July Climate Information

The average temperatures for July 2010 across central and northeast South Dakota and west central Minnesota were near normal with average temperatures within one degree of normal. The highest temperatures for the month of July were in the mid to upper 90s with 105 and 106 degrees at Kennebec and Pierre, respectively. The total precipitation for July was also not far off from normal for most locations except for Sisseton and Kennebec. Sisseton was 1.25 inches below normal while Kennebec was 2.25 inches above normal.

The big stories for the month of July across the area were the record breaking hail in central South Dakota, the dam failure in southeast Hand County, and Pierre finally surpassing the 100 degree mark.   On July 23rd, 8 inch diameter hail fell at Vivian, South Dakota breaking the U.S. record set in Aurora, Nebraska. The hailstone also broke the weight record weighing in at almost two pounds. On July 30th, very heavy rains from 5 to 10 inches brought flash flooding to southeast Hand County causing the Rose Hill dam to fail. Finally, after experiencing two consecutive summers without reaching 100 degrees, Pierre finally surpassed the century mark on July 17th reaching 106 degrees. 

JULY 2010

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature / Date

96 / 17th

96 / 17th

98 / 18th

93 / 17th

Coldest Temperature / Date

55 / 25th

53 / 25th

57 / 13-14th, 28th

52 / 12th

Average High / Departure from Normal

84.0 / -0.7

83.1 / -0.6

82.8 / -2.1

82.0 / -0.5

Average Low / Departure from Normal

61.1 / +1.4

60.5 / +0.1

61.5 / +0.5

60.5 / +2.3

Monthly Average / Departure from Normal

72.6 / +0.4

71.8 / -0.3

72.2 / -0.8

71.2 / +0.8

Precipitation Data

       

Monthly Precipitation / Departure from Normal

3.24 / +0.32

1.88 / -1.25

2.49 / -0.62

3.03 /+0.12

Most Precipitation in 24 hours / Date

1.88 / 3rd-4th

0.72 / 6-7th

0.95 /4th

1.23 / 3-4th

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature / Date

106 / 17th

105 / 17th

96 / 2nd, 10th, 17th

98 / 3rd

Coldest Temperature / Date

56 / 7th & 8th

53 / 8th & 15th

51 / 8th

50 / 8th

Average High / Departure from Normal

87.7 / -1.5

89.1 / -1.7

85.2 / -0.2

85.9 / +1.0

Average Low / Departure from Normal

61.5 / -0.3

62.4 / +0.9

59.6 / -1.4

58.4 / -1.0

Monthly Average / Departure from Normal

74.6 / -0.9

75.7 / -0.4

72.4 / -0.8

72.2 / 0.0

Precipitation Data

       

Monthly Precipitation / Departure from Normal

2.95 / +0.20

5.03 / +2.25

1.57 / -0.70

2.91/ +0.45

Most Precipitation in 24 hours / Date

0.90 / 21st-22nd

2.15 / 22nd

0.60 / 23rd

1.12 / 23rd



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