MAIN WEATHER AND CLIMATE TRAITS IN THE NORTHEN HEMISPHERE AS OF JUNE 2023
 
Air temperature
 
This summer started with cold weather in the ETR: in the first decade, the average air temperature was lower than normal almost everywhere, by three or more degrees lower in the North-West Federal District and in the north of the Central Federal District. Frosts were recorded in the Arkhangelsk, Murmansk, Vologda, Tver and Kostroma Regions. The abnormal colds spread to even larger area in the second decade, but reached their peak in the third decade when -3° anomalies were measured not only in the north of Russia, but in its central regions as well. Frosts and new temperature minima were now observed in Karelia, in the Murmansk, Tambov, Kostroma and Moscow Regions, as well as in the Perm Territory and the Republics of Komi and Bashkiria.
The Urals and most of Siberia basked in warmth in the first decade: there, positive anomalies of decade-averaged temperatures reached as high as +6…8°. The heat with new temperature maxima occupied the Tomsk, Kemerovo, Omsk, Novosibirsk and Tyumen Regions, the Altai Territory and the Republic of Altai, reaching or exceeding +35° in the south of Western Siberia or similar figures in the Krasnoyarsk Territory where the daily temperature maxima would be updated for several days in a row. However, everything changed in the second and third decades when the colds spread there as well, and the decade-averaged temperatures became 3-5 or more degrees lower than normal.
In Yakutia and in the north of the Far East, the weather was noticeably warmer than usual for most of June, and the temperature averages in the first and third decades were 3-6° higher than normal. New daily maxima in excess of +30-35° were set in Yakutia and in the Magadan Region, and the new maximum of air temperature in June equal to +31.7° was established in Oimyakon nicknamed "the pole of cold." In the north of the Far East, this June was the fourth warmest in the history of meteorological observations.

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.