Weather archive in Chiang Rai

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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 21, Monday	05	22.6 73	727.0 28.62 969.25 969.25	758.6 29.87 1011.38 1011.38				Calm							21.3 70	34.2 94								No precipitation No precipitation	1
	04	22.5 73	726.5 28.6 968.59 968.59	759.7 29.91 1012.85 1012.85	-1.3 -0.05 -1.73 -1.73	98	Calm, no wind	Calm			100%. 10/10. 8 oktas	Clouds generally forming or developing.	Rain.	Cloud covering more than 1/2 of the sky throughout the appropriate period.			Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	40%. 4/10. 3 oktas	600-1000 1968-3281	Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered.	10.0 6.2	22.2 72	0.4 0.02	3
	03	22.2 72	727.0 28.62 969.25 969.25	758.6 29.87 1011.38 1011.38				Calm							21.3 70	34.2 94								1.0 0.04	1
	01	21.6 71	727.8 28.65 970.32 970.32	761.2 29.97 1014.85 1014.85	-0.3 -0.01 -0.4 -0.4	98	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.	Rain.			Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus.	60%. 6/10. 5 oktas	600-1000 1968-3281	Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered.	10.0 6.2	21.3 70	40.0 1.57	18
	00	22.3 72	728.5 28.68 971.25 971.25	760.1 29.93 1013.38 1013.38			Wind blowing from the south-east	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)							22.3 72	34.2 94								13.0 0.51	1
September 20, Sunday	23	25.7 78	728.1 28.67 970.72 970.72	759.7 29.91 1012.85 1012.85			Wind blowing from the west-southwest	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)							24.6 76	34.2 94								No precipitation No precipitation	1
	22	25.7 78	728.1 28.67 970.72 970.72	761.0 29.96 1014.58 1014.58	2.1 0.08 2.8 2.8	95	Calm, no wind	Calm			50%. 5/10. 4 oktas	State of sky on the whole unchanged.	Rain.	Cloud covering 1/2 or less of the sky throughout the appropriate period.			Stratocumulus other than Stratocumulus cumulogenitus.	20–30%. 2/10–3/10. 2 oktas	600-1000 1968-3281	Altocumulus translucidus at a single level.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon.	10.0 6.2	24.8 77	0.2 0.01	3
	21	25.6 78	727.7 28.65 970.19 970.19	759.4 29.9 1012.45 1012.45			Wind blowing from the south-west	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)							24.6 76	34.2 94								No precipitation No precipitation	1
	20	26.0 79	727.0 28.62 969.25 969.25	758.6 29.87 1011.38 1011.38			Wind blowing from the west	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)							24.6 76	34.2 94								No precipitation No precipitation	1
	19	27.3 81	726.0 28.58 967.92 967.92	758.7 29.87 1011.52 1011.52	0.5 0.02 0.67 0.67	81	Calm, no wind	Calm			50%. 5/10. 4 oktas					33.5 92	Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	20–30%. 2/10–3/10. 2 oktas	600-1000 1968-3281	Altocumulus translucidus at a single level.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon.	10.0 6.2	23.8 75
	18	27.0 81				77	Wind blowing from the north-east	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)							24.6 76	34.2 94							22.7 73
	17	31.2 88				63	Wind blowing from the north-east	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)							24.6 76	34.2 94							23.4 74
	16	31.0 88	725.5 28.56 967.25 967.25	757.7 29.83 1010.18 1010.18	-1.8 -0.07 -2.4 -2.4	61	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas						Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	50%. 5/10. 4 oktas	600-1000 1968-3281	Altocumulus translucidus at a single level.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon.	10.0 6.2	22.7 73
	15	34.0 93				55	Wind blowing from the north-northeast	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)							24.6 76	34.0 93							23.7 75
	14	32.2 90				59	Wind blowing from the east	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)							24.6 76	33.7 93							23.3 74
	13	33.1 92	727.3 28.63 969.65 969.65	759.4 29.9 1012.45 1012.45	-1.7 -0.07 -2.27 -2.27	58	Wind blowing from the north-northeast	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)			60%. 6/10. 5 oktas						Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	40%. 4/10. 3 oktas	600-1000 1968-3281	No Altocumulus, Altostratus or Nimbostratus.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon.	10.0 6.2	23.8 75
	12	32.0 90				62	Wind blowing from the north-east	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)							24.6 76	33.0 91							23.7 75
	11	30.6 87				63	Wind blowing from the north-northeast	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)							24.6 76	33.0 91							22.8 73
	10	29.9 86	729.0 28.7 971.92 971.92	761.5 29.98 1015.25 1015.25	0.5 0.02 0.67 0.67	69	Calm, no wind	Calm			50%. 5/10. 4 oktas						Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	20–30%. 2/10–3/10. 2 oktas	600-1000 1968-3281	Altocumulus translucidus at a single level.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon.	10.0 6.2	23.5 74
	09	27.3 81				85	Wind blowing from the north-northeast	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)							24.6 76								24.6 76
	08	25.7 78	729.1 28.7 972.05 972.05	760.7 29.95 1014.18 1014.18				Calm							24.6 76									No precipitation No precipitation	1
	07	25.0 77	728.5 28.68 971.25 971.25	761.5 29.98 1015.25 1015.25	1.4 0.06 1.87 1.87	95	Calm, no wind	Calm			70 – 80%. 7/10 – 8/10. 6 oktas				24.5 76		Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.	50%. 5/10. 4 oktas	600-1000 1968-3281	Patches (often lenticular) of Altocumulus translucidus, continually changing and occurring at one or more levels.	Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered.	10.0 6.2	24.1 75
	06	24.8 77	728.1 28.67 970.72 970.72	759.7 29.91 1012.85 1012.85			Wind blowing from the west-southwest	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)							24.2 76									No precipitation No precipitation	1
	05	24.7 76	727.7 28.65 970.19 970.19	759.4 29.9 1012.45 1012.45			Wind blowing from the south	Calm							24.1 75									No precipitation No precipitation	1