I have seen rabbits on TV living everywhere from the arctic to the desert. Can I expect a pet rabbit to do well in the same range of temperatures as their wild cousins? If not what temperature ranges are appropriate for a domestic pet rabbit?
In the modern home environment, with both heat and air conditioning a domestic house rabbit should be comfortable.
There are multiple reliable references citing optimal temperature ranges. These source are mostly for production and laboratory animals so I have chosen not to list them, but instead am summarizing the findings.
Most reference cite optimal temperatures in the 50 - 70 °F (10 - 22 °C) ranges, with some sources allowing as low as 40 °F (5 °C) or as high as 80 °F (25 °F) being acceptable.
There is nearly universal recognition that temperatures above 85 °F (29 °C) are hazardous to domestic rabbits. At temperatures above 80 °F supplemental cooling should be offered, above 85 °F it is required. (see related).
On the cool side, temperatures above freezing are not considered unsafe for a healthy rabbit, if appropriate housing that allows good shelter and food are provided. At 32 °F or 0 °C when water freezes, a rabbit that has had time to become acclimatized has lack of drinking water as a primary concern.
Temperatures that fall much below or stay below freezing for long periods, require supplemental heat (see related). Both to provide heat for the rabbit and to keep the water drinkable.