Naantali Temperature by Month
Naantali, Southern Finland, Finland has an average annual maximum temperature of 10°C (50°F), ranging from 0°C (32°F) in February to 22°C (72°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Naantali Monthly Temperatures
The climate in Naantali is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 13°C (55°F) in July to -7°C (19°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Naantali by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 288 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Naantali Temperatures: 1976-2026
Browse day-by-day temperature records for Naantali spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Naantali vs Finland
The map below shows the annual temperature across Finland. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Naantali vs World: Temperature Compared
Naantali's average annual maximum temperature is 10°C (50°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Naantali this rarely lasts long on the ground.
For more on Naantali's weather — including monthly rainfall, sunshine hours, and humidity — visit our Naantali climate page.
