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 May 22, Friday	07	26.4 80	731.7 28.81 975.52 975.52	754.0 29.69 1005.25 1005.25	1.1 0.04 1.47 1.47	89	Wind blowing from the south	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas				25.5 78		Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	300-600 984-1968			15.0 9.3	24.5 76
	04	25.6 78	730.6 28.76 974.05 974.05	752.9 29.64 1003.78 1003.78	-0.6 -0.02 -0.8 -0.8	90	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas						Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	70 – 80%. 7/10 – 8/10. 6 oktas	300-600 984-1968			10.0 6.2	23.8 75
	01	25.5 78	731.2 28.79 974.85 974.85	753.4 29.66 1004.45 1004.45	-0.4 -0.02 -0.53 -0.53	91	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas						Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	70 – 80%. 7/10 – 8/10. 6 oktas	300-600 984-1968			10.0 6.2	24.0 75
May 21, Thursday	22	25.5 78	731.6 28.8 975.39 975.39	753.9 29.68 1005.12 1005.12	1.7 0.07 2.27 2.27	91	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas						Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	70 – 80%. 7/10 – 8/10. 6 oktas	300-600 984-1968			10.0 6.2	24.0 75
	19	26.1 79	729.9 28.74 973.12 973.12	752.2 29.61 1002.85 1002.85	-0.1 -0 -0.13 -0.13	93	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas	State of sky on the whole unchanged.	Thunderstorm(s) with or without precipitation.	Shower(s).		30.5 87	Cumulus humilis or Cumulus fractus other than of bad weather, or both.	70 – 80%. 7/10 – 8/10. 6 oktas	300-600 984-1968			10.0 6.2	24.8 77	78.0 3.07	24
	16	27.4 81	730.0 28.74 973.25 973.25	752.1 29.61 1002.72 1002.72	-1.2 -0.05 -1.6 -1.6	81	Calm, no wind	Calm			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	Thunderstorm, slight or moderate, without hail, but with rain and/or snow at time of observation.	Thunderstorm(s) with or without precipitation.	Shower(s).			Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus.	90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	300-600 984-1968			4.0 2.5	23.9 75
	13	28.4 83	731.2 28.79 974.85 974.85	753.3 29.66 1004.32 1004.32		83	Calm, no wind	Calm			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	Thunderstorm, but no precipitation at the time of observation.	Shower(s).	Rain.			Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus.	90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	300-600 984-1968			15.0 9.3	25.2 77	76.0 2.99	18
	07	24.3 76	731.2 28.79 974.85 974.85	753.8 29.68 1004.98 1004.98	1.8 0.07 2.4 2.4	94	Calm, no wind	Calm			100%. 10/10. 8 oktas	Rain, not freezing, continuous, slight at time of observation.	Thunderstorm(s) with or without precipitation.	Shower(s).	24.0 75		Stratus fractus or Cumulus fractus of bad weather, or both (pannus), usually below Altostratus or Nimbostratus.	70 – 80%. 7/10 – 8/10. 6 oktas	300-600 984-1968	Altostratus opacus or Nimbostratus.		10.0 6.2	23.2 74	26.0 1.02	12