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Trieste in January: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Trieste in January will be like? Take a look at our weather guide for Trieste, based on historical data.
Check flight prices to Trieste on Avionero:
January

Weather in Trieste in January 2025

Good Weather
Chill
🌧️
Rainy
🌊
Cold water
Planning a trip to Trieste in January? You are in luck! The weather is generally good, with an average maximum temperature of +48°F and approximately 9 sunny days. Just be prepared for some rain, as there are usually around 11 rainy days and 81 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flights in one click on Avionero.
Good to know:
  • January is usually the coldest month of the year in Trieste;

Average weather

☀️
+48°F
Avg. max. temperature
+10°F
Min.
+63°F
Max.
81 mm
Total precipitation
69%
Avg. humidity
2 m/s
Avg. wind
9 ☀️
Sunny Days
10 ⛅️
Cloudy
11 🌦
Rainy
Our opinion: Trieste has good weather in January.

Average temperature in Trieste in January

Here are the expected maximum, average and minimum temperatures in Trieste for January based on the historical data.
Last Year
Historical Data

Going from a maximum of +57°F during the day to a minimum of +30°F during the night, the temperature in January averages around +50°F.

The average maximum temperature goes down 13% by the end of the month, compared with the beginning of the month, from +55°F to +52°F.

Is Trieste warm or cold in January?

Trieste is typically chill in January.

Maximum temperatures go down compared to the previous month from +50°F to +48°F. The minimum temperature also goes down from +39°F to +37°F.

Pack a jumper and a jacket as there will be cooler temperatures.

January is the coldest month in Trieste, here is the comparison with other months:

Water temperature in Trieste in January

Water in Trieste in January is Cold. It varies from +46°F to +55°F, with an average of +51°F. Note that the air temperature is lower than the water temperature, averaging around +48°F.

The water temperature in January is one of the coldest of the entire year:

The warmest water temperatures in Trieste are reached in August, when the average sea temperature rises to +77°F. The coldest water temperatures are in February, with an average of +49°F.

Can you swim in Trieste in January?

We would not recommend swimming in Trieste in January, the water is very cold (+51°F on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +61°F
🏄‍♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°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 January

Trieste weather looks like this, on average, in January and the surrounding months.
DecemberJanuaryFebruary
Avg. temperature
+50°F+48°F+50°F
Min. temperature
+18°F+10°F+10°F
Max. temperature
+66°F+63°F+70°F
Rainfall
113 mm81 mm78 mm
Wind
2 m/s2 m/s2 m/s
Avg. water temperature
+56°F+51°F+49°F
Humidity
70%69%67%
Air pressure
1018 HPa1018 HPa1017 HPa
Sunny days
999
Cloudy days
9108
Rainy days
121110
Snowy days
011

January weather is still as good as in December. It’s getting colder in January. From +50°F in the day, the average maximum temperature lowers to +48°F. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 113 mm to 81 mm. It feels drier, as humidity decreases from 70% to 69%. The average wind speed doesn’t change much during January, staying around 2 m/s. The amount of sunny days stay about the same, averaging 9 sunny days during the month.

February brings much the same weather, it remains good.

Wind

Wind speed in Trieste in January based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 9 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 increasing during January, going from 0 m/s to 1 m/s over the course of the month.

Rain

Amount of rainfall in mm during January in Trieste based on historical data.
Last Year
Historical Data
Typically, there is a 35% chance of rain on an average day in January, with total rainfall of approximately 136 mm. The maximum amount of rainfall per day is around 47 mm, which is moderate rain. January is a pretty wet month with over 11 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how January 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.

Snow

Amount of snow in mm during January in Trieste based on historical data.
Last Year
Historical Data
Typically, there is a 0% chance of snow on an average day in January, with a total monthly snowfall of approximately 0 mm.

January is one of the snowiest months in Trieste.

Here’s how January is compared with other months in the amount of snow, total mm:

How was the weather last January in Trieste?

This is the weather in Trieste in January 2023:
1 January
☁️
+55°F
2 January
☁️
+52°F
3 January
🌫️
+53°F
4 January
☁️
+56°F
5 January
☁️
+51°F
6 January
☁️
+54°F
7 January
☁️
+51°F
8 January
☁️
+54°F
9 January
🌧️
+56°F
10 January
☀️
+54°F
11 January
☁️
+53°F
12 January
☁️
+55°F
13 January
☁️
+52°F
14 January
☁️
+57°F
15 January
🌧️
+52°F
16 January
🌧️
+51°F
17 January
🌧️
+47°F
18 January
🌧️
+47°F
19 January
🌧️
+43°F
20 January
☁️
+44°F
21 January
☁️
+44°F
22 January
☁️
+44°F
23 January
☁️
+48°F
24 January
☁️
+51°F
25 January
☀️
+49°F
26 January
☀️
+43°F
27 January
☀️
+43°F
28 January
☁️
+44°F
29 January
☀️
+47°F
30 January
☀️
+47°F
31 January
☀️
+52°F
In January 2023 Trieste had 7 sunny days, 17 cloudy days, and 6 rainy days. The average maximum temperature was +50°F, with an absolute maximum of +57°F and a minimum of +43°F. The average humidity was 74%, with a maximum of 100% and a minimum of 37%. The average wind speed was 3 m/s, with a maximum of 11 m/s and a minimum of 0 m/s.
Are you planning a trip in January?

Climate Change Over the Years

This is how Trieste climate has changed over the last 43 years.

The climate in Trieste in January has not changed that much over the last 43 years.

The average temperature was the lowest in 1980 (+63°F) and the highest in 2022 (+69°F). 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 January:

Is January a good time to visit Trieste?

January 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 January?

Not really, January is not the best time to sunbathe, unless you visit a local solarium.

Can you swim in Trieste in January?

Swimming in Trieste in January is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.

Is Trieste rainy in January?

Trieste is often rainy in January. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Trieste in January?

Usually, it’s not very sunny in Trieste in January, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in Italy

Check out the weather for other cities in Italy.

Monthly weather in Trieste

Source of the data

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.