Danno, I have both NWC and italians, today its cool , lol your so close to me our temps are pretty similar. but my bees are out at 10am this morning, and the carni's well there always out, rain or shine. the dark bodies must hold heat better, don't know, but ya they work in lots worse weather. so I guess its normal. you must have something else in there , carni cross or maybe a feral cross, I know I got a split that I let naturally make a queen, from a hive that swarmed and left many queen cells, I think she mated with feral due to the majority of new bees that are dark or almost black. Ferals would work every opportunity they can.