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
2025 December 21, Sunday	04	-9.0 16	595.0 23.43 793.27 793.27		-0.9 -0.04 -1.2 -1.2	97	Wind blowing from the west	Violent storm (30 m/s) (108 km/h) (67 miles/hour) (58 knots) (11 Bft)			100%. 10/10. 8 oktas	Fog or ice fog.	Snow and/or other types of solid precipitation	Fog or ice fog or thick haze.			Stratocumulus other than Stratocumulus cumulogenitus.	100%. 10/10. 8 oktas				50.0 31.1	-9.4 15
2025 December 21, Sunday	01	-7.7 18	595.9 23.46 794.47 794.47		-2.6 -0.1 -3.47 -3.47	68	Wind blowing from the west-southwest	Hurricane (33 m/s) (119 km/h) (74 mph) (64 knots) (12 Bft)			100%. 10/10. 8 oktas	Continuous fall of snowflakes, slight at time of observation.	Snow and/or other types of solid precipitation	Fog or ice fog or thick haze.	-20.6 -5	-2.6 27	Stratus nebulosus or Stratus fractus other than of bad weather, or both.	70 – 80%. 7/10 – 8/10. 6 oktas	100-200 328-656	Altostratus opacus or Nimbostratus.		50.0 31.1	-12.6 9	Trace of precipitation Trace of precipitation	6
December 20, Saturday	22	-5.0 23	598.5 23.56 797.93 797.93		-0.1 -0 -0.13 -0.13	42	Wind blowing from the south-west	Violent storm (31 m/s) (112 km/h) (69 miles/hour) (60 knots) (11 Bft)			100%. 10/10. 8 oktas	Precipitation within sight, reaching the ground or the surface of the sea, but distant, i.e. estimated to be more than 5 km from the station.	Cloud covering more than 1/2 of the sky throughout the appropriate period.	Cloud covering more than 1/2 of the sky throughout the appropriate period.			Stratus nebulosus or Stratus fractus other than of bad weather, or both.	60%. 6/10. 5 oktas	300-600 984-1968	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.		71.0 44.1	-16.0 3
	19	-7.5 19	598.6 23.57 798.07 798.07		-1.3 -0.05 -1.73 -1.73	41	Wind blowing from the south-west	Strong gale (24 m/s) (86 km/h) (54 mph) (47 knots) (9 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	Precipitation within sight, not reaching the ground or the surface of the sea.	Cloud covering more than 1/2 of the sky throughout the appropriate period.	Cloud covering more than 1/2 of the sky throughout the appropriate period.	-20.6 -5	-6.8 20	Stratus nebulosus or Stratus fractus other than of bad weather, or both.	50%. 5/10. 4 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.	71.0 44.1	-18.5 -1
	16	-8.1 17	599.9 23.62 799.8 799.8		2.0 0.08 2.67 2.67	29	Wind blowing from the west	Storm (25 m/s) (90 km/h) (56 miles/hour) (49 knots) (10 Bft)			90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	Precipitation within sight, not reaching the ground or the surface of the sea.	Cloud covering more than 1/2 of the sky throughout the appropriate period.	Cloud covering more than 1/2 of the sky throughout the appropriate period.			No Stratocumulus, Stratus, Cumulus or Cumulonimbus.	90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas	1500-2000 4921-6562	Altostratus opacus or Nimbostratus.		71.0 44.1	-23.0 -9
	13	-11.7 11	597.9 23.54 797.13 797.13		1.2 0.05 1.6 1.6	27	Wind blowing from the west-northwest	Strong gale (21 m/s) (76 km/h) (47 miles/hour) (41 mile/hour) (9 Bft)			60%. 6/10. 5 oktas	Clouds generally forming or developing.	Fog or ice fog or thick haze.	Blizzard	-20.6 -5	-10.8 13	No Stratocumulus, Stratus, Cumulus or Cumulonimbus.	50%. 5/10. 4 oktas	2500 or more, or no clouds. 8202 or more, or no clouds.	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.	71.0 44.1	-26.9 -16
	10	-18.3 -1	596.7 23.49 795.53 795.53		3.6 0.14 4.8 4.8	67	Wind blowing from the north-west	Violent storm (32 m/s) (115 km/h) (72 mph) (62 knots) (11 Bft)			10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0	Clouds generally dissolving or becoming less developed.	Fog or ice fog or thick haze.	Blizzard			Stratus nebulosus or Stratus fractus other than of bad weather, or both.	50%. 5/10. 4 oktas		No Altocumulus, Altostratus or Nimbostratus.	Cirrus fibratus, sometimes uncinus, not progressively invading the sky.	71.0 44.1	-22.9 -9
	07	-20.3 -5	593.1 23.35 790.74 790.74		2.7 0.11 3.6 3.6	100	Wind blowing from the west-northwest	Hurricane (36 m/s) (130 km/h) (81 mile/hour) (70 knots) (12 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, depositing rime, sky invisible. Depth of newly fallen snow is 2 cm. 0.8 inches.	Snow and/or other types of solid precipitation	Fog or ice fog or thick haze.	-20.5 -5							0.1 0.06	-20.3 -5	2.0 0.08	6
	04	-16.7 2	590.4 23.24 787.14 787.14		1.9 0.07 2.53 2.53	100	Wind blowing from the west-northwest	Hurricane (37 m/s) (133 km/h) (83 mph) (72 knots) (12 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.	Continuous fall of snowflakes, slight at time of observation.	Snow and/or other types of solid precipitation	Fog or ice fog or thick haze.								0.1 0.06	-16.7 2