All-time weather records — Castle Hills, TX

Record high
111.0°F
September 5, 2000
Record low
0.0°F
January 31, 1949
Wettest day
11.26 in
October 17, 1998

Climate change signal in Castle Hills

28.1%

of Castle Hills's all-time daily heat records were set in the last decade (103 of 366 records since 2015).

5.7%

of all-time daily cold records were set in the last decade (21 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1940s
16
28
1950s
37
45
1960s
24
73
1970s
32
75
1980s
44
65
1990s
34
35
2000s
48
17
2010s
50
15
2020s
81
13

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1947, the latest in 2026. Period of observation: 1946-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 89.1°F — Jan 2, 2026 0.0°F — Jan 31, 1949 2.94 in — Jan 25, 2012
February 100.0°F — Feb 21, 1996 6.1°F — Feb 2, 1951 2.44 in — Feb 3, 1986
March 100.0°F — Mar 6, 1991 19.0°F — Mar 2, 1980 3.51 in — Mar 28, 2018
April 100.9°F — Apr 19, 1996 30.9°F — Apr 3, 1987 3.60 in — Apr 26, 1990
May 104.0°F — May 31, 2004 42.1°F — May 4, 2013 9.87 in — May 25, 2013
June 108.0°F — Jun 29, 2013 53.1°F — Jun 2, 1964 6.18 in — Jun 3, 1951
July 107.1°F — Jul 11, 2022 62.1°F — Jul 16, 1967 9.52 in — Jul 1, 2002
August 109.9°F — Aug 28, 2011 61.0°F — Aug 25, 1966 5.73 in — Aug 16, 2007
September 111.0°F — Sep 5, 2000 46.0°F — Sep 19, 1981 6.54 in — Sep 26, 1973
October 99.0°F — Oct 12, 1991 27.0°F — Oct 31, 1993 11.26 in — Oct 17, 1998
November 93.9°F — Nov 4, 1988 21.0°F — Nov 29, 1976 4.87 in — Nov 1, 1977
December 90.0°F — Dec 25, 1955 6.1°F — Dec 23, 1989 5.97 in — Dec 19, 1991

Click a month to see every daily record for that month in Castle Hills.