Which is longer, summer or winter?

Which is longer, summer or winter?

Mio Alasentie, 5

In Aeronautics the seasons are outlined using the so-called thermal seasons. Their definition is based on temperatures. Using thermal seasons is a precise way to define the seasons.

Winter is the time of the year when the daily temperature mostly stays below zero. When the average temperature rises permanently above zero, spring begins.

When the temperature mostly stays above 10 degrees, summer begins. Summer ends and turns into autumn, when the average temperature drops below 10 plus degrees again.

The answer to the question depends on where you are. For example, on the southern coast of Finland, summer lasts about 130 days and winter about 110 days. In Helsinki and Turku, for example, the summer is a little longer than the winter.

But as you go further north, the winter gets longer and the summer gets shorter. In Tampere they are approximately the same length. North of Tampere, i.e. in most of Finland, winter is longer than summer.

In the northern parts of Lapland, summer lasts less than three months and winter lasts half a year, so winter there is twice as long as summer.