When do garter snakes come out of hibernation in the midwest?

Try not to post multiple times please. I was just forwarning you. I am sure someone will be along to help you soon and to move your answer. I can try and help if you could let me know what part of the midwest you are talking about?

Here is a similar post that might be helpful.

https://www.askmehelpdesk.com/zoology/when-do-snakes-come-out-hibernation-23491.html

I would say it is about that time of year that they will be coming out. LIke one person that answered the above post, Garter snakes are the first to come out around 34 degrees or more. I hope this helps.