Fall colors

Leaves start to turn red on a bush at Stone State Park, Sept. 21, 2017, in Sioux City. More leaves will start to turn fall colors with the official start of Autumn today.  

Tim Hynds, Sioux City Journal

SIOUX CITY | The season of fall has arrived today, and some Siouxlanders have noticed the sun isn't so direct and other changes from summer weather are at hand.

The autumnal equinox is the astronomical start of fall in the Northern Hemisphere, which will run for three months until the arrival of, ugh, winter. The National Weather Service has compiled a series of statistics that paint a historic picture of how fall months have played out in Sioux City.

Here are some highlights:

  • The earliest measurable snowfall of any year came about a week into fall, with 0.4 inches on Sept. 30, 1961.
  • The earliest significant snow (over two inches) in Sioux City came with five inches on Oct. 9, 1970.
  • The snowiest October on record was in 1991, when 9.8 inches of snow fell.
  • The snowiest November was in 1983, with 16.5 inches.
  • The latest fall season snow arrival was a year in which there was no snow at all in autumn, but rather into winter, as in 1933 the first snow didn't arrive until Christmas Day.
  • The record high October temperature was 96 degrees, on Oct. 3, 1938.
  • The record high November temperature was 82, on Nov. 8, 2006.
  • The record high December temperature was 71, on Dec. 6, 1939.
  • The record low October temperature was 5 degrees, on Oct. 29, 1925.
  • The record low November temperature was 9 degrees below zero, which has happened five times, most recently on Nov. 7, 1991.
  • The record low December temperature was 28 degrees below zero, on Dec. 29, 1917.

County and education reporter

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