"rps" wrote in message
oups.com...
I understand from several postings in various threads here that the
best time to cross the Siskiyous comfortably is early or late in the
day.

1) What would be the best time to cross in the late afternoon or early
evening?


Flying early or late is less important in the fall (or winter/spring) as
there is less heating of the surface with all the associated thermals,
turbulence and wind changes. Here in ID during July and August, the window
for comfortable mountain flying is only a few hours each day but by November
you can fly any time during the day. In addition to the daily effect you
obviously have to consider the general weather that day (winds aloft,
moisture ect.).

2) Would it be okay to cross about 3 hours before sunset?

Yes.

3) What is the weather like between late September and early November?


Varies a lot! Could be cold clear and smooth or thunderstorms or a
blizzard!

Any IMC will almost certainly contain ice that time of year.

Mike
MU-2