Statistics Bratsk Airport 2019-2023

Climate and trends: average temperature, flight conditions, precipitation, wind speed and direction.

Calculated from historical METAR data of Bratsk Airport (UIBB) between 2019 and 2023.

VFR conditions (%)

Month	Average	2023	2022	2021	2020	2019
January	60.8	58	47	57	64	66
February	67.0	74	58	75	71	76
March	81.4	81	84	90	65	80
April	87.0	84	82	84	95	89
May	88.3	87	91	86	84	92
June	93.0	89	93	92	93	96
July	79.5	96	82	91	91	56
August	75.3	85	60	57	95	77
September	75.8	85	66	85	79	80
October	71.4	77	69	77	69	71
November	61.3		61	63	60	60
December	57.0		48	63	57	56
Average	77.5	82.9	73.5	78.6	79.6	76.6

44th best VFR conditions of Russia

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met:

• Visibility: 8 km or more
• Ceiling: 3,000 ft or more

Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month	Average	2023	2022	2021	2020	2019
January	84.2	81	76	86	84	86
February	87.0	91	82	88	90	89
March	94.1	93	94	98	90	93
April	96.4	94	95	96	100	95
May	98.5	97	98	98	99	99
June	99.2	99	100	98	100	100
July	91.7	100	93	98	99	66
August	91.3	98	92	70	99	97
September	94.6	99	91	98	93	98
October	95.8	94	98	99	96	97
November	89.6		95	92	88	92
December	84.4		81	87	84	82
Average	93.3	95.3	92.5	92.8	94.6	91.5

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met:

• Visibility: 5 km or more
• Ceiling: 1,000 ft or more

Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month	Average	2023	2022	2021	2020	2019
January	-16.2	-17	-14	-21	-11	-13
February	-12.4	-10	-12	-14	-8	-14
March	-2.1	-1	-5	-3	-2	0
April	5.8	1	6	4	12	5
May	13.8	13	18	12	15	13
June	22.1	21	22	21	21	23
July	23.1	24	21	25	23	24
August	20.6	22	16	22	23	21
September	12.4	16	10	11	14	14
October	4.4	7	3	5	3	3
November	-8.8		-7	-4	-5	-10
December	-16.5		-17	-14	-16	-14
Average	4.5	7.8	4.2	3.6	5.8	4.4

70th highest temperature of Russia

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2023	2022	2021	2020	2019
January	-24.9	-25	-20	-29	-18	-21
February	-21.7	-18	-21	-23	-17	-22
March	-12.9	-11	-14	-13	-10	-9
April	-4.7	-8	-3	-5	1	-4
May	3.4	3	6	1	5	3
June	11.3	11	11	10	11	12
July	13.3	14	12	14	13	15
August	10.6	13	8	11	12	11
September	3.3	4	2	2	5	4
October	-4.9	-2	-2	-4	-4	-4
November	-14.2		-13	-10	-10	-17
December	-23.9		-22	-22	-22	-21
Average	-5.7	-2.3	-5.9	-6.5	-3.1	-5.6

12th lowest temperature of Russia

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2023	2022	2021	2020	2019
January	39.9	45	36	44	38	36
February	31.1	31	29	32	25	16
March	24.0	26	24	14	39	25
April	11.4	19	15	13	2	10
May	9.0	11	3	9	16	7
June	5.8	9	3	5	8	6
July	7.1	4	14	2	7	9
August	8.7	6	21	4	2	6
September	13.8	3	23	10	13	9
October	18.6	14	22	9	20	29
November	41.7		37	38	35	43
December	48.3		55	36	50	43
Average	18.0	14.6	19.7	14.8	18.4	17.0

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (knots)

Month	Average	2023	2022	2021	2020	2019
January	5.6	6	3	7	6	6
February	5.6	6	6	7	5	5
March	8.2	10	8	8	11	7
April	9.0	9	9	9	8	10
May	8.7	9	9	8	9	9
June	6.4	7	7	7	7	6
July	5.8	6	6	6	6	6
August	6.2	5	8	6	6	6
September	6.7	6	7	6	8	7
October	7.1	8	7	7	8	7
November	7.1		7	8	7	7
December	6.5		9	6	7	6
Average	7.0	7.1	7.0	6.9	7.1	6.8

70th highest wind speed of Russia

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2023	2022	2021	2020	2019
January	242°	226°	261°	203°	240°
February	242°	234°	239°	213°	223°
March	241°	246°	236°	249°	264°
April	248°	261°	259°	303°	242°
May	287°	277°	293°	292°	259°
June	255°	236°	257°	272°	020°
July	259°	262°	235°	297°	330°
August	262°	249°	285°	352°	238°
September	279°	260°	294°	269°	256°
October	234°	237°	246°	237°	250°
November		244°	241°	248°	243°
December		262°	250°	246°	232°

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.