The hottest official temperature occurred at Greenland Ranch, California on July 10, 1913.
https://www.ncei.noaa.gov/sites/default/files/coop-form-greenland-ranch-july-1913.pdf
The second hottest was 133F on June 17, 1859 at Santa Barbara, California
29 Jun 1859, 4 – The Sacramento Bee at Newspapers.com
13 Jun 1877, Page 2 – San Francisco Chronicle at Newspapers.com
13 Aug 1859, 2 – Pointe Coupee Democrat at Newspapers.com
A few weeks after the record heat in 1859 came the largest Coronal Mass Ejection on record.
06 Sep 1859, Page 2 – Brooklyn Evening Star at Newspapers.com
02 Sep 1859, 3 – News Herald at Newspapers.com
14 Sep 1859, Page 1 – The Louisville Daily Courier at Newspapers.com
31 Aug 1859, 1 – The Cadiz Sentinel at Newspapers.com
There was a tremendous flood on the Mississippi the week before the record heat in Santa Barbara
09 Jun 1859, 2 – Chicago Tribune at Newspapers.com
14 May 1859, 1 – The Courier-Journal at Newspapers.com
30 Apr 1859, Page 1 – The Times-Picayune at Newspapers.com
29 Oct 1859, 3 – Sheffield and Rotherham Independent at Newspapers.com
01 Nov 1859, 4 – The Leeds Mercury at Newspapers.com
EXCEPTIONAL YEARS: A HISTORY OF CALIFORNIA FLOODS AND DROUGHT
