Winter horizontal low stratus and fog around the world

[theunbrainwashed]

Originally Posted by nei

That's a bit of an exaggeration. Checking the NOAA skycover reports a skycover of 70-80% for Pittsburgh in the winter.

National Weather Service Climate

[choose Preliminary Monthly Climate Data (CF6)]

Still maybe the cloudiest place in the eastern US, except for maybe a few sites adjacent to Lake Ontario/Erie or a spot in northern New England next to a mountain.

Thanks for that link. My 90%-99% cloudiness went off the fact that Wunderground doesn't have that exact data, they only list a descriptor. What did you click on to see the data, by the way? Looking around Monthly Data Summary and I don't see that percetage

[Full Overcast]

According to long term data from the BOM, Melbourne suffers an average cloud cover (9am and 3pm obs averaged) of 5.6 oktas in May, 5.7 in June, 5.4 in August, 5.5 in September and 5.3 in October.

Doing the math, that is an average sky cover of 70% in May, 72% in June, 68% in August, 69% in September and 66% in October.

Officially, there are 180 "cloudy" days annually. The BOM defines a cloudy day as the mean of the 9am/3pm sky cover equal to or greater than 6 oktas (75%).

[Humid Subtropical]

Stratus cloud cover in southern Ontario might resemble parts of northern Italy. Similar day length and sunshine hours.

[dunno what to put here]

Getting an entire week of no sun would be really unusual here, but getting a week-long stretch of almost sunless weather wouldn't be too unusual.