Rat mutant with Furry mutation, no other traits that influence Debug time to summer was used, force updated by teleporting long-range out of reality bubble and back Torso slot is a bit overrated due to double stacking military rucksacks (10 warmth each for 20 total can be subtracted from Torso heat for slightly more accurate)
Spring day 36 (of 91 day seasons, default, inside):
Spring day 36 (of 91 day seasons, default, outside)
Spring day 36 (of 91 day seasons, default, inside, standing next to burning two by four in oven after waiting 30 minutes and door/window open to help "vent" radiant heat)
Summer day 36 (of 91 day seasons, default, inside):
Summer day 36 (of 91 day seasons, default, outside)
Summer day 36 (of 91 day seasons, default, inside, standing next to burning two by four in oven after waiting 30 minutes and door/window open to help "vent" radiant heat)
Allow player to shave off "furry" hair with loss of protection and cold tolerance (Becoming "Furry (Shaved) - you shaved off all that extra hair! Slimming and cool for those hot months" or something).
Time spent should be respective of size (considering #28593) - as it normally takes about 1-2 hours to completely shave a "shaggy" canine (some of the other reasons why pet grooming can take so long) and humans are larger, it might take longer but considering you're much more cooperative than an animal is, it should probably be roughly the same amount of time or less. (Source)
If we go with sheep shearing, the world record is apparently 37.9 seconds with the correct tools although those usually have teams. The average time per sheep is about two minutes with professional equipment (aka not using rusty scissors).
Lastly, length of time should be several weeks unless enhanced by blob stuff, as it takes a completely shaven area of a dog to regrow (independent of seasonality, source) average of 14.525 weeks or roughly 100 days.
If we go with sheep, then:
It takes up to six weeks for the fleece to regrow sufficiently to provide effective insulation.
Sheep grow wool continuously. If they are not sheared at least once a year, they become very stressed and uncomfortable, especially when it is hot and humid. Eventually, the wool will become matted, stained, and difficult to remove. It is inhumane to not shear sheep that require it.
So a side-effect of NOT trimming could be added in which morale decreases, move cost increases or whatnot.