Weather archive in Grimsstadir
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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 21, Friday | 21 | 12.7 55 | 723.8 28.5 964.99 964.99 | 757.8 29.83 1010.32 1010.32 | 71 | 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 | Stratocumulus cumulogenitus. | 40%. 4/10. 3 oktas | 1000-1500 3281-4921 | Patches (often lenticular) of Altocumulus translucidus, continually changing and occurring at one or more levels. | 70.0 43.5 | 7.6 46 | |||||||||||||||
18 | 15.7 60 | 724.0 28.5 965.25 965.25 | 757.6 29.83 1010.05 1010.05 | 0.2 0.01 0.27 0.27 | 53 | 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 | 8.9 48 | 19.7 67 | 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. | Patches (often lenticular) of Altocumulus translucidus, continually changing and occurring at one or more levels. | Cirrostratus not progressively invading the sky and not entirely covering it. | 71.0 44.1 | 6.2 43 | ||||||||||||
15 | 19.4 67 | 723.8 28.5 964.99 964.99 | 757.0 29.8 1009.25 1009.25 | 36 | Wind blowing from the west | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 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. | Cirrostratus not progressively invading the sky and not entirely covering it. | 71.0 44.1 | 3.8 39 | |||||||||||||||
09 | 10.0 50 | 725.7 28.57 967.52 967.52 | 760.1 29.93 1013.38 1013.38 | 76 | Wind blowing from the south | Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 14.6 58 | 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 | 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. | 71.0 44.1 | 6.0 43 | 0.2 0.01 | 15 | ||||||||||||