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But there is no logic in that, you've enjoyed 6 hours of sunshine, now who cares about the rest of the day, whether it is cloudy or dark.
San Francisco for example, has a 91% chance of being sunny in July, but is only sunny 70% of the time during daylight hours.
Because I'm not worried about how many hours of sun there are, but whether the day is mostly sunny, or mostly cloudy. 6 hours of sunlight out of a 16 hour day, isn't much, and would be depressing to me as a long term average.
If your using hours of darkness in S.F's percentages, then it's meaningless to me -although I accept that how cloudy a place is at night, is important to you.
But there is no logic in that, there is 24 hours of daylight, therefore 25% sun is a high amount. Percent sun doesn't reflect the chance of sunny conditions, so why would you be bothered about it?
Percent sun also rates climates by latitude, which I thought you didn't like doing.
San Francisco for example, has a 91% chance of being clear in July, but is only sunny 70% of the time during daylight hours.
Not sure what you mean by percent sun also rates climates by latitude. Rating climates by latitude is fine, but when comparing to other climates, then latitude isn't particularly relevant.
Because I'm not worried about how many hours of sun there are, but whether the day is mostly sunny, or mostly cloudy. 6 hours of sunlight out of a 16 hour day, isn't much, and would be depressing to me as a long term average.
If your using hours of darkness in S.F's percentages, then it's meaningless to me -although I accept that how cloudy a place is at night, is important to you.
Why are sun hours not important? You can't say a place is sunny if it has 2 hours of sunshine per day just because that's 90% of daylight hours. It's rating climate by latitude, which is like saying New Zealand has cold summers, but only for the latitude.
Not sure what you mean by percent sun also rates climates by latitude. Rating climates by latitude is fine, but when comparing to other climates, then latitude isn't particularly relevant.
It rates climates by latitude, because having 6 hours of sun is not good for the latitude.
You can't compare sun totals with distances. Geography of the land affects totals more. I trust the estimates of talented meteorologists over yours. The sun hours are 1921 hours at Bognor, likely increasing along the beach towards Selsey, reaching a maximum amount at the southernmost point, and then decreasing on the western side of that. Also, you cannot compare Southsea to the others as it is based on a different climate period and is likely duller.
You cannot guess Unalaska's sunshine for example.
Erm yes, yes you can That stretch of coast from Portsmouth to Bognor is all flat. And yes the Southsea figures are based on a different 30 year period (the last 30 years the station was open) but it isn't going to be much different, as it isn't far away & as I have said is on flat land. Also you only have to look at the sunshine data from Thorney Island & Southampton to see that it does decrease with distance. Also what you say makes absolutely no sense as Shanklin also only has marginally more hours than Bognor & that is further south still than Selsey...
I would trust actual recorded data over estimated maps & I wouldn't trust anything you have to say as you clearly have very little knowledge about meteorology, which shows in every single post you make.
Why are sun hours not important? You can't say a place is sunny if it has 2 hours of sunshine per day just because that's 90% of daylight hours. It's rating climate by latitude, which is like saying New Zealand has cold summers, but only for the latitude.
I would say the days are sunny if they record 90% of sunshine. If the sun isn't above the horizon, then it doesn't count.
That's fine to say NZ has cold summers for the latitude, but that doesn't mean much when comparing to other climates at other latitudes -The UK might have warm winters for the latitude, but I still think they aren't nice winters.
I would say the days are sunny if they record 90% of sunshine. If the sun isn't above the horizon, then it doesn't count.
That's fine to say NZ has cold summers for the latitude, but that doesn't mean much when comparing to other climates at other latitudes -The UK might have warm winters for the latitude, but I still think they aren't nice winters.
See that's why it's silly because it doesn't count if the sun is not above the horizon. To say that 2 hours is sunny and then 6 hours is not, is completely inconsistent.
I can't see why you haven't seen the point already and at this point I'm getting fed up so I'm going to use an extreme example - The North and South Poles both record 100% of maximum possible sunshine during their winters, and supposedly you think this is sunny.
1st time to SFO in August. Was freezing cold, maybe 57 degrees and grey.
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That stretch of coast from Portsmouth to Bognor is all flat. And yes the Southsea figures are based on a different 30 year period (the last 30 years the station was open) but it isn't going to be much different, as it isn't far away & as I have said is on flat land. Also you only have to look at the sunshine data from Thorney Island & Southampton to see that it does decrease with distance. Also what you say makes absolutely no sense as Shanklin also only has marginally more hours than Bognor & that is further south still than Selsey... 
