Read this post and grabbed a RF off the table by the back door too see, it's a cold, wet, misty, foggy day here as well, just ranged 710 yards up on the mountain, all the way up to low fog level in the trees, everything else visible in the pasture all the way back to 25 yards flashed a reading.
The Nikon Black RangeX is what I used, don't know what they cost, don't figure they're too expensive, an old Bud gave me that one over six months ago.
It's not the laser travelling through the cold air that's the problem, but the RF unit itself getting cold.
JG,
This may or may not be helpful, but I've never seen a RF that worked more reliably in all conditions that my old Bushnell Fusion 1600.
