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 30 July 1999 → At nine o'clock in the morning Chicago recorded its highest ever dew point temperature of 82 degrees. The temperature at the time was 88, resulting in a heat index of 108. The dew point is an indication of the amount of moisture in the air.

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October 27, 1991:

The first winter storm of the season moved across western and northern South Dakota. The storm produced widespread snow and freezing rain. Strong winds also produced blowing snow which caused blizzard conditions. Snow amounts ranged from 3 to 11 inches. Many schools and businesses in western South Dakota were closed. Snow drifts, as high as 6 feet, made many roads impassable. Travel across western South Dakota was extremely difficult, if not impossible. Forty traffic accidents occurred in the Black Hills while five accidents were reported in Pierre. A semi overturned east of Kadoka. Many major roads were closed due to the snow and visibility. Rapid City airport was closed. Freezing rain downed electric and telephone lines in Mobridge, Gettysburg, Belvidere, Midland, and Mission. Ice also broke six power poles in Walworth County. Some rural areas were without electricity for 30 hours. Three accidents in Aberdeen were attributed to slippery roads.


Record Highs: Record Lows:
Aberdeen: 83 (1983) Aberdeen: 10 (1919)
Kennebec: 87 (1938) Kennebec: 4 (1910)
Mobridge: 81 (1944) Mobridge: 17 (1952)
Pierre: 90 (1938) Pierre: 17 (1951)
Sisseton: 82 (1983) Sisseton: 13 (1976)
Timber Lake: 81 (1944) Timber Lake: 16 (1976)
Watertown: 78 (1983) Watertown: 12 (1967)
Wheaton: 82 (1983) Wheaton: 11 (1976)

Record Precipitation:
Aberdeen: 0.39" (1921) Aberdeen: 2.0" (1919)
Kennebec: 0.40" (1980) Kennebec: 5.0" (1980)
Mobridge: 0.50" (1991) Mobridge: 1.7" (2010)
Pierre: 0.42" (1991) Pierre: 1.5" (2010)
Sisseton: 0.62" (1971) Sisseton: 0.1" (2010)
Timber Lake: 0.56" (1931) Timber Lake: 1.5" (2010)
Watertown: 1.27" (1971) Watertown: 1.0" (1923)
Wheaton: 0.86" (1971) Wheaton: 2.0" (1919)


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