Extremely contrasting weather was observed in Ukraine in the first ten-day period of June. At the beginning of the ten-day period it was pretty cool, but then the summer heat replaced it.
The maximum air temperature on the warmest days increased in the western regions to 28-31 °C, in the rest of the country to 32-37 °C. In most areas (except for Lviv, Ivano-Frankivsk, Khmelnitsky, Ternopil and Chernivtsi) within 1-6 days it exceeded the mark of 30 °C.
Precipitation was observed throughout the territory – from insignificant and small in the southern, southeastern and places of the central regions, significant in the western and northern regions, when in some areas half of the monthly rainfall fell during the day. Thunderstorms, hail and squalls were observed throughout the territory.
The very contrasting temperature regime of the ten-day period was another stress for most crops. Throughout the country, in the first half of the ten-day period, plants suffered from insufficient heat and low night temperatures (in the 5 southern regions moisture as well), in the second half of the ten-day period – from extremely high air and soil temperatures for early June. Due to the combination of adverse conditions, yellowing of the leaves of the lower tier of most crops was observed in some places.
As of June 10, moistening of a meter layer of soil under winter crops in most areas of the western and northern parts of the central regions was optimal – 121-170 mm of productive moisture and excess – 171-218 mm of productive moisture. In most areas of the Kharkiv, Dnipropetrovsk, individual areas of Poltava, Cherkasy, Kirovograd, Vinnysa, Khmelnytsky, Volyn and Sumy regions, the reserves of productive moisture were optimal – 81-120 mm. Poor humidification (less than 40 mm of productive moisture) and insufficient moistening (51-80 mm) were observed in the southern, Donetsk, Luhansk, in most areas of Kirovograd, in some areas of Dnipropetrovsk, Cherkasy, Kyiv, Vinnytsya regions.
Despite the large temperature differences last spring and early summer, in the southern, southeastern and central regions, the ripening of winter crops began very early.