AGW proponents seldom fail to point at episodes of unseasonable weather as evidence that the Earth’s climate is changing.
Trouble is, “unseasonable weather” has been with humanity for a long time. So long, in fact, people have had time to give names to metereological events deemed exceptional, yet recurring.
Here’s a list extracted from an article on The New York Times Magazine, November 5, 1933 (“Indian Summer: A Myth And A Fact, Too; What The Weather Men Have To Say About The Mild Period Of The Autumn“, by Charles Fitzhugh Talman):
Names for Unseasonable Warm Periods:
- January Thaw (North America)
- Indian Summer (North America, September to December)
- Martinmas (Europe, November; around the days dedicated to Saints Luke, Martin, Michael, Bridget, Teresa, or Wenceslaus)
- Altweibersummer (“Old Wives Summer”, Germany, November)
- Halcyon Days (Ancient Greece, 14 days of calm weather around the Northern Hemisphere Winter solstice)
Names for Unseasonable Cold Periods:
- Blossom Winters (eg Blackthorn Winter, Whitethorn Winter in England; Snowball, Redbud, Dogwood Winters in North America; cold periods during springtime, between April and May)
- Ice Saints (Europe, May; cold days around the days dedicated to Saints Mamertus, Pancras, Servatius and Bonifacius May 11-14)
- Schafkaelte (“Sheep Cold”, Germany, June; cold enough to cause problems with young lambs)
- Squaw Winter (North America, September to November; cold and snow before the Indian Summer)
- Beet Winter (France, September to November; freezing cold)
Names for Unseasonable Heavy Rains:
- Lammas Floods (England, beginning of August)
- Equinoctial Storms (Ancient Rome and Europe, both equinoxes; North America, Autumnal Equinox; torrential rains, in the latter case likely to be the tail-end of hurricanes)
I am sure there’s lots more in many more cultures. The “truth” simply is that “seasonable weather” is not cast in stone: and it never has been.