How do I get my puppy to go outside in the rain?

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

1. 1
   Standing outside with the puppy in the rain
2. 2
   Using treats as positive reinforcement when they potty outside
3. 3
   Spotting the puppy squatting and manually opening the door
4. 4
   Using puppy pads indoors when the door is closed
5. 5
   Hanging a bell or strap on the door handle and training the puppy to ring it
6. 6
   Using a training button that the puppy hits with its nose
7. 7
   Taking the dog out on a strict schedule

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.