Weather archive in Lang Son

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Date / Local time		T	Po	P	Pa	U	DD	Ff	ff10	ff3	N	WW	W1	W2	Tn	Tx	Cl	Nh	H	Cm	Ch	VV	Td	RRR	tR	E	Tg	E'	sss
2026 September 20, Sunday	22	25.3 78	736.9 29.01 982.45 982.45	759.4 29.9 1012.45 1012.45	1.1 0.04 1.47 1.47	90	Calm, no wind	Calm			no clouds no clouds no clouds											10.0 6.2	23.5 74
	19	28.4 83	735.8 28.97 980.99 980.99	758.1 29.85 1010.72 1010.72	-0.2 -0.01 -0.27 -0.27	80	Calm, no wind	Calm			10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0						Cumulus humilis or Cumulus fractus other than of bad weather, or both.	10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0	300-600 984-1968	No Altocumulus, Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	10.0 6.2	24.6 76
	16	33.1 92	736.0 28.98 981.25 981.25	757.8 29.83 1010.32 1010.32	-1.5 -0.06 -2 -2	47	Calm, no wind	Calm			20–30%. 2/10–3/10. 2 oktas						Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level.	20–30%. 2/10–3/10. 2 oktas	600-1000 1968-3281	No Altocumulus, Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	15.0 9.3	20.2 68
	13	32.7 91	737.5 29.04 983.25 983.25	759.6 29.91 1012.72 1012.72	-1.7 -0.07 -2.27 -2.27	50	Wind blowing from the west	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)			40%. 4/10. 3 oktas	Clouds generally forming or developing.	Fog or ice fog or thick haze.	Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period.			Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level.	40%. 4/10. 3 oktas	600-1000 1968-3281	No Altocumulus, Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	15.0 9.3	21.1 70
	10	28.9 84	739.2 29.1 985.52 985.52	761.5 29.98 1015.25 1015.25	0.2 0.01 0.27 0.27	67	Calm, no wind	Calm			20–30%. 2/10–3/10. 2 oktas	Clouds generally forming or developing.	Fog or ice fog or thick haze.	Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period.			Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level.	20–30%. 2/10–3/10. 2 oktas	600-1000 1968-3281	No Altocumulus, Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	15.0 9.3	22.1 72
	07	22.9 73	739.0 29.09 985.25 985.25	761.8 29.99 1015.65 1015.65		97	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas	Fog or ice fog, sky visible, no appreciable change during the preceding hour.	Fog or ice fog or thick haze.	Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period.	22.2 72		Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	70 – 80%. 7/10 – 8/10. 6 oktas	300-600 984-1968			0.5 0.3	22.4 72