Climate characteristic of autumn 2021

The above zero air temperature anomaly spread almost throughout the country, with the exception of certain areas in the northeast and south, and was in the range of 0.1-1.5°C. The negative anomalies were insignificant and were recorded over a small area.

Deviation (°С) of the average air temperature in the fall season of 2021.

from the climatic norm on the territory of Belarus

In the regional context, the largest above zero air temperature anomaly for the autumn season was noted in the Grodno and Brest regions (on average, 0.8°С for each region). The smallest is in the Gomel region (average for the region is 0.3°C).The air temperature during the autumn season was not uniform.

Average air temperature and climatic norm by months

autumn season 2021 in the Republic of Belarus

The average air temperature in Belarus for the first autumn month of 2021 was +10.8°C, which is 1.3°C below the climatic norm. This and lower air temperature per month is noted on average once every 4-5 years, and the last time was in 2000. The below zero air temperature anomaly spread throughout the country, reaching the highest values in the Mogilev region (-1.6°C). The average air temperature for all three decades was below normal. The maximum air temperature for the month, as well as for the autumn season, was recorded at Gantsevichi station on September 11 and amounted to + 26.6°С. The minimum temperature value (-3.4°С) was noted at Yezerishche station on September 30.

In the third ten-day period of August - the first ten-day period of September, in terms close to the usual, a stable transition of the average daily air temperature through 15°C towards a decrease took place (the end of the climatic summer).

On September 14-20, one to two weeks earlier than usual, and in the extreme southeast on October 7, at a time close to the usual, the active growing season ended (a stable transition of the average daily air temperature through 10 ° C towards a decrease).

On September 16-18, in the northern half of the country, there was a steady transition of the average daily air temperature over 8°С towards a decrease (the beginning of the heating period).

The average air temperature in Belarus in October 2021 was + 7.3°C, which is 0.6°C higher than the climatic norm. The above zero temperature anomaly spread throughout the country. The greatest values of positive deviations of air temperature from the climatic norm were noted in the Grodno region (+ 1.0°C), the lowest - in the Gomel region (+ 0.1°C). The temperature regime was non-uniform throughout the month. The first and second ten days of October were cold with an average air temperature of 0.7°C and 0.9°C below normal. The air temperature of the third decade was 3.0°C above the norm. The maximum air temperature reached on October 21 at Bragin station and amounted to +21.1°С. The minimum air temperature was recorded at the Yezerishche station on October 9 and amounted to -6.6°С.

On October 7-14, in the Southern half of the country, with the exception of the extreme Western and South-Western regions of the country, a steady transition of the average daily air temperature through 8°C towards a decrease took place (the beginning of the heating period).

The average air temperature in Belarus for the last autumn month of 2021 was +3.3°C, which is 2.4°C higher than the climatic norm. November 2021 was ranked 5th from highest to lowest in the series of observations since 1945. In the regional context, the greatest above zero air temperature anomaly for the month was noted in the Mogilev region (on average, 2.7°C in the region). The smallest is in Brest (regional average 2.3°C). The air temperature in all three decades was significantly higher than normal. The average temperature in the first decade was 2.9°C above the norm, in the second - by 1.8°C, in the third - by 2.7°C. At stations Vitebsk, Ezerishche, Polotsk and Senno, 95% daily temperature extremes were exceeded. The maximum air temperature was recorded at Bragin station on November 5 and amounted to + 15.5°С. The minimum temperature value (-12.6°С) for the month and for the autumn season was noted at Bobruisk station on November 23.

In the first week of November, in the extreme west and Southwest (Grodno and Brest), a steady transition of the average daily air temperature through 8°C towards a decrease took place (the beginning of the heating period).

On November 7-9, in most of the country, with the exception of Grodno and Brest stations (November 22), the end of the growing season was marked 2-3 weeks later than usual.

During the season, 157.6 mm of precipitation fell on average in the republic, which amounted to 101% of the climatic norm. Over the territory of the country, precipitation fell unevenly: in the central part, in the North-West and North-East, 110% of the norm and more was noted. In the south of the country - 90% or less.

Deviation (%) of precipitation amount for autumn 2021 from climatic

In the regions, the largest amount of precipitation was noted in the territory of the Minsk region - an average for the region is 186 mm or 122% of the norm. Least of all - on the territory of Gomel and Brest regions 114 and 112 mm or 74 and 80% of the norm, respectively.

by regions and territory of Belarus

During the season, the rainfall pattern was uneven. In September, on average, 90 mm of precipitation fell in the republic, which amounted to 151% of the climatic norm. September with such and a large amount of precipitation is noted on average throughout the country once every 10-11 years, and the last time in 1998. Most precipitation fell on the territory of the Mogilev region - an average of 115 mm in the region (198% of the climatic norm). During the month, precipitation fell unevenly. In the first decade, there was a shortage of precipitation (34% of the norm), in the second and third days, 276 and 148% of the norm, respectively, fell. At some observation points in Grodno, Minsk, Brest and Gomel regions, 95% of the daily extremes of precipitation amounts were exceeded.

In October 2021, there was a shortage of precipitation across the country and an average of 15 mm fell (29% of the climatic norm). Precipitation fell unevenly throughout the country. The most humidified was the Vitebsk region, on the territory of which 31 mm or 52% of the norm fell per month. The least precipitation fell on the territory of the Gomel region - 4.0 mm or 8% of the climatic norm. So dry here was noted for the second time during the observation period since 1945. The lack of precipitation was noted in all three decades (14%, 35% and 38%, respectively). At most observation points in the central and southern parts of Belarus, daily maximum precipitation was noted below the 5% percentile.

In November, on average, 53 mm of precipitation fell in the republic, which amounted to 115% of the climatic norm. In the regions, the most precipitation was noted on the territory of the Vitebsk region - an average of 78 mm in the region, or 159% of the norm. Least of all - on the territory of the Gomel region 30 mm or 66% of the norm. At Vitebsk, Senno and Orsha stations, 95% daily extremes of precipitation totals were exceeded. During the month, precipitation fell unevenly. In the first and especially in the second decades, there was a lack of precipitation (82 and 49% of the norm, respectively), in the third, excessive moisture was noted (215% of the norm fell).

 

Rainfall and climatic norm

autumn season 2021 in the Republic of Belarus

Precipitation fell in the form of rain, snow and sleet. Fogs, sleet and sleet were observed on some days. In the first half of the season - thunderstorms and hail in places. In some areas, an increase in wind speed by gusts of up to 15 m/s and more was noted. The maximum wind speed was recorded at Klichev station on September 3 (24 m/s).