Yes I agree, I would see what it's like before you go to bed! During the day shouldn't be a concern now.Agree with cpayne but just to add that it is the overnight temperatures that are most likely to vary the most.
Yeah Ill check the nighttime temperatures. at the moment the shed is warmer than the outhouse xx
As others have said it's still pretty cold especially at night. If you're not already doing so, can you put them outside for a bit in the day to get them a bit more used to it? My house is always very warm but my bunnies really enjoy playing outside, I leave the door open a tiny bit so they can always come in when they want but they usually choose to stay out so I just call them in when it starts to get a bit darker and colder. Living outside is definitely different though, when I let them out for a few hours they spend almost all of it running around so that will keep them warm, but I think they'd get very cold in a hutch at night
I moved mine yesterday. We are having very warm weather for this time of year. Some lows are in the 30's but we're getting mostly 40's overnight, 60-70 in the daytime. If it gets really cold, I'll bring them back in. The set up in the basement is a unheated room and I always keep the door window open an inch or so plus I take them into the yard everyday, no matter how cold it gets - they're very used to cold temps. But Leroy is still eyeing up the steps back into the basement