Current temperature here in Boulder is 52 degrees. Temperatures have been falling for several hours.

Our warmest June 24 was in 1954, when temperatures were 2X current temperatures – at 104 degrees. The coldest June 23 was in 1906, when temperatures only got up to 64 degrees. I will be surprised if it gets that warm today.

On this date in 1988, James Hansen announced that heatwaves were going to become much more common.