[en] The present paper discusses the variability of the beginning and duration of the climatic seasons determined on the basis of the meteorological data registered at Tartu during the period 1891-1996. The results of regression analysis show that in the course of the 106 years under consideration the beginnings of the climatic seasons of the spring period have shifted to earlier dates, the beginning of summer even by I I days, and the beginnings of the climatic seasons of the autumn period have shifted to a later time. As a result, summers have lengthened by nearly two weeks and the cold half-year has shortened by the same length of time

[en] The publication describes different investigations about the climate of Estonia during centuries. The coverage of Estonian territory with meteorological information, snow cover and surface albedo, types of winter and spring seasons, wind climate and climate change are also discussed

[en] During last 100-150 years global climate has changed significantly. Climate warming has also observed in Estonia. The aim of this paper is to analyse how different are old climate normals calculated for 1881-1880 from present-day normals (1966-1998). The new normals are calculated for monthly and annual mean air temperature at 22 stations in Estonia. Mean monthly and annual precipitation totals and snow cover duration are found at 69 stations and observation sites. Significant differences were determined between the old and new averages. As a rule, air temperature has increased while 0.4 deg C in case of annual values. Snow cover duration has decreased during this century. Its new normals are lower by 5-10 days, what is a direct consequence of climate warming

[en] The aim of the study was to analyse trends and regime shifts in time series of monthly, seasonal and annual precipitation in the eastern Baltic countries (Lithuania, Latvia, Estonia) during 1966–2015. Data from 54 stations with nearly homogeneous series were used. The Mann-Kendall test was used for trend analysis and the Rodionov test for the analysis of regime shifts. Rather few statistically significant trends (p < 0.05) and regime shifts were determined. The highest increase (by approximately 10 mm per decade) was observed in winter precipitation when a significant trend was found at the large majority of stations. For monthly precipitation, increasing trends were detected at many stations in January, February and June. Weak negative trends revealed at few stations in April and September. Annual precipitation has generally increased, but the trend is mostly insignificant. The analysis of regime shifts revealed some significant abrupt changes, the most important of which were upward shifts in winter, in January and February precipitation at many stations since 1990 or in some other years (1989, 1995). A return shift in the time series of February precipitation occurred since 2003. The most significant increase in precipitation was determined in Latvia and the weakest increase in Lithuania.