MAIN WEATHER AND CLIMATE TRAITS IN THE NORTHEN HEMISPHERE AS OF MAY 2023
Air temperature
From the first days of May, colds were pouncing upon Central Russia. Frosts in the Tula, Ryazan, Tambov, Orel, Kaluga, Lipetsk and Smolensk Regions reached the record-breaking strengths. The same took place in the Volga region (the Ulyanovsk and Samara Regions as well as the Republic of Tatarstan), although the air temperature in this area exceeded +30° as lately as on the first of May. And eventually, the average air temperature in the first decade turned out to be one to four or more degrees lower than the normal value.
The weather in the second decade did not become milder. Frosts were still recorded in the Kostroma, Yaroslavl and Tver Regions. However, warm weather already came to the Russian North were the temperature could reach +25° in some places, and new daily temperature maxima were observed.
It was only in the third decade when anomalous warmth occupied almost the entire European Territory of Russia (ETR) and resulted in the decade-averaged anomalies reaching +8-10° in the north and +4…6° in the Volga region.
MAIN WEATHER AND CLIMATE TRAITS IN THE NORTHEN HEMISPHERE AS OF APRIL 2023
Air temperature
This April in the ETR may be considered relatively warm: it was among the fifteen warmest ones in 133 years of regular meteorological observations. The monthly-averaged temperature in most of the ETR was 2-3° higher than normal during the whole month and up to 5° higher in the first and third decades. New daily maxima were recorded in the centre and in the Russian North. At the same time, the colds broke far to the south on individual days, with frosts down to -4° amid the blossom of fruit trees and shrubs in the Volgograd and Astrakhan Regions as well as in the Stavropol Territory.
The weather in the Urals and in Siberia was entirely different: the record-breaking colds were observed there, and new daily temperature minima were set in the Krasnoyarsk and Altai Territories, in the Republic of Altai and in the Baikal region. The temperature averages were 5-10° lower than normal in the first and second decades of the month, and the warmth in the third decade came to the north only, with the south still under the spell of abnormal colds. The monthly-averaged air temperature in the Siberian Federal District was 2.6° below the normal value.