Climate 108 Hospital South Tower Heliport 2020-2024

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

Calculated from historical METAR data of Noi Bai International Airport (VVNB) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	38.3	41	59	37	44	39
February	36.5	25	34	44	38	34
March	29.1	34	27	27	25	29
April	39.7		27	48	35	44
May	64.5		66	61	67	64
June	80.8		68	88	88	88
July	81.4		84	77	85	82
August	73.1		76	74	78	69
September	74.4		76	78	77	65
October	73.3		85	75	66	77
November	64.0		64	59	67	65
December	53.3		47	65	57	60
Average	56.1	33.3	59.7	61.2	60.8	59.6

8th best VFR conditions of Vietnam

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	65.3	75	81	68	60	65
February	66.1	62	53	66	70	54
March	62.6	62	74	50	54	72
April	76.3		59	84	78	75
May	92.9		94	90	97	94
June	96.3		95	97	97	99
July	96.8		98	97	97	97
August	92.6		93	94	97	91
September	93.4		94	95	94	93
October	91.7		95	90	88	96
November	84.4		88	82	87	81
December	79.0		75	95	81	83
Average	81.2	66.2	83.6	83.7	83.6	83.5

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	20.6	20	21	21	19	22
February	21.8	22	23	17	24	22
March	24.8	24	25	25	24	25
April	27.6		28	28	28	25
May	32.0		33	30	33	33
June	34.4		34	34	35	36
July	34.0		35	34	35	35
August	32.8		33	33	34	33
September	32.3		32	32	32	32
October	28.8		31	30	27	27
November	26.8		28	29	25	27
December	21.6		22	20	22	21
Average	27.4	22.1	28.8	27.9	28.2	28.1

7th highest temperature of Vietnam

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	15.2	16	14	16	13	17
February	16.5	17	18	13	17	17
March	19.7	19	20	20	21	20
April	21.9		23	21	23	19
May	24.8		25	23	26	26
June	26.8		26	27	27	28
July	26.8		27	27	27	27
August	26.0		25	26	27	26
September	25.4		26	25	25	26
October	22.3		24	22	22	22
November	19.7		20	22	19	20
December	15.0		16	14	15	15
Average	21.2	17.1	21.9	21.4	21.7	21.8

1st lowest temperature of Vietnam

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	10.4	17	1	13	6	9
February	11.9	15	17	23	9	12
March	11.7	12	4	11	17	14
April	10.6		17	9	12	15
May	6.2		3	12	4	3
June	5.8		8	6	6	3
July	8.3		8	9	8	3
August	13.3		8	14	5	16
September	8.2		11	12	8	9
October	10.5		3	8	28	12
November	4.5		3	4	5	8
December	6.8		7	1	2	2
Average	9.6	14.6	7.4	10.3	9.1	8.7

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	2024	2023	2022	2021	2020
January	5.6	6	5	6	5	6
February	6.0	7	6	6	5	5
March	6.3	6	6	6	6	7
April	6.4		6	7	7	6
May	6.4		7	6	7	6
June	5.6		6	5	5	7
July	5.7		6	6	6	7
August	5.3		5	5	6	6
September	5.0		5	5	5	6
October	5.8		6	6	6	7
November	5.3		5	5	5	6
December	5.7		6	6	4	6
Average	5.8	6.4	5.6	5.6	5.6	6.1

7th highest wind speed of Vietnam

Average wind speed

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

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	064°	030°	072°	045°	085°
February	088°	099°	034°	098°	067°
March	089°	102°	101°	113°	094°
April		097°	092°	109°	065°
May		097°	072°	116°	101°
June		096°	138°	090°	124°
July		091°	088°	132°	132°
August		038°	093°	102°	091°
September		018°	033°	031°	087°
October		023°	023°	008°	012°
November		044°	091°	020°	035°
December		037°	023°	019°	033°

Prevailing wind direction

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