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You will find the answers to all these questions in the analysis below, but mostly in turn.
First of all, what do we call a summer day?
We call a summer day a day in which the maximum air temperature (hereinafter, Tmax) reaches or exceeds 20 degrees (Tmax ≥ 20). The day when the maximum air temperature reaches and exceeds 25 degrees (Tmax ≥ 25) is called not only summer,
but also hot. Days when the maximum air temperature reaches and exceeds 30 degrees (Tmax ≥ 30) are called heat.
How many days of summer are there in Lithuania per year?
In the climatic conditions of Lithuania (SKN 1991-2020), there is an average of 89 February, 39 hot days and 4 hot days a year.
On average, the highest number of summer days (Tmax ≥ 20) per year is found in southeastern Lithuania (100-105 days) and the lowest in the Samogitian coast and highlands in the Laukuva area (70- 75 days).
On average, the highest number of hot summer days (Tmax ≥ 25) per year is found in southeastern and southern Lithuania (35-45 days), and the lowest in the Samogitian coast and highlands (15-25 days).
Hot days (Tmax ≥ 30) are not common in Lithuania. They are most common in southeastern Lithuania (on average almost 7 days a year) and less common in the Curonian Spit, the Samogitian Highlands, and the eastern outskirts (1-3 days).
It is worth mentioning that the number of hot days in both summer and summer increased compared to 1981-2010. and 1991-2020 SKN.
Are summer days just summer?
Summer days (Tmax ≥ 20) may not be only in Lithuania in summer. On those hot summer days, when the daily maximum temperature exceeds 20 degrees, it can be April-October.
Hot days in February (Tmax ≥ 25) can occur in April-September and hot days (Tmax ≥ 30) can occur in May-September.
How many days have there been to summer due to climate change?
Analyzing the period from 1961 to 2020, there is a notable increase in the number of summer days in Lithuania. The number of summer days (Tmax ≥ 20) increased the most on the coast and especially in Klaipeda, even by 45 days in 60 years!
However, the number of hot and hot days at the seashore has increased the least. The number of hot days increased the most in the southwestern part of Lithuania (20 to 21 days) and the number of hot days in the southern part and the Ukmergė area (3 to 4 days).
