Weather archive on Mount Washington (AWS)

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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 August 18, Tuesday	11	11.2 52	606.2 23.87 808.2 808.2		0.4 0.02 0.53 0.53	89	variable wind direction	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas	Fog or ice fog, sky visible (has become thinner 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.			Stratocumulus cumulogenitus.	90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas		No Altocumulus, Altostratus or Nimbostratus.	Cirrus spissatus, in patches or entangled sheaves, which usually do not increase and sometimes seem to be the remains of the upper part of a Cumulonimbus; or Cirrus castellanus or floccus.	1.6 1.0	9.4 49
	08	9.5 49	605.8 23.85 807.67 807.67		0.3 0.01 0.4 0.4	98	Wind blowing from the north-west	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)			10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0	Fog or ice fog.	Rain.	Fog or ice fog or thick haze.	9.5 49	12.9 55	Stratocumulus cumulogenitus.	100%. 10/10. 8 oktas		No Altocumulus, Altostratus or Nimbostratus.	Cirrus fibratus, sometimes uncinus, not progressively invading the sky.	71.0 44.1	9.2 49	11.0 0.43	6
	05	11.1 52	605.5 23.84 807.27 807.27		-0.3 -0.01 -0.4 -0.4	100	Wind blowing from the west-southwest	Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft)			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.	Rain, not freezing, continuous, slight at time of observation.	Rain.	Fog or ice fog or thick haze.								0.2 0.1	11.1 52
	02	11.7 53	605.8 23.85 807.67 807.67		-0.2 -0.01 -0.27 -0.27	100	Wind blowing from the south-southeast	Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft)			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.	Rain, not freezing, continuous, moderate at time of observation.	Shower(s).	Rain.	9.8 50	12.9 55						0.1 0.06	11.7 53	11.0 0.43	6
August 17, Monday	23	11.6 53	606.0 23.86 807.93 807.93		0.3 0.01 0.4 0.4	100	variable wind direction	Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft)			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.	Rain shower(s), moderate or heavy.	Shower(s).	Fog or ice fog or thick haze.								0.2 0.1	11.6 53
	20	11.2 52	605.7 23.85 807.53 807.53		0.3 0.01 0.4 0.4	99	Wind blowing from the north-west	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	Fog or ice fog, sky visible, has begun or has become thicker during the preceding hour.	Shower(s).	Fog or ice fog or thick haze.	9.8 50	12.9 55	Stratocumulus cumulogenitus.	70 – 80%. 7/10 – 8/10. 6 oktas	Less than 50 Less than 50	Altocumulus translucidus at a single level.	Cirrus spissatus, in patches or entangled sheaves, which usually do not increase and sometimes seem to be the remains of the upper part of a Cumulonimbus; or Cirrus castellanus or floccus.	0.1 0.06	11.0 52	Trace of precipitation Trace of precipitation	6
	17	12.3 54	605.4 23.83 807.13 807.13		0.2 0.01 0.27 0.27	100	Wind blowing from the west-northwest	Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft)			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.	Shower(s).	Fog or ice fog or thick haze.								less than 0.1 less than 0.06	12.3 54
	14	12.2 54	605.2 23.83 806.87 806.87		0.0 0 0 0	100	Wind blowing from the west-northwest	Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft)			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.	Shower(s).	Drizzle.	9.2 49	12.2 54						less than 0.1 less than 0.06	12.2 54	2.0 0.08	6
	11	11.6 53	605.2 23.83 806.87 806.87		0.3 0.01 0.4 0.4	100	Wind blowing from the west	Strong breeze (11 m/s) (40 km/h) (25 miles/hour) (21 mile/hour) (6 Bft)			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.	Rain shower(s), slight.	Shower(s).	Drizzle.								0.1 0.06	11.6 53