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 3, Monday | 15 | 17.0 63 | 728.4 28.68 971.12 971.12 | 762.1 30 1016.05 1016.05 | 46 | Wind blowing from the north | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 40%. 4/10. 3 oktas | Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level. | 40%. 4/10. 3 oktas | 2000-2500 6562-8202 | No Altocumulus, Altostratus or Nimbostratus. | No Cirrus, Cirrocumulus or Cirrostratus. | 71.0 44.1 | 5.3 42 | ||||||||||||||
09 | 9.3 49 | 729.8 28.73 972.99 972.99 | 764.5 30.1 1019.25 1019.25 | 71 | Wind blowing from the east-southeast | Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft) | 50%. 5/10. 4 oktas | -1.0 30 | 10.4 51 | Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level. | 10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0 | 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. | Cirrus uncinus or fibratus, or both, progressively invading the sky; they generally thicken as a whole. | 71.0 44.1 | 4.2 40 | No precipitation No precipitation | 1 | |||||||||||
| August 2, Sunday | 18 | 9.6 49 | 729.8 28.73 972.99 972.99 | 764.5 30.1 1019.25 1019.25 | 0.1 0 0.13 0.13 | 62 | Wind blowing from the north-northwest | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 60%. 6/10. 5 oktas | 7.1 45 | 11.3 52 | Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level. | 20–30%. 2/10–3/10. 2 oktas | 1500-2000 4921-6562 | 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. | Cirrocumulus alone, or Cirrocumulus accompanied by Cirrus or Cirrostratus or both, but Cirrocumulus is predominant. | 71.0 44.1 | 2.7 37 | |||||||||||
15 | 9.6 49 | 729.7 28.73 972.85 972.85 | 764.3 30.09 1018.98 1018.98 | 68 | Wind blowing from the north-northwest | 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. | 50%. 5/10. 4 oktas | 1000-1500 3281-4921 | Altocumulus translucidus at a single level. | Cirrocumulus alone, or Cirrocumulus accompanied by Cirrus or Cirrostratus or both, but Cirrocumulus is predominant. | 71.0 44.1 | 4.0 39 | |||||||||||||||