A:Answer The do very well in the cold. I live in Anchorage Alaska, and 2 of my cameras are outdoors, and the battery life is doing well and we have had a few weeks of Neg 10F. 3 of my indoor cameras show FULL after 2 months, and the 2 outdoor are showing about 2/3 Full. As far as High Humidity I don't know for sure, the humidity here says at about 70%.