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 19, Wednesday | 14 | 11.8 53 | 605.3 23.83 807 807 | -0.4 -0.02 -0.53 -0.53 | 87 | Wind blowing from the south-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 in patches. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 8.8 48 | 12.8 55 | 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 | 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; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered. | 2.0 1.2 | 9.7 49 | ||||||||||
11 | 12.6 55 | 605.7 23.85 807.53 807.53 | 84 | Wind blowing from the south-southwest | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 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. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 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 | Altostratus opacus 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. | 1.6 1.0 | 9.9 50 | ||||||||||||||
08 | 9.8 50 | 605.7 23.85 807.53 807.53 | 98 | Wind blowing from the south-west | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 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. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 8.8 48 | 13.9 57 | Stratus nebulosus or Stratus fractus other than of bad weather, or both. | 70 – 80%. 7/10 – 8/10. 6 oktas | Less than 50 Less than 50 | 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 fibratus, sometimes uncinus, not progressively invading the sky. | 0.2 0.1 | 9.5 49 | |||||||||||
05 | 9.8 50 | 605.7 23.85 807.53 807.53 | -0.1 -0 -0.13 -0.13 | 98 | Wind blowing from the south-west | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 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. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 8.8 48 | Stratus nebulosus or Stratus fractus other than of bad weather, or both. | 70 – 80%. 7/10 – 8/10. 6 oktas | Less than 50 Less than 50 | 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 fibratus, sometimes uncinus, not progressively invading the sky. | 0.2 0.1 | 9.5 49 | |||||||||||
02 | 9.3 49 | 605.8 23.85 807.67 807.67 | 100 | Wind blowing from the west | 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, has begun or has become thicker during the preceding hour. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 9.3 49 | 13.9 57 | 0.1 0.06 | 9.3 49 | ||||||||||||||||
| August 18, Tuesday | 23 | 9.9 50 | 606.5 23.88 808.6 808.6 | 0.2 0.01 0.27 0.27 | 93 | Wind blowing from the west | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 100%. 10/10. 8 oktas | Fog or ice fog. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 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 | Altocumulus translucidus in bands, or one or more layers of Altocumulus translucidus or opacus, progressively invading the sky; these Altocumulus clouds generally thicken as a whole. | 71.0 44.1 | 8.8 48 | |||||||||||||
20 | 10.2 50 | 606.3 23.87 808.33 808.33 | 0.0 0 0 0 | 98 | 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, has begun or has become thicker during the preceding hour. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 9.5 49 | 13.9 57 | 0.1 0.06 | 9.9 50 | |||||||||||||||
17 | 10.7 51 | 606.3 23.87 808.33 808.33 | 0.2 0.01 0.27 0.27 | 97 | Wind blowing from the west-northwest | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 100%. 10/10. 8 oktas | Fog or ice fog, sky visible, has begun or has become thicker during the preceding hour. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | Stratocumulus cumulogenitus. | 100%. 10/10. 8 oktas | 0.2 0.1 | 10.3 51 | |||||||||||||||
14 | 13.5 56 | 606.1 23.86 808.07 808.07 | -0.1 -0 -0.13 -0.13 | 81 | Wind blowing from the west-northwest | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 100%. 10/10. 8 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. | 9.5 49 | 13.9 57 | Stratocumulus cumulogenitus. | 100%. 10/10. 8 oktas | 0.8 0.5 | 10.3 51 | |||||||||||||