December weather forecastTrieste, Italy
December
Weather in December
In December, Trieste finally succumbs to the throes of winter with a low around 2.9°C (37.2°F) and highs averaging 7.6°C (45.7°F). As the year wraps up, weather conditions turn harsher, showcasing winter in all its might. The days grow shorter and the nights longer, with less sunshine received throughout the day. December also marks a return of snowfall, albeit in a minimal range, adding to the festive European winter vibes. The colder conditions call for winter wear and some hot beverage amidst the charming coastal city's winter setting.Temperature
The onset of December in Trieste brings a small shift in high-temperatures, falling from a fresh 11.9°C (53.4°F) in November to a frosty 7.6°C (45.7°F). An average nighttime temperature of 2.9°C (37.2°F) marks December.Humidity
The average relative humidity in December in Trieste, Italy, is 79%.Rainfall
In Trieste, in December, during 12.2 rainfall days, 81mm (3.19") of precipitation is typically accumulated. Throughout the year, in Trieste, there are 177.7 rainfall days, and 1019mm (40.12") of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows in Trieste. Throughout December, in the average 0.7 snowfall days, it receives 9mm (0.35") of snow. In Trieste, during the entire year, snow falls for 3.5 days and aggregates up to 39mm (1.54") of snow.Sea temperature
In Trieste, Italy, in December, the average water temperature is 13.2°C (55.8°F).Note: Swimming in 13.2°C (55.8°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 07:25 and sunset at 16:22. On the last day of the month, sunrise is at 07:45 and sunset at 16:30 CET.
Sunshine
The average sunshine in December in Trieste is 5.3h.UV index
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Trieste, Italy. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 2 during December leads to these instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Trieste, Italy
- Average high temperature in December: 7.6°C
The warmest month (with the highest average high temperature) is August (27.2°C).
The month with the lowest average high temperature is January (5.9°C).
- Average low temperature in December: 2.9°C
The month with the highest average low temperature is August (18.1°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in December
Trieste, Italy
- Average pressure in December: 1019.8mbar
The month with the highest atmospheric pressure is December (1019.8mbar).
The months with the lowest atmospheric pressure are May, June and July (1014.7mbar).
Average wind speed in December
Trieste, Italy
- Average wind speed in December: 9.1km/h
The windiest month (with the highest average wind speed) is February (11.7km/h).
The calmest months (with the lowest average wind speed) are June, July and August (8.6km/h).
Average humidity in December
Trieste, Italy
- Average humidity in December: 79%
The month with the highest relative humidity is November (82%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Trieste, Italy
- Average rainfall in December: 81mm
The wettest month (with the highest rainfall) is November (129mm).
The driest month (with the least rainfall) is January (54mm).
Average rainfall days in December
Trieste, Italy
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is January (10.9 days).
Average snowfall in December
Trieste, Italy
- Average snowfall in December: 9mm
The month with the highest snowfall is February (14mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Trieste, Italy
- Average snowfall days in December: 0.7 days
The month with the highest number of snowfall days is January (1.2 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
Trieste, Italy
- Average sea temperature in December: 13.2°C
The best months for swimming (with the highest average sea temperature) are July and August (24.8°C).
The coldest month (with the lowest average sea temperature) is February (9.3°C).
Average daylight in December /
Average sunshine in December
Trieste, Italy
- Average daylight in December: 8h and 48min
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 18min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The months with the least sunshine are February and November (Average sunshine: 5h and 0min).
Average sunshine days in December
Trieste, Italy
- Average sunshine days in December: 16.4 days
The month with the most sunshine days is January (17 days).
The month with the least sunshine days is May (6.6 days).
Average UV index in December
Trieste, Italy
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in December
Trieste, Italy
- Average cloud cover in December: 43
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in December
Trieste, Italy
- Average visibility in December: 9km
The months with the highest visibility are April, May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, October, November and December (9km).
