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Old 10-07-2013, 10:22 AM
 
Location: Buxton UK
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Almost never - despite the very dullness of our summers it is almost unheard of to have a day with 0 sunshine. In fact, to the point where it is statistically meaningless and irrelevant.

For example, in the period 2009-2013 we get:

June: 4.5 sunless days.
July: 3.3 sunless days.
August: 2.8 sunless days.

This is despite the fact that June is overwhelmingly the sunniest month of the summer, and August by far the dullest. So, a pointless statistic. Best stick to sunshine hours.
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Old 10-07-2013, 11:53 AM
 
Location: Estonia
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Not nearly often enough. Cloudy summer days are my favorite but with June averaging 300 hours of sunshine, they're not that common.
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Old 10-07-2013, 12:17 PM
 
Location: Yorkshire, England
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If we're talking completely overcast summer days, I wonder if anywhere (and I mean anywhere at all, never mind a decent-sized city!) can beat Edinburgh's run in early July 2012? To put it into some sort of context, Edinburgh has about 17.5 hours of daylight at that time of year, so this spell as a whole was roughly 99% overcast.

PS - look at that diurnal range on the 7th!

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Old 10-07-2013, 12:29 PM
 
Location: Mid Atlantic USA
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Quote:
Originally Posted by ben86 View Post
If we're talking completely overcast summer days, I wonder if anywhere (and I mean anywhere at all, never mind a decent-sized city!) can beat Edinburgh's run in early July 2012? To put it into some sort of context, Edinburgh has about 17.5 hours of daylight at that time of year, so this spell as a whole was roughly 99% overcast.

PS - look at that diurnal range on the 7th!

Oh yuck! Can you imagine how god awful a July day would be that didn't budge from 56F and was cloudy all day. Scotland has an awful climate.
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Old 10-07-2013, 12:37 PM
 
Location: Yorkshire, England
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Quote:
Originally Posted by tom77falcons View Post
Oh yuck! Can you imagine how god awful a July day would be that didn't budge from 56F and was cloudy all day. Scotland has an awful climate.
I'd be curious to know what was the coldest summer weather ever recorded for various Scottish towns/cities. I'd imagine more or less everywhere in Scotland has had June days not break 10C (as happened in a lot of northern English sites on 3 June 2012), but I wouldn't be so sure for July and August.
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Old 10-07-2013, 03:10 PM
nei nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

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Location: Western Massachusetts
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Quote:
Originally Posted by ben86 View Post
If we're talking completely overcast summer days, I wonder if anywhere (and I mean anywhere at all, never mind a decent-sized city!) can beat Edinburgh's run in early July 2012? To put it into some sort of context, Edinburgh has about 17.5 hours of daylight at that time of year, so this spell as a whole was roughly 99% overcast.

PS - look at that diurnal range on the 7th!
try Juneau the same month in July 2012:

http://www.wunderground.com/history/...q_statename=NA

first half of July appears sunless.
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Old 10-07-2013, 03:13 PM
nei nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

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Location: Western Massachusetts
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Quote:
Originally Posted by tom77falcons View Post
Oh yuck! Can you imagine how god awful a July day would be that didn't budge from 56F and was cloudy all day. Scotland has an awful climate.
plenty on coastal California, including down to San Francisco. Arcata this july:

Weather History for Arcata, CA | Weather Underground

But this October has been sunny averaging a high of 71°F in Arcata.
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Old 10-07-2013, 03:19 PM
 
Location: Finland
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Sam. 7 13.1 °c 11.8 °c 24.4 mm 0 h
Dim. 8 15.4 °c 11 °c 0 mm 0.1 h
Lun. 9 13.7 °c 10.6 °c 0.6 mm 0 h
Mar. 10 12.1 °c 9.9 °c 7.4 mm 0 h
Mer. 11 13.5 °c 9.4 °c 1.8 mm 0.1 h
Jeu. 12 13.2 °c 9.1 °c 1.2 mm 0.1 h
Ven. 13 12.8 °c 8.8 °c 1.6 mm 0 h

Aberdeen last July. Pretty deep sh*t.
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Old 10-07-2013, 04:00 PM
 
Location: Yorkshire, England
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If July were a 30-day month, Aberdeen would not even have broken 60 hours in 2012 - bad beyond belief, even compared to their June 2012 with only 80.8 hours. Still, the month 'only' had eight sunless days. (One climate oddity, particularly considering how far north Aberdeen is, is that June and July 2012 both failed to beat January 2012's 83.3 hours, and March 2012's 163.9 hours beat both that year's midsummer months put together.)

Meteociel - Climatologie mensuelle de Aberdeen (UK)
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Old 10-07-2013, 05:17 PM
nei nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

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Location: Western Massachusetts
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I think Southeast Alaska competes "well".
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