Naantali in Winter
In winter (December, January and February), Naantali sees average daytime highs around -1°C and overnight lows near -5°C, with 141 mm of precipitation over about 31 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Over the season highs ease from about 2°C in early December to -1°C by late February. The sky is clear or mostly clear about 13% of the time across winter, and the air most often feels dry.
Winter is Naantali's weakest season of the year to visit on our travel score. For the whole year in context, see Naantali's year-round climate.
- Avg daytime high
- -1°C
- coldest season of the year
- Avg overnight low
- -5°C
- Precipitation
- 141 mm
- 31 wet days
- Avg wind
- 16 km/h
- Travel score
- 0.0
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Naantali in Winter
Over the season highs ease from about 2°C in early December to -1°C by late February.
A typical winter day in Naantali reaches about -1°C and drops to -5°C overnight. The warmest of the three months is December, the coolest February.
How winter really feels in Naantali
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 90 that feel at or below 0°C.
The story in winter is cold — wind chill drags the overnight "feels like" below the raw low.
Naantali weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -1° / -5° | 48 | 10.2 | 8.3 | 6.3 | 0.0 |
| Feb | -2° / -7° | 36 | 8.4 | 7.2 | 8.6 | 0.0 |
| Mar | 2° / -4° | 34 | 8.2 | 5.4 | 11.3 | 0.0 |
| Apr | 8° / 0° | 32 | 7.7 | 1.8 | 14.2 | 1.2 |
| May | 13° / 5° | 39 | 8.6 | 0.1 | 16.9 | 4.0 |
| Jun | 18° / 10° | 62 | 10.5 | 0 | 18.5 | 5.6 |
| Jul | 21° / 13° | 76 | 11.8 | 0 | 17.8 | 6.2 |
| Aug | 20° / 12° | 75 | 12.2 | 0 | 15.4 | 5.9 |
| Sep | 15° / 9° | 58 | 9.7 | 0 | 12.6 | 4.4 |
| Oct | 9° / 4° | 62 | 11 | 0.6 | 9.7 | 1.7 |
| Nov | 4° / 1° | 58 | 11.3 | 3.2 | 7.1 | 0.1 |
| Dec | 1° / -3° | 57 | 12.3 | 6.8 | 5.5 | 0.0 |
Cloud cover in Winter
The sky is clear or mostly clear about 13% of the time across winter.
Chance of precipitation in Winter
Naantali gets around 141 mm of rain and snow over 31 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 16 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 6 hours in early December to 9 h 48 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 0.5 kWh/m².
Is winter a good time to visit Naantali?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Naantali.
What to pack for Naantali in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Naantali sees daytime highs around -1°C and nights near -5°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 31 days see rain.
Sea temperature near Naantali in Winter
The nearest coast averages about 2°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 24 km away) is warmest in August at about 17°C and coldest in March near 1°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 2 | 1 | 1 | 2 | 6 | 11 | 16 | 17 | 14 | 10 | 7 | 4 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 2 | Bracing |
| Feb | 1 | Bracing |
| Mar | 1 | Bracing |
| Apr | 2 | Bracing |
| May | 6 | Bracing |
| Jun | 11 | Bracing |
| Jul | 16 | Cool |
| Aug | 17 | Cool |
| Sep | 14 | Bracing |
| Oct | 10 | Bracing |
| Nov | 7 | Bracing |
| Dec | 4 | Bracing |
UV index in Naantali in Winter
Clear-sky midday UV across winter averages around 0. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Naantali peaks around June 16 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 1 | 2 | 3 | 4 | 5 | 4 | 4 | 2 | 1 | 0 | 0 |
| Level | Low | Low | Low | Moderate | Moderate | High | Moderate | Moderate | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 1 | Low |
| Mar | 2 | Low |
| Apr | 3 | Moderate |
| May | 4 | Moderate |
| Jun | 5 | High |
| Jul | 4 | Moderate |
| Aug | 4 | Moderate |
| Sep | 2 | Moderate |
| Oct | 1 | Low |
| Nov | 0 | Low |
| Dec | 0 | Low |
Where is Naantali?
Naantali sits at 60.5°N, 22.0°E, 9 m above sea level, in Finland. The nearest listed city is Raisio, 8.0 km away.
Topography around Naantali
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Naantali.
Within 3 km, the terrain around Naantali has only modest variations in elevation — a maximum elevation change of 49 m around an average of 13 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 73 m; within 80 km, significant variations in elevation — a maximum elevation change of 263 m.
The land around Naantali is covered by trees (45%) and water (28%) within 3 km, trees (48%) and water (25%) within 16 km, and water (43%) and trees (41%) within 80 km.
Finland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 85% of US
- price level, 2025
- GDP per capita
- $56,149
- 2025
- Happiness
- 7.8 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1
- per 100k, 2023
- Road deaths
- 3.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 603
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Naantali (60.4674°, 22.0243°, elevation 9 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.