We have heard it on the progressive news, July was the hottest month on record according to NOAA. In the August issue of Comstock’ Magazine, an author declares July 2017 the hottest month on record. All this hottest ever raised some question, what was the hottest month in California? Previous analysis had indicated maximum summer temperatures were declining details HERE.
One of the issues is how was the hottest month measured; there are several options. Option one is the existing network of weather stations. Option two is satellites, and option three is the Climate Reference Network (CRN). The Surface Stations project found over 90% of long term stations had siting issues that would produce a warm bias of >= 1C. UHI was a significant factor.
The CRN was established in 2004 to counter the urban heat island influence that was distorting temperatures of the existing networks of weather stations. The hottest temperature reported in the news is the product of the current system, not satellites or the CRN.
What does the CRN have to say about the hottest month? The CRN network has 143 stations in the United States, seven of them in California, all located in remote areas well away for urban influences.
- Bodega Bay
- Santa Barbara
- Stovepipe Wells
Example of remote locations
Following plots are the Maximum July temperatures at California CRN stations:
Looking at Merced over a longer period these were some of the max July temperatures: 1906 – 40.18, 1908 – 38.6, 1931 – 39.6, 1933 – 38.5, 1967 -38.1, 1988 – 38.4.
As you can see from the graphics the CRN stations did not have the hottest July in 2019. The hottest July was scattered all across the period from 2004 to 2019. When was the hottest CA CRN maximum:
As you can see the CRN Hottest Months are all over the state and different times of the year. And, when we look at the satellite temperature we can see that July was not the warmest month. According to Dr. Roy Spencer, “July 2019 was probably the 4th warmest of the last 41 years.” Details HERE.
So, when you here the lamestream press touting the warmest or hottest month of the year, you might want to be cautious, as the progressive press maybe just advancing an agenda and not reporting the facts.