So I keep all my animals in one room. They all have under tank heaters and I regulate them with individual Hydrofarm Jumpstart Thermostats. I know, on-off thermostats aren't exactly ideal but at the time they were the best option for me. Pretty soon I will be switching to a Herpstat. Anyway I just moved to a new area where it is A LOT colder than what I'm used to. The house reaches around 60 degrees at night, but I figured my animals were fine with their thermostats and hot spots. Nope. For some reason all of my thermostats aren't reaching the set temperatures. My Bp's hot spot is set to 93, but his digital thermometer is only reading around 85 on the hot spot, I also tested it with my temp gun (variable by about 6 degrees) and it read 83.

To put it simply, I'm wondering if cold ambient air temps are affecting the thermostats abilities to reach the set temp? And would a room heater help fix that problem?

Seems weird to me, I feel like they should be what I set them to no matter what. Which is why I'm planning on switching to Herpstat soon. I'm also wondering if my animals will be okay with the lowered temps for the next two weeks? I live way out in the middle of nowhere and currently without a vehicle. I'm going into town on the 22nd to pick up my new car and I was going to get a room heater then.

Overview- ambient temp at night: 60
ambient temp during day: 70-78
Hot spots: varying from 80-87