Yes... something is wrong with sunshine data. Go to comparison tool and look at Miami and Key West. They're only 100 miles away and Miami shows significantly less sunshine... and shows very low overall sunshine which is clearly wrong.
Though I should point out there are definitely weird things with the raw NSA data. For instance, their precipitation data at one and 6 hour increments do not match at all.
Had to check that: it is NOAA data (http://www.ncdc.noaa.gov/oa/climate/isd/), not NSA data. The NSA tries hard to be a one way street; it reads a lot, but does not publish much.
