Koper Weather in January
January in Koper averages 9°C (48°F) during the day and 3°C (37°F) at night. Quite a bit of rainfall is typical this month, with around 85 mm (3.3 in) on average. An umbrella is a good idea.
Rainfall in Koper in January
Historically, approximately 12 days this month are expected to have rain, averaging 85 mm (3.3 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Koper in January
Koper in January gets highs of 9°C (48°F) during the day and drops to 3°C (37°F) at night. This month falls in the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. Nights fall to 3°C (37°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep. The coldest month of the year calls for plenty of warm layers. Be sure to pack your winter gear.
Sunshine in Koper in January
The area enjoys a balanced 102 hours of sunlight, ensuring it's neither too overcast nor too sunny.January in Koper has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations 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 Koper's climate page.
Koper Temperature in January
Min Temperature
3°C (37°F)
Max Temperature
9°C (48°F)
Chance of Rain
41%
Precipitation
85 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 Koper 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 Koper in January
Browse day-by-day weather records for Koper spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koper historical weather extremes in January
The extremes listed below come from historical weather data collected in Koper from 2000 through 2025.
- The warmest day in January was on January 19, 2014, with a maximum of 17°C (63°F).
- The lowest daytime temperature in January was 0°C (32°F), recorded on January 24, 2006.
- The coldest night in January in Koper was on January 26, 2000, with a minimum of -10°C (14°F).
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
unpleasant
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What to Wear in Koper in January
Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Koper 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 Koper's climate page.
Temperature Rainfall Sunshine Humidity
See the full Koper climate overview or explore weather in Slovenia.
