Portorož Weather in January
Thinking of visiting Portorož in January? Expect low temperatures reaching 9°C (48°F) during the day, dropping to 5°C (41°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Portorož in January
Past climate data indicates that roughly 12 days will see rain, totalling around 84 mm (3.3 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Portorož in January
In January, Portorož sees low temperatures, with highs of 9°C (48°F). Nights drop to around 5°C (41°F). January is known for being in the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. Nights drop to 5°C (41°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. January often features the most temperate temperatures compared to other months.
Sunshine in Portorož in January
The area enjoys a balanced 102 hours of sunlight, ensuring it's neither too overcast nor too sunny.January in Portorož can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Portorož's climate page.
Portorož Temperature in January
Min Temperature
5°C (41°F)
Max Temperature
9°C (48°F)
Chance of Rain
40%
Precipitation
84 mm (3.3 in)
Rainy days
12 days
Humidity
67%
Sunshine
102 hours
Percentage Sunshine
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Portorož typically stay consistent throughout January, with daily highs averaging around 9°C (48°F). Nights are cold, with lows around 1°C (34°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Portorož in January
Browse day-by-day weather records for Portorož spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Portorož historical weather extremes in January
Based on weather observations in Portorož between 2000 and 2025, these are the recorded extremes during January.
- The warmest day in January was on January 19, 2014, with a maximum of 18°C (64°F).
- The coldest January day was on January 24, 2006, with a maximum of 1°C (34°F).
- The lowest overnight temperature recorded in January was -10°C (14°F) (January 26, 2000).
- Peak precipitation in January occurred on January 8, 2001, when 56 mm (2.2 in) of precipitation was measured.
Best Places in Slovenia in January
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in January →
perfect weather
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tolerable
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What to Wear in Portorož in January
We recommend to layer up for chilly conditions in Portorož in January. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Portorož in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Portorož's climate page.
Temperature Rainfall Sunshine Humidity
See the full Portorož climate overview or explore weather in Slovenia.
