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 9, Tuesday | 10 | -18.9 -2 | 596.8 23.5 795.67 795.67 | 0.2 0.01 0.27 0.27 | 20 | Wind blowing from the west-northwest | Near gale (15 m/s) (54 km/h) (34 mph) (29 knots) (7 Bft) | 20–30%. 2/10–3/10. 2 oktas | Stratus nebulosus or Stratus 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 | 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. | 71.0 44.1 | -36.3 -33 | |||||||||||||||
07 | -22.5 -9 | 596.6 23.49 795.4 795.4 | 0.5 0.02 0.67 0.67 | 20 | Wind blowing from the west-northwest | Strong gale (22 m/s) (79 km/h) (49 miles/hour) (43 knots) (9 Bft) | 40%. 4/10. 3 oktas | -25.3 -14 | -18.2 -1 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0 | 2000-2500 6562-8202 | Altostratus translucidus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | -39.3 -39 | |||||||||||||
04 | -22.3 -8 | 596.1 23.47 794.73 794.73 | -0.2 -0.01 -0.27 -0.27 | 24 | Wind blowing from the west-northwest | Strong gale (22 m/s) (79 km/h) (49 miles/hour) (43 knots) (9 Bft) | 20–30%. 2/10–3/10. 2 oktas | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0 | 2500 or more, or no clouds. 8202 or more, or no clouds. | Altostratus translucidus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | -37.2 -35 | |||||||||||||||
01 | -22.7 -9 | 596.3 23.48 795 795 | -0.2 -0.01 -0.27 -0.27 | 22 | Wind blowing from the west-northwest | Gale (18 m/s) (65 km/h) (40 miles/hour) (35 knots) (8 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. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | -27.7 -18 | -18.2 -1 | Stratus nebulosus or Stratus 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 | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | -38.4 -37 | |||||||||||
| December 8, Monday | 22 | -25.2 -13 | 596.5 23.48 795.27 795.27 | -0.3 -0.01 -0.4 -0.4 | 51 | Wind blowing from the west-northwest | Gale (19 m/s) (68 km/h) (43 mph) (37 knots) (8 Bft) | 20–30%. 2/10–3/10. 2 oktas | Clouds generally dissolving or becoming less developed. | Fog or ice fog or thick haze. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Stratus nebulosus or Stratus 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 | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | -32.4 -26 | ||||||||||||
19 | -25.3 -14 | 596.8 23.5 795.67 795.67 | 0.1 0 0.13 0.13 | 97 | Wind blowing from the north-west | Strong gale (21 m/s) (76 km/h) (47 miles/hour) (41 mile/hour) (9 Bft) | 40%. 4/10. 3 oktas | Fog or ice fog in patches. | Fog or ice fog or thick haze. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | -27.7 -18 | -22.8 -9 | Stratus nebulosus or Stratus fractus other than of bad weather, or both. | 20–30%. 2/10–3/10. 2 oktas | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | -25.6 -14 | |||||||||||
16 | -23.3 -10 | 596.7 23.49 795.53 795.53 | 0.7 0.03 0.93 0.93 | 49 | Wind blowing from the north-west | Strong gale (21 m/s) (76 km/h) (47 miles/hour) (41 mile/hour) (9 Bft) | 40%. 4/10. 3 oktas | Fog or ice fog. | Fog or ice fog or thick haze. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Stratocumulus other than Stratocumulus cumulogenitus. | 40%. 4/10. 3 oktas | No Altocumulus, Altostratus or Nimbostratus. | Cirrus uncinus or fibratus, or both, progressively invading the sky; they generally thicken as a whole. | 71.0 44.1 | -31.0 -24 | |||||||||||||
13 | -23.4 -10 | 596.0 23.46 794.6 794.6 | 0.8 0.03 1.07 1.07 | 86 | Wind blowing from the north-west | Storm (27 m/s) (97 km/h) (60 miles/hour) (52 knots) (10 Bft) | 20–30%. 2/10–3/10. 2 oktas | Clouds generally forming or developing. | Fog or ice fog or thick haze. | Blizzard | -27.7 -18 | -18.2 -1 | Stratocumulus other than Stratocumulus cumulogenitus. | 50%. 5/10. 4 oktas | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | -25.1 -13 | |||||||||||
10 | -27.7 -18 | 595.2 23.43 793.53 793.53 | 2.1 0.08 2.8 2.8 | 81 | Wind blowing from the north-west | Violent storm (30 m/s) (108 km/h) (67 miles/hour) (58 knots) (11 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 become thinner during the preceding hour). | Fog or ice fog or thick haze. | Blizzard | Stratocumulus other than Stratocumulus cumulogenitus. | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | Less than 50 Less than 50 | No Altocumulus, Altostratus or Nimbostratus. | No Cirrus, Cirrocumulus or Cirrostratus. | 0.1 0.06 | -29.9 -22 | ||||||||||||