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
2025 September 16, Tuesday	04	23.0 73	735.4 28.95 980.45 980.45	757.9 29.84 1010.45 1010.45	-0.2 -0.01 -0.27 -0.27	98	Calm, no wind	Calm			Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena.	Fog or ice fog, sky invisible, no appreciable change during the preceding hour.	Fog or ice fog or thick haze.	Fog or ice fog or thick haze.								0.5 0.3	22.7 73
2025 September 16, Tuesday	01	23.5 74	735.6 28.96 980.72 980.72	758.2 29.85 1010.85 1010.85	-0.2 -0.01 -0.27 -0.27	98	Calm, no wind	Calm			Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena.	Fog or ice fog, sky invisible, 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.								0.5 0.3	23.2 74
September 15, Monday	22	23.7 75	735.8 28.97 980.99 980.99	758.4 29.86 1011.12 1011.12	1.6 0.06 2.13 2.13	96	Calm, no wind	Calm			no clouds no clouds no clouds											10.0 6.2	23.1 74
	19	24.6 76	734.2 28.91 978.85 978.85	756.8 29.8 1008.98 1008.98	0.3 0.01 0.4 0.4	93	Calm, no wind	Calm			no clouds no clouds no clouds	State of sky on the whole unchanged.	Thunderstorm(s) with or without precipitation.	Rain.		31.8 89						10.0 6.2	23.4 74	2.0 0.08	24
	16	24.9 77	733.9 28.89 978.45 978.45	756.5 29.78 1008.58 1008.58	-0.7 -0.03 -0.93 -0.93	96	Calm, no wind	Calm			100%. 10/10. 8 oktas	Rain, not freezing, continuous, slight at time of observation.	Thunderstorm(s) with or without precipitation.	Rain.			Stratus fractus or Cumulus fractus of bad weather, or both (pannus), usually below Altostratus or Nimbostratus.	60%. 6/10. 5 oktas	300-600 984-1968	Altostratus opacus or Nimbostratus.		10.0 6.2	24.3 76
	13	29.1 84	734.6 28.92 979.39 979.39	756.7 29.79 1008.85 1008.85	-1.2 -0.05 -1.6 -1.6	69	Wind blowing from the south-east	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)			50%. 5/10. 4 oktas	Thunderstorm, but no precipitation at the time of observation.	Thunderstorm(s) with or without precipitation.	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.			Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus.	50%. 5/10. 4 oktas	300-600 984-1968	No Altocumulus, Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	15.0 9.3	22.9 73
	10	29.7 85	735.8 28.97 980.99 980.99	757.9 29.84 1010.45 1010.45	0.4 0.02 0.53 0.53	75	Wind blowing from the east	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)			70 – 80%. 7/10 – 8/10. 6 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.	Cirrostratus not progressively invading the sky and not entirely covering it.	15.0 9.3	24.8 77
	07	24.8 77	735.4 28.95 980.45 980.45	757.9 29.84 1010.45 1010.45	1.0 0.04 1.33 1.33	98	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas				24.1 75		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	600-1000 1968-3281	No Altocumulus, Altostratus or Nimbostratus.	Cirrostratus not progressively invading the sky and not entirely covering it.	15.0 9.3	24.5 76
	04	24.2 76	734.4 28.91 979.12 979.12	757.0 29.8 1009.25 1009.25	-0.1 -0 -0.13 -0.13	99	Calm, no wind	Calm			20–30%. 2/10–3/10. 2 oktas						Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus.	20–30%. 2/10–3/10. 2 oktas	300-600 984-1968	No Altocumulus, Altostratus or Nimbostratus.	No Cirrus, Cirrocumulus or Cirrostratus.	10.0 6.2	24.0 75