Naantali Weather in May
With daytime temperatures of 15°C (59°F) and nighttime lows of 5°C (41°F), May in Naantali brings moderate temperatures during the day. Some rainfall is to be expected during the month.
Rainfall in Naantali in May
Analyzing past climate data, one can expect approximately 10 days of rain, averaging 43 mm (1.7 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Naantali in May
May in Naantali sees highs of 15°C (59°F) and lows of 5°C (41°F) overnight. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights fall to 5°C (41°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Naantali in May
The month enjoys around 283 hours of sunshine, creating mostly sunny days despite the cool temperatures.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Naantali.
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 May
Min Temperature
5°C (41°F)
Max Temperature
15°C (59°F)
Chance of Rain
34%
Precipitation
43 mm (1.7 in)
Rainy days
10 days
Sunshine
283 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Naantali typically rise from around 11°C (52°F) at the start of May to approximately 17°C (63°F) by the end. Nights are cold, with lows typically ranging from 2°C (36°F) to 8°C (46°F).
Average temperatures in May
Historical weather for Naantali in May
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 May
Based on weather observations in Naantali between 1981 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 30, 1995, with a maximum of 28°C (82°F).
- On May 1, 1981, Naantali saw its coldest May day with temperatures maxing out at 2°C (36°F).
- The lowest overnight temperature recorded in May was -5°C (23°F) (May 12, 1999).
Best Places in Finland in May
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in May →
perfect weather
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tolerable
unpleasant
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What to Wear in Naantali in May
The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Naantali in May
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.
