Naantali Weather in January
January in Naantali brings very low temperatures, with daytime highs of 0°C (32°F) and nights around -5°C (23°F). Expect around 56 mm (2.2 in) of snow/rainfall during the month.
Rainfall in Naantali in January
Looking at the last 30 years, the data shows about 20 days with snow/rain, averaging 56 mm (2.2 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Naantali in January
In January, Naantali sees very low temperatures, with highs of 0°C (32°F). Nights drop to around -5°C (23°F). This month falls in the winter season. Expect a distinctly cold feel throughout the day, not just overnight. Nights are well below freezing at -5°C (23°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. It is a very cold month, so be prepared and make sure to dress up warm. It's always better to be prepared than to find oneself shivering in the cold.
Sunshine in Naantali in January
The city usually sees around 42 hours of sunlight, indicating fewer sunny days.If you're looking for dry conditions and comfortable temperatures, January may not be the ideal month to visit Naantali. 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 Finland, check out our Naantali's climate page.
Naantali Temperature in January
Min Temperature
-5°C (23°F)
Max Temperature
0°C (32°F)
Chance of Rain
67%
Precipitation
56 mm (2.2 in)
Rainy days
20 days
Sunshine
42 hours *
Percentage Sunshine
*
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Naantali typically stay consistent throughout January, with daily highs averaging around 0°C (32°F). Nights are very cold, with lows typically ranging from -9°C (16°F) to -5°C (23°F).
Average temperatures in January
Historical weather for Naantali in January
Browse day-by-day weather records for Naantali spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Naantali historical weather extremes in January
Based on 49 years of weather observations in Naantali between 1976 and 2025, these are the recorded extremes.
- Naantali recorded its highest January temperature of 8°C (46°F) on January 21, 2020.
Best Places in Finland in January
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in January →
perfect weather
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tolerable
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What to Wear in Naantali in January
We recommend to layer up for chilly conditions in Naantali 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. Rain is likely on several days, so bring a good rain jacket. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Naantali 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 Finland, check out our Naantali's climate page.
See the full Naantali climate overview or explore weather in Finland.
