Peak September Temperatures In The Midwest Have Plummeted Over The Past Century

Prior to 1950, 100 degree temperatures in the midwest were very common. They almost never happen any more.

ScreenHunter_2870 Sep. 17 08.35

About stevengoddard

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3 Responses to Peak September Temperatures In The Midwest Have Plummeted Over The Past Century

  1. alan says:

    my understanding of long ago was that Greenhouse Gas theory was
    More GHG = more cloud
    More cloud = cooler days and warmer nights, effect most felt in winter (what’s not to like)

    Your charts of declining maximums might be showing the effects of GHG – so long as it doesn’t drag us into an ice age, it is all good, better weather, longer growing seasons and increased C02 good for all that is growing.

  2. tom0mason says:

    1950 ~100°F
    2010 ~ 97-98°F
    60 year period gives around a 2°F-3°F fall.

    The decline runs at about -1°F to 1.5°F per 30 years or so. That is still quite rapid, just not fast enough for most humans to ‘feel’.
    ~3.5°F fall over a lifespan will not be noticed.

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