Opatija Weather in January
In Opatija, January brings low daytime temperatures around 7°C (45°F), with nights cooling to 1°C (34°F). Expect quite a bit of rainfall this month.
Rainfall in Opatija in January
Past climate data indicates that roughly 14 days will see rain, totalling around 129 mm (5.1 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Opatija in January
January in Opatija sees highs of 7°C (45°F) and lows of 1°C (34°F) overnight. January is part of winter. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. Nights drop to 1°C (34°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. As the coldest month of the year, it's important to pack plenty of warm clothes and winter gear.
Sunshine in Opatija in January
The area enjoys a moderate level of sunlight, with around 112 hours. It's a good balance between sunny and cloudy days.
Average water temperature in January
At 11°C (52°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Opatija. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Croatia, check out our Opatija's climate page.
Opatija Temperature in January
Min Temperature
1°C (34°F)
Max Temperature
7°C (45°F)
Water Temperature
11°C (52°F) *
Chance of Rain
45%
Precipitation
129 mm (5.1 in)
Rainy days
14 days
Humidity
66% *
Sunshine
112 hours *
Percentage Sunshine
40% *
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Opatija typically stay consistent throughout January, with daily highs averaging around 7°C (45°F). Nights are cold, with lows around 2°C (36°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 Opatija in January
Browse day-by-day weather records for Opatija spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Opatija historical weather extremes in January
The extremes listed below come from historical weather data collected in Opatija from 2000 through 2025.
- The warmest day in January was on January 15, 2007, with a maximum of 17°C (63°F).
- The lowest daytime temperature in January was -1°C (30°F), recorded on January 24, 2006.
- The lowest overnight temperature recorded in January was -11°C (12°F) (January 13, 2003).
Best Places in Croatia in January
Find out more about the weather in Croatia and which places have the best travel conditions in this month. See all of Croatia in January →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Opatija 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. Expect water temperatures of around 11°C (52°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Opatija 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 Croatia, check out our Opatija's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Opatija climate overview or explore weather in Croatia.
