Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
The move into December indicates a slight reduction in the average high-temperature, down from November's enjoyable 19.2°C (66.6°F) to a moderate 15.8°C (60.4°F). Katastárion's nighttime temperature in December consistently rests at a still mild 13.8°C (56.8°F).Humidity
The months with the lowest humidity are September and December, with an average relative humidity of 67%.Rainfall
In Katastárion, in December, during 6.8 rainfall days, 15mm (0.59") of precipitation is typically accumulated. Throughout the year, there are 51.3 rainfall days, and 100mm (3.94") of precipitation is accumulated.Sea temperature
In December, the average sea temperature in Katastárion is 17.8°C (64°F).Note: Swimming in 17.8°C (64°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).
Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 07:34 and sunset at 17:18. On the last day of December, sunrise is at 07:52 and sunset at 17:28 EET.
Sunshine
In December, the average sunshine is 6h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 4 suggests this advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. 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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Katastárion?
What are the least humid months in Katastárion?
What is the average humidity in December in Katastárion?
How much does it rain in Katastárion in December?
What is the sea water temperature in December in Katastárion?
What is the month with the shortest days in Katastárion?
How many hours of daylight does Katastárion have in December?
When are sunrise and sunset in December in Katastárion?
How long on average sun shines in December in Katastárion?
When is the lowest UV index in Katastárion?
What is the UV index reading in December in Katastárion?
Average temperature in December
Katastárion, Greece
- Average high temperature in December: 15.8°C
The warmest month (with the highest average high temperature) is August (28.2°C).
The month with the lowest average high temperature is January (14.2°C).
- Average low temperature in December: 13.8°C
The month with the highest average low temperature is August (26.3°C).
The coldest month (with the lowest average low temperature) is January (12.2°C).
Average pressure in December
Katastárion, Greece
- Average pressure in December: 1018.2mbar
The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is July (1011.9mbar).
Average wind speed in December
Katastárion, Greece
- Average wind speed in December: 19.1km/h
The windiest month (with the highest average wind speed) is January (21km/h).
The calmest month (with the lowest average wind speed) is June (14km/h).
Average humidity in December
Katastárion, Greece
- Average humidity in December: 67%
The month with the highest relative humidity is April (73%).
The months with the lowest relative humidity are September and December (67%).
Average rainfall in December
Katastárion, Greece
- Average rainfall in December: 15mm
The wettest month (with the highest rainfall) is November (26mm).
The driest month (with the least rainfall) is August (0mm).
Average rainfall days in December
Katastárion, Greece
- Average rainfall days in December: 6.8 days
The months with the highest number of rainy days are October and November (6.9 days).
The month with the least rainy days is August (0.3 days).
Average sea temperature in December
Katastárion, Greece
- Average sea temperature in December: 17.8°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 December /
Average sunshine in December
Katastárion, Greece
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in December
Katastárion, Greece
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is November (19.5 days).
Average UV index in December
Katastárion, 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
Katastárion, Greece
- Average cloud cover in December: 36
The month with the most cloud cover is January (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Katastárion, 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).
