May 24 afternoon temperatures have been declining in the US since the 19th century, and the frequency of hot days has plummeted – with recent years being among the coolest on record. On May 24, 1926 temperatures over 100 degrees were reported in South Dakota Nebraska, Arkansas and Arizona. Kennebec, South Dakota was 105 degrees on both May 23 and May 24 that year.
via The Deplorable Climate Science Blog
May 24, 2018 at 07:01AM
Iowa Climate Science Education 