Average rainfall in September: 25.4mm

The wettest month (with the highest rainfall) is December (169.9mm).
The driest month (with the lowest rainfall) is July (5mm).

Average rainfall days in September - Zakinthos, Greece
  • Average rainfall days in September: 2.8 days

The month with the highest number of rainy days is December (13.2 days).
The month with the lowest number of rainy days is July (0.5 days).

Average sea temperature in September - Zakinthos, Greece
  • Average sea temperature in September: 25.9°C

The best month for swimming (with the highest average sea temperature) is August (26.3°C).
The coldest month (with the lowest average sea temperature) is February (15.4°C).

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

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 10h

The month with most sunshine is July (Average sunshine: 13h).
The month with least sunshine is December (Average sunshine: 4h).

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

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