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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 | 21 | -41.6 -43 | 747.5 29.43 996.58 996.58 | 769.6 30.3 1026.05 1026.05 | -1.1 -0.04 -1.47 -1.47 | 66 | Calm, no wind | Calm | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | State of sky on the whole unchanged. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | -34.9 -31 | 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. | 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. | 20.0 12.4 | -45.4 -50 | 0.2 0.01 | 12 | |||||||
18 | -39.0 -38 | 748.6 29.47 998.05 998.05 | 770.4 30.33 1027.12 1027.12 | 0.0 0 0 0 | 67 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 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. | Altostratus opacus or Nimbostratus. | Cirrostratus covering the whole sky. | 10.0 6.2 | -42.7 -45 | |||||||||||
15 | -35.2 -31 | 748.6 29.47 998.05 998.05 | 770.1 30.32 1026.72 1026.72 | -1.2 -0.05 -1.6 -1.6 | 70 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 60%. 6/10. 5 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 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. | Cirrostratus covering the whole sky. | 10.0 6.2 | -38.7 -38 | |||||||||||
12 | -37.8 -36 | 749.8 29.52 999.65 999.65 | 771.4 30.37 1028.45 1028.45 | -0.6 -0.02 -0.8 -0.8 | 68 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | State of sky on the whole unchanged. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 40%. 4/10. 3 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | Altostratus translucidus. | Cirrostratus covering the whole sky. | 50.0 31.1 | -41.5 -43 | |||||||||||
09 | -38.8 -38 | 750.4 29.54 1000.45 1000.45 | 772.3 30.41 1029.65 1029.65 | -0.4 -0.02 -0.53 -0.53 | 67 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | -41.7 -43 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 40%. 4/10. 3 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 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. | Cirrostratus covering the whole sky. | 10.0 6.2 | -42.6 -45 | 0.3 0.01 | 12 | Even layer of loose dry snow covering ground completely. | 33 13 | ||||||
06 | -38.9 -38 | 750.8 29.56 1000.98 1000.98 | 772.6 30.42 1030.05 1030.05 | -0.8 -0.03 -1.07 -1.07 | 67 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 60%. 6/10. 5 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 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. | Cirrostratus covering the whole sky. | 10.0 6.2 | -42.6 -45 | |||||||||||
03 | -40.1 -40 | 751.6 29.59 1002.05 1002.05 | 773.6 30.46 1031.38 1031.38 | -0.6 -0.02 -0.8 -0.8 | 67 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 40%. 4/10. 3 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 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. | Cirrostratus covering the whole sky. | 10.0 6.2 | -43.8 -47 | |||||||||||
00 | -38.7 -38 | 752.2 29.61 1002.85 1002.85 | 774.1 30.48 1032.05 1032.05 | 0.0 0 0 0 | 67 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | Snow and/or other types of solid precipitation | Cloud covering more than 1/2 of the sky throughout the appropriate period. | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 60%. 6/10. 5 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 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. | Cirrostratus covering the whole sky. | 10.0 6.2 | -42.4 -44 | |||||||||||
| December 20, Saturday | 21 | -39.8 -40 | 752.2 29.61 1002.85 1002.85 | 774.2 30.48 1032.18 1032.18 | -0.4 -0.02 -0.53 -0.53 | 67 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Intermittent fall of snowflakes, moderate at time of observation. | Snow and/or other types of solid precipitation | 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. | -32.2 -26 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 40%. 4/10. 3 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | Altostratus opacus or Nimbostratus. | Cirrostratus covering the whole sky. | 10.0 6.2 | -43.5 -46 | 0.6 0.02 | 12 | |||||||