The Lithuanian climate is formed and affected by the global factors and local geographical circumstances. Key features of the climate depend on the geographical location of the territory. Lithuania is located in the northern part of the temperate climate zone. The second global factor is the prevailing westerly airflow. Lithuanian territory, as the whole European region, lies in the area of influence of the Atlantic Ocean and westerly air flow, with air temperature, precipitation and runoff patterns, sea level and other parameters being largely determined by the North Atlantic Oscillation. The average annual temperature in Lithuania is 6.9°C. The 1981-2010 climatic normal precipitated rainfall is 694 mm. Most precipitation drops in west side.
- In 2011-2016 compared to 1981-2010 it increased by 0.7°C, which shows climate warming. The most striking trends of annual temperature warming are in the north-eastern part.
- Mostly temperature increased in autumn months by 0.9°C above 1981-2010 average.
- From 1981, the year 2015 was the warmest with the average annual air temperature in Lithuania of 8.3°C.
- At the end of the twentieth century the number of extremely hot days increased with the daily maximum air temperature equal to or above 30°C. In 1981-2010 about 3-4 days per year maximum temperature was equal of higher than 30°C.
- Due to the climate change, precipitation patterns in Lithuania territory are changing differently – in some places it is increasing, elsewhere decreasing (however, these changes are not very large).
- But there is the tendency that precipitation is increasing in Lithuania during the cold season and decline in the warm season.