Quote Originally Posted by Ole View Post
Sunny 11-ish here in Norway, and and I was surprised to find that it was sunny 22 in Eritrea whan I was there many years ago. But 2000 m altitude near equator IS different from sea level at 60 degrees north.
At 60 degrees North you rarely see the sun at a height above 45 on the horizon which is the condition in the Sunny 16 rule properly enunciated. I guess the "Sunny 16 rule" is mostly not applicable at those latitudes. Height on sea level is probably not a factor.

A program, Planetarium, in my Palm says that the Sun in Oslo at astronomical noon is 52 on the equinox. That's the maximum height the sun can reach in Oslo (noon of the equinox). So the rule can still apply in Oslo, but not very often... actually almost never!