I have 1 lone butterfly left to release. He's already to go but I'm concerned because the weather is not good and it does not look like it will clear up until Sunday. What should I do?
If the weather is below 60 degrees or too rainy to release them. Then, you must keep them for a few days. If the butterfly is upset and bashing itself against the container try soothing them by putting them into a dark room.
http://www.learner.org/jnorth/tm/monarc ... gFink.html
This is a video and photo detail of Linda Fink (Lincoln Brower's wife) should you how to feed a monarch. I don't put them into running water. I have a bowl of water near where I am feeding them and dip them in after they are done to get any sugars off their legs and wings.
Unrolling the probocis is not easy at first. I have found that if you take a paper clip and then carefully place it under their chin, you can roll up the probocis and then catch the coil and unroll it. Sometimes the butterfly will feed on its own. If not, uncoil the probocis.
New hatched butterflies may not feed for up to 3 days, but it is important to provide them with water. I lightly mist the cage about 3 times a day for humidity. I also try to provide fresh flowers. Take care not to release a hiding predator (spiders like to hide in flowers) that may be brought in on the flowers.
This website has some good details on rearing from egg to adult.