Thanks Przemek, for some actual humidity data!

Where I keep my bees in the Calif foothills, we often often get extended
rain during winter and spring, for days or weeks at a time.  Thus, my
colonies experience high relative humidity at cool, above-freezing temps.
But so long as the hives are tipped forward so as not to allow water to
pool on the bottom board, we see little mold on the combs, and don't notice
colony stress.  My hives are in doubles, no top ventilation, 3/4" high
full-width entrances, uninsulated.

So what's the difference?  Why are others having such moisture problems?
Isn't your RH low in areas where it freezes, or is that only where it
freezes hard?

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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