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100 Degree Day Information and History
Afternoon highs in early August of 2003 not only made the
100 degree mark, they also went up several degrees beyond 100
and made some daily records. In addition, for Austin,
afternoon highs on August 8th made an All Time High for
the Month of August.
On August 8th, the high at Austin Mabry was 110, breaking the
previous August All Time
high of 109 set August 18, 1923. The high of 108 at
Austin Bergstrom International Airport on August 8th
broke the previous
All Time August high of 107 set August 10, 1953.
Daily record highs were set August 7 and 8 at both
Austin Climate stations. The high of 108 August 7th
and 110 August 8th were both daily records at Austin Mabry.
The high of 106 August 7th and 108 August 8th
were both daily records at Austin Bergstrom
International Airport.
The high of 100 August 6th
at Austin Bergstrom was the first 100 degree day
of 2003. On August 9th, the high at Austin Mabry
and Austin Bergstrom was 99.
At Del Rio, the high of 105 on August 8th tied the
daily record high of 105 for August 8th, previously
set August 8, 1953. On Saturday, August 9th, the
high at Del Rio was 108, breaking the previous record
high for August 8th of 107 set in 1953. The All Time
August high for Del Rio was 109 on August 17, 1969.
At San Antonio, the high of 103 on August 8th, was
1 degree lower than the record high for August 8th
of 104 set August 8, 1953. The All Time August
high for San Antonio was 108 on August 19, 1986.
The high of 101 August 7th
at San Antonio was the first 100 degree day
of 2003.
On Saturday, August 9th, the high
at San Antonio was 100, 6 degrees below the
record August 9th high of 106 set in 1953.
Looking at other locations over South Central Texas
reveals the following.
The first 100 degree day at Georgetown for 2003
was August 4th, when the high was 100.
The first 100 degree day at Burnet for 2003
was August 6th, when the high was 106.
The first 100 degree day for the following
locations in 2003 came on August 7th: Fredericksburg
with a high of 100; Hondo with a high of 100;
Kerrville with a high of 100;
La Grange with a high of 106;
New Braunfels with a high of 104;
and San Marcos with a high of 106.
Earlier in 2003, afternoon highs in June and July of 2003,
reached the
Century Mark twice at Austin Mabry and once at Del Rio.
At Del Rio, a 100 degree day occurred on July 15th,
when the high was 101. At Austin Mabry 100 degree
days came on July 30th, when the high was 101, and
on July 31st, when the high was 100.
At Austin Bergstrom International Airport, Burnet,
Georgetown, Hondo,
New Braunfels, San Marcos and San Antonio, no 100 degree
days were observed in June or July of 2003.
In May of 2003, 100 degree days were observed
at Austin Mabry and at Austin Bergstrom International
Airport on May 30th. At Del Rio, daytime highs
reached the Century Mark 9 times in May of 2003, on May 5th, 6th, 8th,
and from May 14th through May 19th.
Last year afternoon highs in the Austin and San Antonio Areas
reached the Century Mark in late August.
On Sunday August 25th, 2002 the high reached 100 at Austin Mabry.
On Monday, August 26th, the high reached 101 at Austin Bergstrom,
and 100 at the San Antonio International Airport, for the 1st 100
degree day last year, 2002. At Del Rio, the first time it
reached 100 last year was on April 29th, 2002, when the
high was 100. At New Braunfels the first time it reached 100
last year was August 7th, 2002, when the high was 100.
Earliest/Latest 100 Degree Days and All-Time Highs of Record
Location |
Earliest Date of 100 or Higher |
Latest Date of 100 or Higher |
Hottest Day of Record |
Austin Bergstrom |
101 Feb. 21, 1996 |
101 Sep. 28, 1953 |
112 Sep. 5, 2000 |
Austin Mabry |
100 May 4, 1984 |
100 Oct. 2, 1938 |
112 Sep. 5, 2000 |
Del Rio |
100 March 16, 1908 |
101 Oct. 4, 1956 |
112 Jun. 9, 1988 |
San Antonio |
100 Feb. 21, 1996 |
101 Sep. 27, 1953 |
111 Sep. 5, 2000 |
The most 100 Degree Days in any year for Austin, Del Rio, and
San Antonio follows: Austin Mueller/Mabry 69 100 Degree Days in 1925;
Del Rio 68 100 Degree Days in 1998; and San Antonio 36 100 Degree Days
in 1998.
As it took a long time for many places to reach 100 this year,
a review of
records shows that this has happened in the past, where the
1st 100 degree days
did not show up until mid to late August to early
September. In 1938, it took
until October 2nd for Austin to see its first
and only 100 degree day for that
year. Climate records also show that there were years
that No 100 degree days
showed up for the entire calendar year. The list
below shows a history of those
years when No 100 degree days came for Austin,
Del Rio and San Antonio.
Austin Mueller/Mabry.....1904, 1906, 1907, 1908, 1919, 1968,
(1898 to 2002) 1973, 1975, 1979, and 1987.
Austin Bergstrom.........1965, 1968, 1973, 1979, 1981, 1983,
(Oct. 1942 to 2002) 1987, and 1992.
Del Rio..................1919, 1931, and 1976
(Dec. 1905 to 2002)
San Antonio..............1885, 1888, 1889, 1890, 1892, 1903,
(Mar. 1885 to 2002) 1904, 1919, 1923, 1929, 1931, 1950,
1965, 1966, 1968, 1972, 1973, 1974,
1975, 1976, 1977, and 1979.
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