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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 19, Friday | 17 | 2.2 36 | 628.5 24.74 837.93 837.93 | -0.4 -0.02 -0.53 -0.53 | 97 | Wind blowing from the north-east | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 20–30%. 2/10–3/10. 2 oktas | State of sky on the whole unchanged. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | 2.2 36 | 3.5 38 | Stratocumulus cumulogenitus. | 10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0 | 200-300 656-984 | Altocumulus translucidus at a single level. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | 1.7 35 | |||||||||
14 | 3.2 38 | 628.9 24.76 838.46 838.46 | -0.8 -0.03 -1.07 -1.07 | 86 | Wind blowing from the north-east | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 40%. 4/10. 3 oktas | State of sky on the whole unchanged. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | 2.5 37 | 3.5 38 | Stratocumulus cumulogenitus. | 10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0 | 200-300 656-984 | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | 1.1 34 | No precipitation No precipitation | 6 | ||||||||
11 | 3.1 38 | 629.7 24.79 839.53 839.53 | -0.2 -0.01 -0.27 -0.27 | 84 | Wind blowing from the north-east | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 40%. 4/10. 3 oktas | State of sky on the whole unchanged. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | 2.5 37 | 3.2 38 | Cumulus humilis or Cumulus 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 | 0.7 33 | |||||||||||
08 | 2.7 37 | 629.9 24.8 839.8 839.8 | -0.3 -0.01 -0.4 -0.4 | 86 | Wind blowing from the north-northeast | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 20–30%. 2/10–3/10. 2 oktas | State of sky on the whole unchanged. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | 2.5 37 | 4.1 39 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | 0.6 33 | No precipitation No precipitation | 12 | ||||||||
05 | 3.0 37 | 630.2 24.81 840.2 840.2 | -0.6 -0.02 -0.8 -0.8 | 83 | Calm, no wind | Calm | 20–30%. 2/10–3/10. 2 oktas | State of sky on the whole unchanged. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | 2.8 37 | 4.1 39 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | 0.3 33 | ||||||||||
02 | 3.6 38 | 630.8 24.83 841 841 | -0.2 -0.01 -0.27 -0.27 | 78 | Calm, no wind | Calm | 20–30%. 2/10–3/10. 2 oktas | State of sky on the whole unchanged. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | 2.8 37 | 4.1 39 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | 0.1 32 | No precipitation No precipitation | 6 | ||||||||
| December 18, Thursday | 23 | 3.2 38 | 631.0 24.84 841.26 841.26 | 0.2 0.01 0.27 0.27 | 82 | Wind blowing from the north-east | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 50%. 5/10. 4 oktas | State of sky on the whole unchanged. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | Cloud covering 1/2 or less of the sky throughout the appropriate period. | 2.8 37 | 4.0 39 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | 0.3 33 | |||||||||
20 | 3.1 38 | 630.8 24.83 841 841 | 0.0 0 0 0 | 76 | Wind blowing from the north-east | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 40%. 4/10. 3 oktas | Clouds generally dissolving or becoming less developed. | 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. | 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. | 3.1 38 | 8.9 48 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 71.0 44.1 | -0.7 31 | No precipitation No precipitation | 12 | ||||||||
17 | 4.4 40 | 630.8 24.83 841 841 | 0.1 0 0.13 0.13 | 79 | Wind blowing from the north | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | State of sky on the whole unchanged. | 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. | 4.3 40 | 8.9 48 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 20–30%. 2/10–3/10. 2 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; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered. | 71.0 44.1 | 1.1 34 | ||||||||||