Galissas
Greece
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Galissas, Greece

The first month of the winter, December, is still a mild month in Galissas, Greece, with average temperature fluctuating between 15°C (59°F) and 10°C (50°F).

Temperature

In Galissas, the average high-temperature in December slightly decreases, from an enjoyable 18°C (64.4°F) in November, to a moderate 15°C (59°F). The average low-temperature, in Galissas, is 10°C (50°F).

Rainfall

The month with the most rainfall in Galissas is December when the rain falls for 11 days and typically aggregates up to 91mm (3.6") of precipitation.

Sea temperature

In December, the average sea temperature in Galissas is 16.7°C (62.1°F).
Note: For swimming, a surface water temperature of 16.7°C (62.1°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

December has the shortest days of the year, with an average of 9.6h of daylight.

Sunshine

January and December, with an average of 4h of sunshine, are months with the least sunshine in Galissas.

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Galissas?

In Galissas, Greece, in December, the average high-temperature is 15°C (59°F), and the average low-temperature is 10°C (50°F).

How much does it rain in Galissas in December?

In Galissas, in December, it is raining for 11 days, with typically 91mm (3.6") of accumulated precipitation.

What is the wettest month in Galissas?

The month with the most rainfall is December when the rain falls for 11 days and typically aggregates up to 91mm (3.6") of precipitation.

How cold is the water in December in Galissas?

In Galissas, Greece, the average seawater temperature in December is 16.7°C (62.1°F). Swimming in 16.7°C (62.1°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the month with the shortest days in Galissas?

December has the shortest days of the year in Galissas, with an average of 9.6h of daylight.

How many hours of daylight does Galissas have in December?

The average length of the day in December in Galissas, Greece, is 9.6h.

What is the month with the least sunshine in Galissas?

Months with the least sunshine in Galissas are January and December, with an average of 4h of sunshine.

How many hours of sunshine does Galissas have in December?

In December, the average sunshine in Galissas, Greece, is 4h.

When is the lowest UV index in Galissas?

Months with the lowest UV index in Galissas, Greece, are January and December, with an average maximum UV index of 2.

How high is the UV index in December in Galissas?

In December, the average daily maximum UV index in Galissas, Greece, is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.
Average temperature in December - Galissas, Greece
  • Average high temperature in December: 15°C

The warmest month (with the highest average high temperature) is July (28°C).
Months with the lowest average high temperature are January and February (13°C).

  • Average low temperature in December: 10°C

The month with the highest average low temperature is July (22°C).
Coldest months (with the lowest average low temperature) are January and February (8°C).

Average rainfall in December - Galissas, Greece
  • Average rainfall in December: 91mm

The wettest month (with the highest rainfall) is December (91mm).
Driest months (with the lowest rainfall) are July and August (2mm).

Average rainfall days in December - Galissas, Greece
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is December (11 days).
Months with the lowest number of rainy days are June, July, August and September (1 days).

Average sea temperature in December - Galissas, Greece
  • Average sea temperature in December: 16.7°C

The best month for swimming (with the highest average sea temperature) is August (25.8°C).
The coldest month (with the lowest average sea temperature) is February (15.6°C).

Average daylight in December / Average sunshine in December - Galissas, Greece
  • Average daylight in December: 9.6h

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 December: 4h

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 December - Galissas, Greece
  • Average UV index in December: 2

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).