California’s Fake Temperature Record

Using my new tool set, I am homing in on what is wrong with the California temperature record.


The first problem is just their usual data tampering, which doubles the slope.  This is what the raw data looks like.

But the real dirty trick is that they successively added four hot stations over time, which pushed the temperature up on the right side of the graph. Brawley was added in 1910, Blythe was added in 1913, Needles was added in 1940, and Death Valley was added in 1961. If those stations are removed, then California maximum temperatures show no trend.

The animations below show how the successive additions of those four stations completely changed the California temperature graphs, and perverted science.

Minimum temperatures have increased, and I suspect this is primarily due to Urban Heat Island effects.  I will be looking at this more soon.

The spike in 2014 was due to the El Nino, and primarily affected winter temperatures.  Without the four hot stations corrupting the trend, California summers have cooled sharply since the 1920’s.

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21 Responses to California’s Fake Temperature Record

  1. R Shearer says:

    Nice work!

  2. Anon says:


    That is VERY INTERESTING finding. There are 4 outliers that are skewing the mean. So a couple of questions that come to mind are: where are the locations and what is the history of those stations? This also may highlight the problem of reporting temperatures from States in general – regions with arbitrarily drawn borders. Imagine a triangular shaped State with the base at the Equator and the apex at the North Pole. Reporting the average temperature in that instance would be mathematically possible but practically useless.

    The other thing I am not clear about is that you said “added” those stations. That sounds a little premeditated (but typical of the stuff we have seen). But then you say they were added in 1910, 1913, 1940… which is way before the CAGW hysteria period. If that is the case, it would just seem to be an accident (albeit a lucky one from the CAGW perspective).

    Sorry for the additional questions. The finding is very interesting none the less.

    • Josh says:

      Needles and Death Valley are among top 5 warmest areas in California on average. Average in both is above 104 during August . Meanwhile LA is around 85 in August.

      • garyh845 says:

        LA – if you adjusted current temps in Los Angeles for the UHI effect, how much hotter would we need to be in order to match, or beat these still standing 3 day record heat waves:
        From the record books, these are still standing:

        July 24, 1891 – 103
        July 25, 1891 – 109 – all time record high for the month of July.
        July 26, 1891 – 102

        Aug 17, 1885 – 104
        Aug 18, 1885 – 102
        Aug 19, 1885 – 106 – all time record high for the month of Aug.

  3. Bob Hoye says:

    Hi Tony
    My guess is that those 4 stations were added innocently. The last, Death Valley was added in 1961, well before control freaks discovered ambition.

    Perhaps you can help me with a piece I’m writing.
    Snow cover NH. Though last year’s melt season in August and September, snow cover was above the standard deviation band. After plotting within the band during the winter, “above” resumed in April. And has continued.
    Rutgers has charts showing a rising trend for winter cover, and a declining trend for summer. Their charts end in 2014. The one on the summer coverage set a low what looks like 2012 and the following two years showed a rise. Using a different chart, 2017 and 2018 summer coverage has been increasing. This suggests, now, the possibility of some 7 years of summer coverage increasing.
    Any comments?

  4. Martin says:

    There obviously is a trend in the needless temperature data tampering by which the weather records become useless. Publishing the facts is what the world needs to understand what is going on in the weather records and how these are used to tax people. Thank you Tony!

  5. Ed Bo says:

    For many years, California state climatologist James Goodridge liked to show California temperature trends grouped by county population. Of course, the counties with high population had much higher trends than those with medium population, and even more than those with low populations.

    I first saw one of these plots in 1990, and I saw several more until 2010 or so. I will try to cut loose some time later today for dig one up.

  6. Gator says:

    Minimum temperatures have increased, and I suspect this is primarily due to Urban Heat Island effects. I will be looking at this more soon.

    And I’ll be looking forward to your analysis. Great work Tony!

  7. Squidly says:

    Excellent work as usual Tony!

    For me, it doesn’t really matter. Here in Tennessee we have been slightly cooling for the past 120 years. So, all I have to do is stay right where I am and I will feel absolutely no “Global Warming” “Climate Change”.

    Got it made in the shade in beautiful Tennessee!!! … Woohoo!

  8. George C. says:

    Very interesting stuff. As was so ubiquitously stated during the earlier days of the development of computers when they were starting to be used to “manage” data more readily and “accurately” — garbage in, garbage out! That was the big scare tactic used by those who were afraid of what might be uncovered by the proliferation of those clean rooms full of strange cabinetry and huge disc drives operated by funny looking people who wore strange clothing and booties to stay warm and not contaminate the hardware and software. Even those chambers were “isolated” from the real world by double doors and raised floors. Heaven forbid we and our well-being should be measured, controlled, forecasted and somehow determined by dirty, unreliable, unsubstantiated or at least questionable “raw” data that could very well have been flawed by its very collection practices. Is it really out of the question that “figures lie and liars figure” depending on who you are, what you want and how scared you are about the unknown? I get a kick out of the (young) people today who find constant fault and forever criticize the world today and espouse how great things were in “the old days.” Yet, they are the first to use a laptop to access weather forecasts and plan activities or “research” something or someone so they can “better” their own lot. Who’s fooling whom? Go figure!

  9. Bill says:

    “But the real dirty trick is that they successively added four hot stations over time, which pushed the temperature up on the right side of the graph. Brawley was added in 1910, Blythe was added in 1913, Needles was added in 1940, and Death Valley was added in 1961.”

    These are all desert towns in the southernmost part of the state. No surprise that they skew the data set towards high temperatures. But who added them? Surely there were no anthropogenic global warming fearmongers in 1911.

    If you look at historical data, there were many record temperatures set in the 1930’s and 1940’s. Record temps were set in the early 2000’s also (not sure if this indicates records or ties).

    • tonyheller says:

      I think people are misinterpreting the meaning of adding stations. That doesn’t mean a thermometer was added, it means that the data from that thermometer is currently added starting at that date. Death Valley has data long before 1961, NOAA just doesn’t include the pre-1961 data in the USHCN record.

    • Josh says:

      Death Valley highest temp was recorded in 1913, hence NOAA does have data as early as then

  10. GW Smith says:

    You are not making any friends in the AGW-pants-on-fire-community!

    They are going to put a big bulls-eye on you!

    Keep it up, amigo!

  11. Jan Guttulsrud says:

    Is it possible to show us the trends of those 4 added stations separately ?

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