Ministry of natural resources and environmental protection of the Republic of Belarus Map Republic BELHYDROMET
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01.10.2018

Climate characteristic of September 2018

  
Average air temperature was +15 °С in September across the country, that is 2,9°С above climate normal. Such a warm September is marked for the first time in the post-war period in Belarus. Positive anomaly was observed everywhere. The highest values were registered in Minsk and Gomel regions where was about +3,1°С on average. The lowest values were registered in Grodno region (+2,7°С).
                                                                     
                                                                   Deviation of average air temperature in September from the climate normal across the territory of Belarus
 
Warm weather was observed in the first and second decades. Average air temperature was 4,6 that is 4,0ºС above climate normal. Third decade was cooler, average air temperature was 0,3°С above climate normal.

Average air temperature in September and climate normal across the territory of Belarus
Daily air temperature raised up to +24+28°С in the first decade and reached +30°С in south of the country on September 4, 2018. Maximum air temperature (+30,2°С) was registered at meteorological stations Oktiabr and Pinsk. Daily maximums was in the range of +19+24 ºС in the middle of September, air temperature increased up to +25ºС and above on certain days. 
Sustained pass of average daily temperature to 15°С was completed in most of the country (except north regions) on September, 22-23 that is 2 decades later than previous year. Climate summer finished on those same dates. Climatologists consider that the end of the summer is an air temperature pass from +14ºС to lowest values. That long-term climate summer is observed in the post-war period for the first time. From that time air temperature has been starting to decrease rapidly. Pass of daily average temperature from 10°С was completed on September 23-25 (the end of vegetation period). That pass was completed on September 29, in the south-western regions. Average daily air temperature decreased up to 8ºС and less on September 29-30 that is considered to be the begging of heating season. 
Night air temperature ranged from +10 to +16 ºС in the first half of the month. On certain days it decreased up to +10ºС and less. Later it became cooler. Night air temperature ranged from +1ºС to +8ºС. Freezings with the intensity from 0º С to -2ºС were observed in the same areas on September 26. Freezing with the intensity from 0 to 3,5°С was observed on September 30.
Freezings with the intensity from 0 to -3ºС were observed on the soil surface throughout the large part of the country. At this time freezing in the air are registered at 30-60% of years, on the soil surface - usually at 50-70% of years. The lowest air temperature was registered on September 30 at meteorological station Polesskaya ( -3,5°С).

Amount of precipitations in September 2018 and climate normal across the regions and the territory of the Republic of Belarus 
On average 49 mm of precipitations (82% of climate normal) fell in a month throughout the country. Deficit of precipitations was lacking across all the territory of Belarus. The most moistened regions were Vitebsk and Brest regions where on average 53 mm of precipitations fell (80% and 94% of climate normal respectively). The least amount of precipitations was registered in Gomel region – 41 mm or 69% of climate normal. First and second decade were different in matters of significant deficit of precipitations with 37% and 50% of decade normal respectively. Precipitation excess was observed in the third decade – 164% of decade normal. Maximum daily amount of precipitations (40 mm) was registered in Volkovysk on September, 24.
Rains were mostly torrential, in some areas with thunderstorms, hails (up to 8 mm in Ivatsevitchi on September, 24) and intense winds up to 15 m\s and more. Maximum of winter speed (21 m/s) was registered in Slavgorod and Brest on September, 24. 
Short fogs closed down in certain areas at night and during daytime hours.

Amount of precipitations in September and climate normal for decades in the Republic of Belarus


 




 






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