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 | |
| 2025 August 30, Saturday | 09 | 8.7 48 | 716.2 28.2 954.86 954.86 | 750.3 29.54 1000.32 1000.32 | 90 | Wind blowing from the south-east | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 100%. 10/10. 8 oktas | Rain, not freezing, intermittent, slight at time of observation. | Rain. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 7.9 46 | 12.9 55 | Cumulonimbus calvus, with or without Cumulus, Stratocumulus or Stratus. | 100%. 10/10. 8 oktas | 200-300 656-984 | 15.0 9.3 | 7.2 45 | 5.0 0.2 | 15 | |||||||||
| August 29, Friday | 21 | 10.3 51 | 716.2 28.2 954.86 954.86 | 750.1 29.53 1000.05 1000.05 | 88 | Wind blowing from the south-east | 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 | Stratus nebulosus or Stratus fractus other than of bad weather, or both. | 20–30%. 2/10–3/10. 2 oktas | 300-600 984-1968 | Patches (often lenticular) of Altocumulus translucidus, continually changing and occurring at one or more levels. | No Cirrus, Cirrocumulus or Cirrostratus. | 50.0 31.1 | 8.4 47 | ||||||||||||||
15 | 13.2 56 | 716.2 28.2 954.86 954.86 | 749.8 29.52 999.65 999.65 | 83 | Wind blowing from the south | 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 | Shower(s) of rain. | Rain. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | Stratocumulus cumulogenitus. | 50%. 5/10. 4 oktas | 300-600 984-1968 | 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. | 50.0 31.1 | 10.4 51 | ||||||||||||
09 | 9.7 49 | 716.4 28.2 955.12 955.12 | 750.4 29.54 1000.45 1000.45 | 90 | Wind blowing from the north-northwest | 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 | 14.4 58 | Stratocumulus cumulogenitus. | 60%. 6/10. 5 oktas | 300-600 984-1968 | 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. | 60.0 37.3 | 8.1 47 | ||||||||||||||