Hanko Temperature by Month

Hanko in Southern Finland, Finland sees significant seasonal temperature differences, with daytime highs between 0°C (32°F) in February and 20°C (68°F) in August, averaging 9°C (48°F) annually. Explore the full monthly breakdown below.

The climate in Hanko is dynamic, ranging widely from very cold in winter to pleasant in summer. Nights are significantly colder, with lows dropping from 16°C (61°F) in August to -5°C (23°F) in February.

The chart below illustrates the average maximum day and minimum night temperatures in Hanko by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating.

The chart below shows the average temperature throughout the year:

Hanko's average annual maximum temperature is 9°C (48°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Hanko's weather, including monthly rainfall, sunshine hours, and humidity, visit our Hanko climate page.