What is the best month for big tornadoes in the US

Some would regard that as the worst month...

Around here June usually.

This link lists tornados, dates and places in 2017.

US - 38 deaths, $5 billion damage

https://en.m.wikipedia.org/wiki/Tornadoes_of_2017

Here in Kansas City...usually june. But they can happen starting April until late Sept

Probably April and May. Each area has its own times where the tornadoes occur.

May I think?