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.

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:

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.