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 14 July 1872 → This day broke an 18-day stretch of 90 degree temperatures in the state of Washington, where the average July temperature is a mere 70.
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October 7, 1970:

On October 7th through the 9th, 1970 a record breaking early season snow storm hit parts of southern South Dakota. Snowfall of 5 to 9 inches was common across the southwest and south central on the 7th. Late on October 8th and into the 9th of 1970 the southeast portion of the state was hit. Vermillion received 6 inches of snow on the 9th and that is the largest amount ever recorded there for so early in the season. The 5 inches that fell in Sioux Falls is the earliest significant snow on record for the area. The heavy snows also affected portions of western Iowa and western Minnesota. Amounts of up to 7 inches were recorded in northwest Iowa. The heavy, wet snow snapped many tree branches and downed power lines. Sioux city recorded their heaviest snow for so early in the season. The snow was very wet and heavy, but melted quickly over the next several days.


Record Highs: Record Lows:
Aberdeen: 88 (2006) Aberdeen: 14 (1952)
Kennebec: 95 (1942) Kennebec: 15 (2000)
Mobridge: 91 (1956) Mobridge: 19 (2000)
Pierre: 91 (2003) Pierre: 20 (2000)
Sisseton: 88 (2003) Sisseton: 16 (1976)
Timber Lake: 86 (2010) Timber Lake: 14 (2000)
Watertown: 86 (2003) Watertown: 15 (1952)
Wheaton: 91 (1993) Wheaton: 21 (1976)

Record Precipitation:
Aberdeen: 1.13" (1977) Aberdeen: 3.3" (1970)
Kennebec: 1.28" (1946) Kennebec: 9.0" (1970)
Mobridge: 0.88" (1977) Mobridge: 2.9" (1946)
Pierre: 1.14" (1946) Pierre: 3.0" (1970)
Sisseton: 1.50" (1977)
Timber Lake: 1.14" (1994) Timber Lake: 4.5" (1946)
Watertown: 1.58" (1977) Watertown: 2.5" (1970)
Wheaton: 1.48" (1949)


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