July 2006 Climatic Summary

The first 10 days of July saw near normal temperatures and mainly dry weather. Isolated severe weather was reported in northeastern Wyoming, the Black Hills and southwestern South Dakota on July 1 and 2 and again on July 6 and 7. The dry weather would be the norm for the month, while the seasonable temperatures would give way too much above normal temperatures through the rest of the month.
 
Hot and dry weather arrived on July 11 and continued until July 19 with July 14 through July 16 the hottest days. On July 16, 10 different locations recorded all-time record high temperatures, including a South Dakota state record tying 120 degrees at Usta 8WNW.  A few other all-time highs include: Cottonwood 2E with 117 degrees, Philip and Milesville 5NE at 116 degrees, Interior 114 degrees and the Rapid City Airport with 111 degrees.

Isolated severe weather was reported on July 12. Severe weather was again reported in northwestern South Dakota on July 19 and 20 ahead of a cold front. A brief cool down occurred on July 20 and 21 before hot and dry weather returned from July 22 through July 30.  Isolated severe weather occurred again on the South Dakota plains on July 24 and July 26.
 
Record heat once again struck the region from July 28 through July 30 with numerous record highs set each day.  Spearfish and Fort Meade tied all-time record highs on July 28; which had been set just 12 days earlier on July 16.  Finally on July 31 a cold front moved across the region with temperatures cooling over all but south central South Dakota.
 
July was the second warmest July on record and the warmest since 1936. Temperatures averaged 5 to 7 degrees above normal. Averages ranged from 10.4 degrees above normal at Camp Crook to 3.8 degrees above normal at Lead and Custer in the Black Hills. Several locations recorded the warmest July on record including Fort Meade, Interior, Lemmon, Long Valley, Maurine 10SW, Milesville 5NE, Mission 14S, Newell, Redig 11NE and Spearfish.

July was also a very dry month across western South Dakota and northeastern Wyoming. Precipitation averaged only 30 to 40 percent of normal with several locations receiving less than 10 percent of normal precipitation. These include Winner with 1 percent of normal, Ladner 9SW and Redig 11NE 3 percent, Cedar Butte 5 percent, Kadoka, Long Valley and Colony, Wyoming 7 percent, and Newell 9 percent. Winner, Redig 11NE,
Maurine 10SW and Gillette 4SE all recorded the driest July’s on record. Oglala 1S was the wet spot with 193 percent of normal precipitation, thanks to 3.80 inches on July 13, and the dry spot was Winner where only 1 percent of normal precipitation occurred.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

111 degrees

15th

98 degrees

28th

105 degrees

28th

Minimum Temperature

56 degrees

2nd

49 degrees

22nd

51 degrees

3rd

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly  Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

0.77 inches

 

1.01 inches

 

0.05 inches

 

Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.22 inches

2nd

0.35 inches

1st

0.05 inches

1st

Maximum Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

120 degrees

Usta 8 WNW

15th

108 degrees

Colony
Dillinger
Newcastle
Weston

28th                 29th                  16th                  28th

Minimum Temperature

42 degrees

Medicine Mtn.

14th, 15th, 22nd

45 degrees

Dillinger
Upton 14 ENE

2nd               22nd,   23rd

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

4.45 inches

Oglala 1S

 

2.04 inches

Newcastle

 

Minimum Precipitation

0.04 inches

Winner

 

0.05 inches

Gillette 4 SE

 

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

Minimum Snowfall

0.0 inches

 

 

0.0 inches

 

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

3.80 inches

Oglala 1S

13th

1.02 inches

Newcastle

31st

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

Fort Meade

July

79.5 degrees Avg. Temperature

77.8 degrees

2002

Interior 3NE

July

85.0 degrees Avg. Temperature

82.5 degrees

1974

Lemmon

July

79.2 degrees Avg. Temperature

78.1 degrees

2002

Long Valley

July

81.4 degrees Avg. Temperature

81.0 degrees

1974

Maurine 10SW

July

79.6 degrees Avg. Temperature

78.4 degrees

2002

Milesville 5NE

July

81.8 degrees Avg. Temperature

80.5 degrees

2002

Mission 14S

July

78.7 degrees Avg. Temperature

78.6 degrees

1974

Newell

July

78.4 degrees Avg. Temperature

77.0 degrees

2002

Rapid City Reg. Airport

July

79.3 degrees Avg. Temperature

78.3 degrees

2002

Redig 11NE

July

78.1 degrees Avg. Temperature

76.6 degrees 

2002

Spearfish

July

79.5 degrees Avg. Temperature

77.6 degrees

2002

Gillette 4SE, WY

July

0.05 inches rainfall

0.10 inches

1959

Maurine 10SW

July

0.40 inches rainfall

0.41 inches

1988

Mission 14S

July

0.46 inches rainfall

0.50 inches

1968

Redig 11NE

July

0.07 inches rainfall

0.26 inches

1971

Winner

July

0.04 inches rainfal

0.25 inches

1952

Cottonwood 2E

7/15/2006

117 degrees

116 degrees

7/20/1910

Milesville 5NE

7/15/2006

116 degrees

115 degrees

7/24/1952

Interior 3NE

7/15/2006

114 degrees

111 degrees

7/6/1973

 

7/16/2006

114 degrees

 

 

Rapid City Reg. Airport

7/15/2006

111 degrees

110 degrees

7/8/1989

Spearfish

7/15/2006

109 degrees

106 degrees

7/9/1954

 

7/28/2006

 

 

 

Fort Meade

7/15/2006

108 degrees

107 degress

7/16/2005

 

7/28/2006

 

 

 

Newcastle

7/16/2006

108 degrees

108 degrees

7/5/1936

Pactola Dam

7/16/2006

101 degrees

100 degrees

7/9/1989

 

7/30/2006

 

 

 

 

 

Mount Rushmore

7/30/2006

100 degees

100 degrees

7/11/1985

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