Weather archive in Katunayake / Bandaranaike (airport)
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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 April 28, Monday | 11:30 | 30.6 87 | 756.2 29.77 1008.18 1008.18 | 757.1 29.81 1009.38 1009.38 | 76 | Wind blowing from the south-west | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | Clouds generally forming or developing. | 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. | Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level. | 60%. 6/10. 5 oktas | 300-600 984-1968 | No Altocumulus, Altostratus or Nimbostratus. | Cirrus spissatus, in patches or entangled sheaves, which usually do not increase and sometimes seem to be the remains of the upper part of a Cumulonimbus; or Cirrus castellanus or floccus. | 20.0 12.4 | 25.8 78 | No precipitation No precipitation | 9 | |||||||||
05:30 | 25.6 78 | 755.9 29.76 1007.78 1007.78 | 756.8 29.8 1008.98 1008.98 | 95 | Wind blowing from the east | Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft) | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | Thunderstorm, but no precipitation at the time of observation. | Thunderstorm(s) with or without precipitation. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | Cumulus humilis or Cumulus fractus other than of bad weather, or both. | 50%. 5/10. 4 oktas | 300-600 984-1968 | No Altocumulus, 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. | 7.0 4.4 | 24.7 76 | No precipitation No precipitation | 9 | ||||||||||
| April 27, Sunday | 23:30 | 26.6 80 | 757.2 29.81 1009.52 1009.52 | 758.1 29.85 1010.72 1010.72 | 0.6 0.02 0.8 0.8 | 89 | Wind blowing from the north-northeast | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 40%. 4/10. 3 oktas | Lightning visible, no thunder heard. | 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 1/2 or less of the sky throughout the appropriate period. | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 40%. 4/10. 3 oktas | 300-600 984-1968 | No Altocumulus, Altostratus or Nimbostratus. | No Cirrus, Cirrocumulus or Cirrostratus. | 10.0 6.2 | 24.7 76 | No precipitation No precipitation | 9 | ||||||||
20:30 | 28.6 83 | 756.6 29.79 1008.72 1008.72 | 757.5 29.82 1009.92 1009.92 | 87 | Wind blowing from the east | Calm | 70 – 80%. 7/10 – 8/10. 6 oktas | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 50%. 5/10. 4 oktas | 300-600 984-1968 | No Altocumulus, Altostratus or Nimbostratus. | No Cirrus, Cirrocumulus or Cirrostratus. | 20.0 12.4 | 26.3 79 | No precipitation No precipitation | 9 | |||||||||||||
17:30 | 31.0 88 | 755.1 29.73 1006.72 1006.72 | 756.0 29.76 1007.92 1007.92 | 72 | Wind blowing from the west-southwest | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | Clouds generally forming or developing. | Thunderstorm(s) with or without precipitation. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 28.0 82 | 32.1 90 | Cumulus humilis or Cumulus fractus other than of bad weather, or both. | 50%. 5/10. 4 oktas | 300-600 984-1968 | Altocumulus cumulogenitus (or cumulonimbogenitus). | No Cirrus, Cirrocumulus or Cirrostratus. | 20.0 12.4 | 25.4 78 | No precipitation No precipitation | 9 | ||||||||
11:30 | 29.7 85 | 757.6 29.83 1010.05 1010.05 | 758.5 29.86 1011.25 1011.25 | 0.1 0 0.13 0.13 | 75 | Wind blowing from the south-southwest | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 100%. 10/10. 8 oktas | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 40%. 4/10. 3 oktas | 300-600 984-1968 | No Altocumulus, Altostratus or Nimbostratus. | No Cirrus, Cirrocumulus or Cirrostratus. | 20.0 12.4 | 24.9 77 | No precipitation No precipitation | 9 | ||||||||||||