December weather forecastKos, Greece

Clear waters of the Kos Town Harbour, Greece

December

Weather in December

December in Kos marks the arrival of winter, adorning the island in a contrasting yet mesmerizing attire. Drawing attention to the shift in seasons, rainfall spikes to 78mm (3.07") in December. The weather pattern is noticeably colder compared to November, accentuating the winter feel. The sea temperature drops, reflecting the mild winter chill in the air. Amidst shortened daylight and cooler breezes, December continues to hold its charm, offering a different perspective of beauty in Kos.

Temperature

As November transitions into December, Kos sees a gentle drop in the average high-temperature, transitioning from an enjoyable 19.2°C (66.6°F) to a mild 15.5°C (59.9°F). Kos, in the month of December, notes an average low temperature of 13.2°C (55.8°F), indicating a small decrease from the daytime highs.

Humidity

In December, the average relative humidity is 67%.

Rainfall

In December, the rain falls for 13.4 days. Throughout December, 78mm (3.07") of precipitation is accumulated. In Kos, during the entire year, the rain falls for 87.4 days and collects up to 351mm (13.82") of precipitation.

Sea temperature

In Kos, Greece, in December, the average water temperature is 18.6°C (65.5°F).
Note: A majority do not enjoy swimming in water at 18.6°C (65.5°F). The difficulty in controlling breathing increases progressively as the temperature dips below 21°C (69.8°F).

Daylight

December has the shortest days of the year in Kos, with an average of 9h and 42min of daylight.
On the first day of the month, sunrise is at 07:05 and sunset at 16:54. On the last day of December, in Kos, sunrise is at 07:23 and sunset at 17:04 EET.

Sunshine

The month with the least sunshine in Kos is December, with an average of 6.6h of sunshine.

UV index

January, February and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 4 during December leads to these advisories:
Be vigilant - Preventing sunburn is recommended. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.

Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in December, in Kos, is 15.5°C (59.9°F), while the low-temperature averages to 13.2°C (55.8°F). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is computed to be 31°C (87.8°F).

In Kos, Greece, the average relative humidity in December is 67%.

In Kos, Greece, in December, during 13.4 rainfall days, 78mm (3.07") of precipitation is typically accumulated.

In Kos, Greece, the average seawater temperature in December is 18.6°C (65.5°F). For swimming, a surface water temperature of 18.6°C (65.5°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).

The month with the shortest days in Kos is December, with an average of 9h and 42min of daylight.

The average day length in December in Kos is 9h and 41min.

In December, on the first day of the month, sunrise is at 07:05 and sunset at 16:54. On the last day of the month, in Kos, Greece, sunrise is at 07:23 and sunset at 17:04 EET.

December has the least sunshine of the year, with an average of 6.6h of sunshine.

In Kos, Greece, the average sunshine duration in December is 6.6h.

The months with the lowest UV index are January, February and December, with an average maximum UV index of 4.

In December, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

19.2°C

15.5°C

13.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

19.8km/h

23.6km/h

25.1km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

8.6

13.4

13.5

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

20.2

16.7

15.5

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Kos, Greece

Average high temperature in December: 15.5°C

The warmest month (with the highest average high temperature) is August (28.5°C).
The month with the lowest average high temperature is January (13.8°C).

Average low temperature in December: 13.2°C

The month with the highest average low temperature is August (25°C).
The coldest month (with the lowest average low temperature) is January (11.1°C).

Average pressure in December
Kos, Greece

Average pressure in December: 1017.6mbar

The month with the highest atmospheric pressure is December (1017.6mbar).
The month with the lowest atmospheric pressure is July (1007.6mbar).

Average wind speed in December
Kos, Greece

Average wind speed in December: 22.1km/h

The windiest month (with the highest average wind speed) is January (23.7km/h).
The calmest month (with the lowest average wind speed) is May (14.4km/h).

Average humidity in December
Kos, Greece

Average humidity in December: 67%

The months with the highest relative humidity are February, April and May (70%).
The months with the lowest relative humidity are July and October (65%).

Average rainfall in December
Kos, Greece

Average rainfall in December: 78mm

The wettest month (with the highest rainfall) is January (81mm).
The driest months (with the least rainfall) are July and August (1mm).

Average rainfall days in December
Kos, Greece

Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is January (13.5 days).
The month with the least rainy days is August (0.4 days).

Average sea temperature in December
Kos, Greece

Average sea temperature in December: 18.6°C

The best month for swimming (with the highest average sea temperature) is August (25.3°C).
The coldest month (with the lowest average sea temperature) is March (16.9°C).

Average daylight in December /
Average sunshine in December
Kos, Greece

Average daylight in December: 9h and 42min

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 December: 6h and 36min

The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in December
Kos, Greece

Average sunshine days in December: 16.7 days

The months with the most sunshine days are July and August (29.8 days).
The month with the least sunshine days is February (14.1 days).

Average UV index in December
Kos, Greece

Average UV index in December: 4

The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).

Average cloud cover in December
Kos, Greece

Average cloud cover in December: 31

The month with the most cloud cover is January (Cloud cover 37).
The months with the least cloud cover are July and August (Cloud cover 3).

Average visibility in December
Kos, Greece

Average visibility in December: 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).