At what temperature is it too cold to let the ducks out in the run? This morning it was 9 degrees when I gathered eggs and let them out. I put them back up in the duck house 15 minutes later (with food and water) because they looked frosty and they were all laying down. It is now just 33 degrees and I am thinking about letting them out to play. I do have clear plastic wrapped around the run to help block the cold wind. I just want them happy and healthy.