Dry September

 

 September dried out across central and northeast South Dakota as well as west central Minnesota with all locations having much below normal precipitation for the month.  September rainfall was from around an inch and a half to just over two inches below normal across northeast South Dakota and west central Minnesota.  The rainfall across central and north central South Dakota was around an inch below normal for the month. Wheaton and Watertown had one of their top ten driest Septembers on record.  Wheaton had their 7th driest September on record while Watertown had their 8th driest September.  Due to this dryness, the drought area expanded across the eastern part of the region from around Aberdeen to Watertown and south.

The average temperatures for September across central and north central South Dakota as well as west central Minnesota were generally from 1 to 3 degrees cooler than normal.  Some very warm temperatures were also experienced at many locations at the end of the month.  Pierre, Watertown, and Sisseton all tied or broke their high temperature records on September 28th with highs in the upper 80s and lower 90s.  On the cold side, most locations across the region experienced a frost in September with lows in the upper 20s and lower 30s.  A hard freeze of several hours of 28 degrees or lower has yet to be experienced.

SEPTEMBER  2011

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature / Date

92 / 28th

88 / 28th

88 / 12th

90 / 1st

Coldest Temperature / Date

30 / 15th

30 / 15th

33 / 15th

31 / 15th, 23rd 

Average High / Departure from Normal

73.5 / +1.4

71.8 / -0.4

71.5 / -2.7

71.0 / +0.4

Average Low / Departure from Normal

44.6 / -1.1

45.8 / -1.5

47.5 / -1.5

44.9 / -2.5

Monthly Average / Departure from Normal

59.0 / +0.1

58.8 / -0.9

59.5 / -2.1

58.0 / -1.0

Precipitation Data

       

Monthly Precipitation / Departure from Normal

0.64 / -1.55

0.42 / -2.12

0.41 / -1.69

0.35 / -2.19

Most Precipitation in 24 hours / Date

0.32 / 3rd

0.27 / 18th

0.32 / 19th

0.15 / 18th

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature / Date

93 / 11th, 28th  

96 / 1st

91 / 11th

95 / 1st

Coldest Temperature / Date

29 / 22nd

27 / 22nd

30 / 21st, 22nd

30 / 22nd

Average High / Departure from Normal

76.3 / -0.2

78.9 / -1.1

74.7 / +0.8

76.3 / -2.6

Average Low / Departure from Normal

45.7 / -3.5

44.7 / -4.2

44.6 / -3.0

45.9 / -1.0

Monthly Average / Departure from Normal

61.0 / -1.9

61.8 / -2.7

59.6 / -1.1

61.1 / -1.8

Precipitation Data

       

Monthly Precipitation / Departure from Normal

1.05 / -0.82

0.29 / -1.14

0.58 / -0.96

0.41 / -0.85

Most Precipitation in 24 hours / Date

0.75 / 3rd

0.15 / 3rd

0.33 / 2nd

0.21 / 20th



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