[Cob] Too late for cob this fall?

[Rob Hoisington]

Hi, I'm a first time cob hutter (Hutterite?) who's just about finished with
the foundation (rock dug from our yard and Portland cement, sand, and lime)
of my 9 foot diameter cob hut in our backyard outside of Oregon City. It's a
project that my family and I are taking our time on, but I'm wondering if I
should wait until next spring to begin the cob walls. Will it soon become
too cold and wet for me to work slowly on the walls, or is it still possible
to work through the fall, keeping it covered? I plan on building a curved,
arch roof with old cedar shakes that I have access to. Thanks for any
experience or insight you have.

Rob Hoisington