Totally overcast days in summer months. How often do they occur where you live? (records, seasons)
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Yeah, getting completely sunny days is a hard task here. On our sunniest days, cloud will almost always bubble up around midday, and sometimes will obscure the sun for an hour or two before clearing later in the afternoon. For completely sunny/cloudless days here, your best bet is outside summer, when the sun is weaker so lass surface-based heating occurs.
That's the difference from here, as usually clouds starts to form during the evening, and many times there is cloud cover only when the sun sets. Morning clouds happen, but often clear before 8am, if the sunrise is at 5am or so.
Getting completely sunny days in mid September and October are increasingly rare, and almost impossible until late January, but starting to appear in February and March. This March despite being frigid, had almost eternal sunshine: Synop report summary
Location: Segovia, central Spain, 1230 m asl, Csb Mediterranean with strong continental influence, 40º43 N
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Are they more frequent in such places like Ireland, Scotland, Iceland or Norway?
I had always thought that those places could get more summer cloudiness than for instance southern England, northern France or Benelux.
Are they more frequent in such places like Ireland, Scotland, Iceland or Norway?
I had always thought that those places could get more summer cloudiness than for instance southern England, northern France or Benelux.
Am I on the right track?
Yes you are. The semi-permanent low pressure system near Iceland forms cloudy conditions, and strong winds around it pushes clouds to Scotland and the Norwegian coast. Cities like Bergen get 500 hours less sun annually than Oslo on the other side of the Scandinavian mountains, and 700 hours less than Stockholm.
This spring the other half of the low system at the Labrador Sea was particularly strong, and brought frequently cool and cloudy weather all the way to the UK.
Got a detailed breakdown of August and September sunshine from the FMI, could share them to give a hint of sunny/cloudy conditions.
August,
days with zero sunshine: 3
days with less than 5 hours: 5
days with more than 10 hours: 17
max sunshine in a day: 15.2 hours (6th), 92.1% of possible daylight.
max percentage of possible sunshine: 96.2% (25th)
September,
days with zero sunshine: 2
days with less than 5 hours: 14
days with more than 10 hours: 7
max sunshine in a day: 12.9 hours (8th), 95.6% of possible daylight.
I live far enough inland that cloudy days in the summer are exceedingly rare. Though apparently the first part of August here was unusually cloudy and windy (I was out of state.) The monthly high was 8 F below normal that month. :O
Are they more frequent in such places like Ireland, Scotland, Iceland or Norway?
I had always thought that those places could get more summer cloudiness than for instance southern England, northern France or Benelux.
Am I on the right track?
They could also be more frequent in places where sunshine percentages differ little over the year, or in coastal regions.
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