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The first warm day of the year was Easter Sunday. While no records have been broken, there are not many cases in the history of meteorological observations that April 11. the air temperature has reached at least 20 ° C. However, in the third decade of April, we also had snow and colder weather. Such spring fluctuations are quite common.
Actual seasons, measured in terms of weather, often do not coincide with calendar months. In meteorology, the beginning and end of a certain time of the year are estimated by a constant change in the average daily air temperature above a certain limit. In the spring, the three most important are limits.
According to the SKN, in mid-April (04-07) the daily air temperature constantly exceeds 5 ° C and the beginning of vegetation is announced, which we cannot announce in Lithuania this year. That means that spring is very late this year.
According to perennial values, at the end of April the average daily air temperature (04-29 days) exceeds 10 ° C and the beginning of active vegetation is announced. And a meteorological summer, when the air temperature exceeds 15 ° C, occurs at the beginning of the calendar summer (06-04). And these weather seasons will have to wait.
The second half of May in Lithuania is expected ** to be up to 0.5 ° C warmer than usual. Overall for the entire month of May, the air temperature is expected to be close to normal for May (SKN * 12.5 ° C).
Sakuras and daffodils bloom at Druskininkai
© Photo by R. Sadauskas – Kvietkevičius
In the second half of May, rainfall is expected to be up to 5% higher than usual, and rainfall throughout May is expected to be up to 10% higher than normal (SKN 53mm).
In summary, we can say that in May we can expect sufficient conditions for a normal Lithuania.
From 1961 to the present:
- The three warmest Mays were recorded in Lithuania: 2018 (average monthly air temperature 16.4 ° C), 1993 and 2013 (15.4 ° C),
- The three coldest: 1980 (7.9 ° C), 1965 (8.6 ° C) and 1962 and 1974 (9.6 ° C),
- The lowest daily air temperature was recorded in Varėna on May 5, 1965 and dropped to -6.8 ° C.
- The highest daily air temperature was recorded in Druskininkai on 05-28-1892 at +34.0 ° C.
- The highest amount of precipitation was recorded: 1962 (99 mm), 1983 (89 mm), 1996 (86 mm),
- Minimum: 2017 (13 mm), 1978 and 1993 (24 mm).
* SKN is a standard climatic norm, which is the average value of meteorological elements in Lithuania in 1991-2020.
** Based on April 27, 2021. data.
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