My thoroughbred is rugged every night! He really feels the cold and his coat stands on end if I dont. The only night this year I didnt was a week ago when it was still 22 degrees at 11pm. My warmblood is not rugged however and doesnt seem to mind the rain so he was out all day yesterday without a rug - in at night however, as they both are.
Mine was out in her fly sheet only last night and this morning was shivering so violently it was like an earthquake!
Lightweight waterproof on tonight.