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August 2011 Review - DFW

DFW Temperatures - August 2011            DFW - 1980 vs. 2011

  

August 2011 was the warmest month on record at Dallas/Fort Worth, besting July 1980 (92.0°) by 1.4°.

 

Dallas/Fort Worth - August Temperatures

Highest Maximum
Rank Temperature Year
1 104.3 2011
2 103.5 1952
3 102.9 1951
4 101.9 2000
5 101.7 1999
6 101.1 1943
7 100.7 2006
8
(tie)
100.5 2010
100.5 1956
10 100.2 1954
Highest Average
Rank Temperature Year
1 93.4 2011
2 91.1 1952
3 90.3 1951
4
(tie)
90.2 2000
90.2 1999
6
(tie)
89.8 2010
89.8 2006
8 89.3 1943
9 88.8 1954
10 88.5 1980
Highest Minimum
Rank Temperature Year
1 82.5 2011
2 79.0 2010
3 78.8 2006
4 78.7 1952
5 78.6 1999
6 78.5 2000
7 78.1 1934
8 78.0 2007
9 77.6 1951
10 77.5 1943

 

The summer of 2011 also topped 1980 although the average high from the summer of 1980 will remain the all-time record.

 

Dallas/Fort Worth - Summer Temperatures

Highest Maximum
Rank Temperature Year
1 101.6 1980
2 101.2 2011
3
(tie)
99.1 1954
99.1 1952
5 98.8 1998
6 98.4 1956
7 98.1 2006
8 98.0 1934
9 97.7 2008
10 97.4 1977
Highest Average
Rank Temperature Year
1 90.6 2011
2 89.2 1980
3 88.3 1998
4 87.7 1954
5 87.6 1952
6 87.5 2010
7
(tie)
87.4 2008
87.4 1934
9 87.1 2006
10 86.8 1956
Highest Minimum
Rank Temperature Year
1 79.9 2011
2 77.8 1998
3 77.6 2010
4 77.1 2008
5 76.8 1934
6 76.7 1980
7 76.3 1954
8 76.2 1925
9 76.1 2006
10
(tie)
76.0 1999
76.0 1952

  

The annual 100° day total still trails the record, but 1980 also recorded its 65th triple-digit high on August 31.  Only one year appears twice in the top 10 list of consecutive 100° days, 2011.

 

Dallas/Fort Worth - Greatest Annual and Consecutive 100° Days 

Greatest Annual
Rank # of Days Year
1 69 1980
2 65 2011*
3 56 1998
4 52 1954
5 48 1956
6 46 2000
7 44 1952
8 43 2006
9 40 1951
10 38 1963

* through August 31

Greatest Consecutive
Rank # of Days Dates
1 42 Jun 23 - Aug 3, 1980
2 40 Jul 2 - Aug 10, 2011
3 29 Jul 6 - Aug 3, 1998
4 25 Aug 2-26, 1952
5 24 Jul 28 - Aug 20, 1999
6 20 Jul 9-28, 1954
7 19 Aug 8-26, 2006
8
(tie)
18 Jul 31 - Aug 17, 2010
18 Jul 2-19, 1978
10
(tie)
17 Aug 15-31, 2011 *
17 Aug 2-18, 1956

* still active at end of August

 

Between July 2 and August 31, there were only three days at DFW Airport during which the temperature failed to reach 100°.

 

Dallas/Fort Worth - Greatest 100° Days by Month

June
Rank # of Days Year
1
(tie)
13 1980
13 1911
3 11 1953
4
(tie)
8 1998
8 1918
6
(tie)
7 2011
7 1934
8
(tie)
6 1956
6 1948
10
(tie)
5 2009
5 2008
5 1924
5 1902
July
Rank # of Days Year
1 31 1980
2 30 2011
3 28 1998
4 25 1954
5 23 1978
6 20 1956
7 19 1969
8
(tie)
16 2008
16 1977
16 1964
16 1925
August
Rank # of Days Year
1 28 2011
2
(tie)
27 2000
27 1952
4 26 1999
5
(tie)
25 2006
25 1951
7 22 2010
8
(tie)
21 1980
21 1956
21 1943

 

There were 11 days with record highs this summer.  A total of 26 daily record highs remain from the summer of 1980.

 

Dallas/Fort Worth - Annual and Consecutive Days of 105° or More

Greatest Annual
Rank # of Days Year
1 28 1980
2 18 2011*
3 17 1951
4 14 1952
5 12 1954

* through August 31

Greatest Consecutive
Rank # of Days Dates
1 11 Jul 8-18, 1980
2 10 Jun 24 - Jul 3, 1980
3
(tie)
6 Aug 1-6, 2011
6 Aug 30 - Sep 4, 2000
6 Aug 14-19, 1952
6 Aug 13-18, 1951

 

 

There were 33 record daily high minimums June-August 2011.  From 1980, only 7 remain.  There are a dozen days June-August that have record high minimums from 1998.

 

Dallas/Fort Worth - Annual and Consecutive Days with Lows of 80° or More

Greatest Annual
Rank # of Days Year
1 53 2011*
2 39 1998
3 27 2008
4 24 2010
5 23 2006

* through August 31

Greatest Consecutive
Rank # of Days Dates
1 14 Jul 19 - Aug 1, 1998
2
(tie)
13 Jul 31 - Aug 12, 2011
13 Jul 7-19, 2011
4 11 Aug 12-22, 1952
5
(tie)
9 Aug 16-24, 2011
9 Jul 21-29, 2011
9 Jul 6-14, 1998
9 Jul 19-27, 1954

 

 

The all-time record high of 113° was reached twice in 1980.  But low temperatures of 86° had never occurred in the DFW climate record prior to 2011.  There were 10 days with low temperatures of 85° of higher.  Only once before had there been a low of 85°, the last summer that the official thermometer was in downtown Fort Worth (1939).

 

On August 3, the high temperature was 109° after a morning low of 86°.  This became the highest mean temperature ever recorded for Dallas/Fort Worth, breaking the previous record from June 28, 1980.

 

 

Dallas/Fort Worth - Daily Temperatures

Highest Maximum
Rank Temperature Date
1
(tie)
113 Jun 27, 1980
113 Jun 26, 1980
3
(tie)
112 Jun 28, 1980
112 Aug 11, 1936
112 Aug 18, 1909
6 111 Sep 4, 2000
7
(tie)
110 Aug 2, 2011
110 Jul 12, 1998
110 Jul 18, 1980
110 Jul 2, 1980
110 Aug 16, 1943
110 Aug 10, 1936
Highest Average
Rank Temperature Date
1 97.5 Aug 3, 2011
2
(tie)
97.0 Aug 4, 2011
97.0 Jun 28, 1980
4
(tie)
96.5 Aug 2, 2011
96.5 Sep 1, 2000
96.5 Jul 12, 1998
96.5 Jun 27, 1980
96.5 Aug 11, 1936
96.5 Aug 10, 1936
10 96.0 Aug 20, 2011
Highest Minimum
Rank Temperature Date
1
(tie)
86 Aug 16, 2011
86 Aug 4, 2011
86 Aug 3, 2011
86 Jul 26, 2011
5
(tie)
85 Aug 31, 2011
85 Aug 22, 2011
85 Aug 20, 2011
85 Aug 17, 2011
85 Aug 7, 2011
85 Jul 25, 2011
85 Sep 1, 1939

 

Precipitation deficits continue to mount across North Texas.  Arlington recorded only 15% of its normal rainfall this summer.  At Mineral Wells, only 38% of normal precipitation has fallen since October 1, 2010, a deficit of over 8 inches.

 

ASOS Precipitation
Location August Summer (June-August) October 2010 - August 2011

Precipitation

Departure
from Normal
Precipitation Departure
from Normal
Percent
of Normal
Precipitation Departure
from Normal

Percent
of Normal

DFW Airport 0.96 -0.95 3.89 -3.97 49 21.60 -11.99 64
Waco 0.08 -1.97 1.43 -5.84 20 13.92 -17.71 44
Dallas Love Field 0.93 -0.94 4.63 -3.56 57 22.86 -11.87 66
Fort Worth Meacham 0.92 -0.92 3.61 -5.78 38 16.86 -17.01 50
Dallas Executive 0.50 -3.07 2.67 -7.54 26 18.20 -19.49 48
Fort Worth Alliance 1.36 -1.15 3.36 -5.96 36 17.63 -16.85 51
Arlington 0.38 -1.59 1.30 -7.24 15 18.17 -16.37 53
Denton 1.75 -0.02 4.30 -4.35 50 20.81 -14.72 59
McKinney 0.32 -1.63 1.72 -6.47 21 20.00 -16.92 54
Terrell 0.25 -1.87 4.02 -4.90 45 25.57 -12.53 67
Corsicana 0.05 -2.06 4.53 -3.87 54 21.58 -15.96 57
Mineral Wells 2.00 -0.24 2.49 -5.90 30 11.20 -18.03 38

 


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