Are you considering a trip to Trieste in December? Well, the weather is usually on your side with an average maximum temperature of +10°C and about 9 sunny days. Just keep in mind that there may be some rain, with an average of 12 rainy days and 113 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Average weather
☀️
+10°C
Avg. max. temperature
-8°C
Min.
+19°C
Max.
113 mm
Total precipitation
70%
Avg. humidity
2 m/s
Avg. wind
9 ☀️
Sunny Days
9 ⛅️
Cloudy
12 🌦
Rainy
Our opinion: Trieste has good weather in December.
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Average temperature in Trieste in December
Here are the expected maximum, average and minimum temperatures in Trieste for December based on the historical data.
Last Year
Historical Data
The temperature in December is +12°C on average, with a range between a maximum of +19°C during the day and a minimum of +1°C at night.
The average maximum temperature goes down 28% by the end of the month, compared with the beginning of the month, from +19°C to +14°C.
Is Trieste warm or cold in December?
Trieste is typically cool in December.
Maximum temperatures go down compared to the previous month from +14°C to +10°C. The minimum temperature also goes down from +8°C to +4°C.
Pack a sweater and a jacket as there will be cooler temperatures.
December is one of the coolest months in Trieste, here is the comparison with other months:
Water temperature in Trieste in December
Water in Trieste in December is Cold. It varies from +11°C to +15°C, with an average of +13°C.Note that the air temperature is lower than the water temperature, averaging around +10°C.
In December, water temperatures are average relative to the rest of the year:
The warmest water temperatures in Trieste are reached in August, when the average sea temperature rises to +25°C. The coldest water temperatures are in February, with an average of +9°C.
Can you swim in Trieste in December?
We would not recommend swimming in Trieste in December, the water is very cold (+13°C on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +16°C
🏄♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
You will need a full-body wetsuit, cap, gloves, a warm change of clothes, and a hot drink ready for after your swim.
Climate in Trieste in December
Trieste weather looks like this, on average, in December and the surrounding months.
November
December
January
Avg. temperature
+14°C
+10°C
+9°C
Min. temperature
-4°C
-8°C
-12°C
Max. temperature
+24°C
+19°C
+17°C
Rainfall
163 mm
113 mm
81 mm
Wind
2 m/s
2 m/s
2 m/s
Avg. water temperature
+16°C
+13°C
+10°C
Humidity
71%
70%
69%
Air pressure
1016 HPa
1018 HPa
1018 HPa
Sunny days
7
9
9
Cloudy days
8
9
10
Rainy days
13
12
11
Snowy days
0
0
1
December often has better weather than November.It’s getting colder in December. From +14°C in the day, the average maximum temperature lowers to +10°C.As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 163 mm to 113 mm.It feels drier, as humidity decreases from 71% to 70%.The average wind speed doesn’t change much during December, staying around 2 m/s.The good news is there are likely to be more sunny days in December, from 7 to 9.
January brings much the same weather, it remains good.
Wind speed in Trieste in December based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Trieste is gradually decreasing during December, going from 2 m/s to 1 m/s over the course of the month.
Rain
Amount of rainfall in mm during December in Trieste based on historical data.
Last Year
Historical Data
A chance of rain on a typical day in December stands at 35%, leading to total precipitation of around 126 mm. The maximum amount of rainfall per day is around 43 mm, which is moderate rain.December is a pretty wet month with over 11 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how December is compared with other months in the amount of precipitation, total mm:
Trieste wettest month is November, where a typical day has a 43% chance of precipitation and 163 mm of rainfall per day. July, on the other hand, is the driest month with a mere 26% chance of precipitation and 72 mm of rainfall per day.
How was the weather last December in Trieste?
This is the weather in Trieste in December 2024:
1 December
🌧️
+19°C
2 December
🌧️
+18°C
3 December
☀️
+7°C
4 December
☁️
+7°C
5 December
☁️
+9°C
6 December
☀️
+10°C
7 December
☀️
+11°C
8 December
☁️
+10°C
9 December
🌧️
+10°C
10 December
☀️
+10°C
11 December
☁️
+13°C
12 December
☁️
+13°C
13 December
🌧️
+13°C
14 December
☀️
+13°C
15 December
☀️
+13°C
16 December
☀️
+11°C
17 December
☀️
+13°C
18 December
☀️
+15°C
19 December
☀️
+15°C
20 December
☁️
+12°C
21 December
☁️
+11°C
22 December
☁️
+13°C
23 December
☁️
+16°C
24 December
☁️
+14°C
25 December
☁️
+14°C
26 December
☁️
+12°C
27 December
☁️
+12°C
28 December
☁️
+12°C
29 December
☁️
+12°C
30 December
☁️
+12°C
31 December
🌧️
+14°C
In December 2024 Trieste had 10 sunny days, 16 cloudy days, and 5 rainy days. The average maximum temperature was +12°C, with an absolute maximum of +19°C and a minimum of +7°C. The average humidity was 85%, with a maximum of 97% and a minimum of 57%. The average wind speed was 2 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in December?
Climate Change over Years
This is how Trieste climate have been changing during last 43 years period.
The climate in Trieste in December has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+17°C) and the highest in 2022 (+20°C). The driest year was 2003 with only 712 mm of rainfall, and the wettest year was 2019 with 2509 mm.
FAQ
Frequently asked questions about the weather in Trieste in December:
Is December a good time to visit Trieste?
December is a really good time to go to Trieste. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Trieste.
Can you sunbathe in Trieste in December?
Not really, December is not the best time to sunbathe, unless you visit a local solarium.
Can you swim in Trieste in December?
Swimming in Trieste in December is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.
Is Trieste rainy in December?
Trieste is often rainy in December. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Trieste in December?
Usually, it’s not very sunny in Trieste in December, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Trieste, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
