National Weather Service United States Department of Commerce

September 2015 was a very warm and dry month across most of central and northeast South Dakota as well as west central Minnesota.  All locations except for Pierre had one of their top ten warmest Septembers on record.  Average temperatures were anywhere from four  to seven degrees above normal for the month.   Timber Lake had their second warmest September on record while Mobridge had their third warmest.  Average September temperatures for Watertown were the fourth warmest with Sisseton the fifth warmest on record.  Finally, Aberdeen and Kennebec had their eighth and ninth warmest Septembers on record, respectively.  Highs for the month were in the 90s with Pierre reaching 100 degrees on the third.  Also, no freezing temperatures occurred at each of the locations with lows only in the mid to upper 30s for the month.

As far as precipitation, all locations had below normal rainfall except for Kennebec.  Locations in northeast South Dakota and west central Minnesota were very dry with rainfall amounts all under one inch or from nearly two to two and half inches below normal.

 SEPTEMBER 2015

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature / Date

93 / 3rd

92 / 3rd

91 / 22nd

91 / 3rd

Coldest Temperature / Date

33 / 19th

35 / 29th

39 / 29th

37 / 19th, 29th

Average High / Departure from Normal

78.9 / +6.8

79.0 / +6.8

78.4 / +7.3

77.0 / +6.4

Average Low / Departure from Normal

51.3 / +5.6

52.2 / +4.9

53.4 / +5.8

53.6 / +6.2

Monthly Average / Departure from Normal

65.1 / +6.2

65.6 / +5.9

65.9 / +6.6

65.3 / +6.3

Precipitation Data

       

Monthly Precipitation / Departure from Normal

0.37 / -1.82

0.34 / -2.20

0.78 / -2.31

0.27 / -2.37

Most Precipitation in 24 hours / Date

0.17 / 18th

0.17 / 18th

0.46 / 5th

0.14 / 17-18th

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature / Date

100 / 3rd

99 / 2nd

99 / 3rd

99 / 3rd

Coldest Temperature / Date

37 / 19th

36 / 19th

38 / 11th

39 / 11th

Average High / Departure from Normal

80.8 / +4.3

84.0 / +4.8

81.6 / +7.7

82.2 / +7.2

Average Low / Departure from Normal

52.9 / +3.7

54.6 / +5.3

53.3 / +5.7

52.2 / +4.8

Monthly Average / Departure from Normal

66.9 / +4.0

69.3 / +5.0

67.4 / +6.7

67.2 / +6.0

Precipitation Data

       

Monthly Precipitation / Departure from Normal

1.18 / -0.69

2.11 / +0.34

0.74 / -0.80

0.66 / -0.78

Most Precipitation in 24 hours / Date

0.39 / 7th

1.33 / 8th

0.55 / 18th

0.64 / 18th