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Italy weather

Weather in Trieste for December 2025

Your guide to Trieste weather in December - trends and predictions

    Official Weather Alert ⚠️

  • Yellow Fog Warning - See hour by hour.

    • Snow Forecast ❄️

  • Snowfall in Trieste during December is quite rare, with fewer than 2 snowy days on average.
    According to Trieste snow forecast for December 2025, no snow is expected until the end of the month.

    • Temperatures

  • So far, December 2025 in Trieste is slightly warmer than the historical average by 1.7 °C.

  • The forecast for the next days in Trieste predicts temperatures to be around 10 °C, close to the historical average.

  • In general, the average temperature in Trieste at the beginning of December is 9 °C. As the month progressed, temperatures tended to remain steady, reaching an average of 9 °C by the end of December.

    • Rain 🌧️

  • Trieste experiences moderate rainfall in December, with an average of 9 rainy days and a total precipitation of 58.2 mm.

    • More

  • Is December a good time to visit Trieste? check out the best time to travel to Trieste page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
1
Snow days
Average temperatures
8°/3°
Temperatures
Average wind speed
6 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Trieste Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light drizzle
8°
2
Light rain shower
11°
3
Partly cloudy
9°
4
Overcast
9°
5
Partly cloudy
8°
6
Overcast
9°
7
Sunny
9°
8
Patchy rain possible
8°
9
Cloudy
10°
10
Sunny
9°
11
Sunny
9°
12
Sunny
10°
13
Light rain
9°
14
Partly cloudy
9°
15
Weather Alert Sunny
10°
16
Patchy rain possible
10°
17
Patchy rain possible
11°
18
Partly cloudy
11°
19
Partly cloudy
10°
20
Overcast
11°
21
Patchy rain possible
10°
22
Patchy rain possible
11°
23
Moderate rain
10°
24
Patchy rain possible
11°
25
Patchy rain possible
10°
26
Partly cloudy
9°
27
Partly cloudy
9°
28
Moderate rain
6°
29
Partly cloudy
10°
30
Partly cloudy
10°
31
Light drizzle
9°

Temperatures trend during December in Trieste

See the weather trend as well as the moving average line

December weather in Trieste day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Light drizzle
Light drizzle
 8° /4° 4 mm 3
2 Dec. Light rain shower
Light rain shower
 11° /5° 4.9 mm 3
3 Dec. Partly cloudy
Partly cloudy
 9° /3° 0.1 mm 3
4 Dec. Overcast
Overcast
 9° /3° 0.1 mm 3
5 Dec. Partly cloudy
Partly cloudy
 8° /3° 1.2 mm 3
6 Dec. Overcast
Overcast
 9° /2° 0 mm 3
7 Dec. Sunny
Sunny
 9° /2° 0 mm 3
8 Dec. Patchy rain possible
Patchy rain possible
 8° /2° 16 mm 3
9 Dec. Cloudy
Cloudy
 10° /3° 0.5 mm 3
10 Dec. Sunny
Sunny
 9° /3° 0 mm 3
11 Dec. Sunny
Sunny
 9° /2° 0 mm 3
12 Dec. Sunny
Sunny
 10° /3° 0 mm 3
13 Dec. Light rain
Light rain
 9° /4° 2.2 mm 3
14 Dec. Partly cloudy
Partly cloudy
 9° /4° 1 mm 3
15 Dec. Sunny
Sunny
 10° /5° 0 mm 0.2
16 Dec. Patchy rain possible
Patchy rain possible
 10° /6° 1.4 mm 0.1
17 Dec. Patchy rain possible
Patchy rain possible
 11° /7° 0.3 mm 0.1
18 Dec. Partly cloudy
Partly cloudy
 11° /6° 0 mm 0.1
19 Dec. Partly cloudy
Partly cloudy
 10° /7° 0 mm 0.1
20 Dec. Overcast
Overcast
 11° /9° 0 mm 2
21 Dec. Patchy rain possible
Patchy rain possible
 10° /9° 1.1 mm 2
22 Dec. Patchy rain possible
Patchy rain possible
 11° /9° 0.3 mm 3
23 Dec. Moderate rain
Moderate rain
 10° /9° 7 mm 2
24 Dec. Patchy rain possible
Patchy rain possible
 11° /8° 0.2 mm 2
25 Dec. Patchy rain possible
Patchy rain possible
 10° /8° 0.1 mm 2
26 Dec. Partly cloudy
Partly cloudy
 9° /6° 0 mm 3
27 Dec. Partly cloudy
Partly cloudy
 9° /5° 0 mm 3
28 Dec. Moderate rain
Moderate rain
 6° /3° 9.3 mm 1
29 Dec. Partly cloudy
Partly cloudy
 10° /4° 0 mm 4
30 Dec. Partly cloudy
Partly cloudy
 10° /4° 0 mm 4
31 Dec. Light drizzle
Light drizzle
 9° /4° 3.3 mm 3
Next
Important Notice
Our weather forecast for Trieste in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Trieste forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Trieste weather in December vs November vs January

Compare December weather in Trieste with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
NovemberDecemberJanuary
WeatherSunny
Sunny
Sunny
Sunny
Sunny
Sunny
Temperatures12°/6°8°/3°8°/2°
Rainfall50 mm58 mm85 mm
Snowfall0 cm0 cm1 cm
Wind6.2 km/h5.6 km/h5.8 km/h
Humidity66%68%69%
Rainy days10 days9 days12 days
Snow days0 days1 days1 days
Dry days20 days21 days18 days

Planning a trip to Trieste? Discover the best time to visit

Trieste in December - FAQ

What are the expected maximum and minimum temperatures in Trieste during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 3°.
How much rainfall should be expected in Trieste during December?
Moderate rainfall is anticipated in Trieste during December, with a total of 58.2 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
Will it snow in Trieste in December 2025?
Trieste typically sees 0.22 cm of snowfall during December.
What are the typical wind conditions in Trieste during December?
The average wind speed in Trieste during December is 6 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Trieste in December?

As you prepare for your trip to Trieste in December, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Trieste, during December, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

December rainfall patterns in Trieste

Explore the daily rainfall trends and prepare for Triestes December weather 💧
Typically, Trieste has 9 rainy days in December with a total of 58.2 mm of rainfall.

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Location coordinates Where is Trieste?

Get accurate weather forecasts for Trieste, located at latitude 45.598 and longitude 11.64. Stay updated with localized weather information tailored for Trieste.

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