Nation There were 248 tornadoes across US in May and June. That’s one of the lowest numbers in recorded history. July 9, 2020Isabella Redjai, USA TODAYComments Off on There were 248 tornadoes across US in May and June. That’s one of the lowest numbers in recorded history. There was a preliminary total of 248 tornadoes across May and June — a combined count less than April's 256 and among the lowest numbers in history.