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 snowfall in December
- Average snowfall 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
Weather in December
Temperature
With the arrival of December, Opatija notices a mild change in the average high-temperature, sliding from November's moderate 13.7°C (56.7°F) to a fresh 10°C (50°F). Opatija observes an average low-temperature of 7.2°C (45°F) during the slightly cooler nights of December.Humidity
In Opatija, the average relative humidity in December is 73%.Rainfall
In Opatija, in December, it is raining for 12.2 days, with typically 59mm (2.32") of accumulated precipitation. Throughout the year, there are 157.3 rainfall days, and 720mm (28.35") of precipitation is accumulated.Snowfall
Months with snowfall in Opatija are February, March and December. The months with the most snowfall in Opatija are February, March and December, with an average 1mm (0.04") of accumulated snow.Sea temperature
In December, the average sea temperature is 14.3°C (57.7°F).Note: Swimming in 14.3°C (57.7°F) poses a severe threat. Even short exposure to 13°C (55.4°F) is chilling, and going below 10°C (50°F) can cause breathing irregularities and intense cold shock, based on one's stamina.
Daylight
December has the shortest days of the year in Opatija, with an average of 8h and 48min of daylight.On the first day of December, sunrise is at 07:22 and sunset at 16:21. On the last day of the month, sunrise is at 07:42 and sunset at 16:29 CET.
Sunshine
The months with the least sunshine in Opatija are January and December, with an average of 5.3h of sunshine.UV index
The average daily maximum UV index in December in Opatija, Croatia, is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 3 during December leads to these advisories:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
What is the usual temperature for Opatija in December?
What is the average humidity in December in Opatija?
How much does it rain in Opatija in December?
What is the snowiest month in Opatija?
When does it start to snow in Opatija?
What is the sea water temperature in December in Opatija?
What is the month with the shortest days in Opatija?
What is the average length of the day in December in Opatija?
When is the sunrise / sunset in December in Opatija?
What is the month with the least sunshine in Opatija?
How many hours of sunshine does Opatija have in December?
How high is the UV index in December in Opatija?
Average temperature in December
Opatija, Croatia
- Average high temperature in December: 10°C
The warmest month (with the highest average high temperature) is August (26.9°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in December: 7.2°C
The month with the highest average low temperature is August (22.4°C).
The coldest month (with the lowest average low temperature) is January (5.6°C).
Average pressure in December
Opatija, Croatia
- Average pressure in December: 1019.5mbar
The month with the highest atmospheric pressure is December (1019.5mbar).
The month with the lowest atmospheric pressure is July (1014.3mbar).
Average wind speed in December
Opatija, Croatia
- Average wind speed in December: 13.3km/h
The windiest month (with the highest average wind speed) is February (16.7km/h).
The calmest month (with the lowest average wind speed) is July (10.9km/h).
Average humidity in December
Opatija, Croatia
- Average humidity in December: 73%
The month with the highest relative humidity is November (76%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Opatija, Croatia
- Average rainfall in December: 59mm
The wettest month (with the highest rainfall) is November (89mm).
The driest month (with the least rainfall) is January (35mm).
Average rainfall days in December
Opatija, Croatia
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is August (11.1 days).
Average snowfall in December
Opatija, Croatia
- Average snowfall in December: 1mm
The months with the highest snowfall are February, March and December (1mm).
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Opatija, Croatia
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Opatija, Croatia
- Average sea temperature in December: 14.3°C
The best month for swimming (with the highest average sea temperature) is August (24.9°C).
The coldest month (with the lowest average sea temperature) is February (10.7°C).
Average daylight in December /
Average sunshine in December
Opatija, Croatia
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 5h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 18min).
Average sunshine days in December
Opatija, Croatia
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is March (17.5 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in December
Opatija, Croatia
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Opatija, Croatia
- Average cloud cover in December: 43
The months with the most cloud cover are January and February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Opatija, Croatia
- 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).
Opatija, Croatia
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