It will usually hit -30 or so a couple times a year but I have a picture from 10 yrs ago of -45. I dont let the ducks outside until its close to -5 so a lot of mornings i have to slip some food and water into their house and they dont get much outside time on days like those. As long as temps are 5 above i give em a pool and they get 3 or 4 hours use out of it before i have to bring it in. Our property slopes away so ice buildup isnt a problem but by the end of winter i do have to raise the fence in their run area where i dont shovel.
Is that Celsius or Fahrenheit?