All-time weather records — San Juan, TX

Record high
111.0°F
May 9, 2024
Record low
12.9°F
January 12, 1962
Wettest day
9.42 in
August 10, 1980

Climate change signal in San Juan

39.9%

of San Juan's all-time daily heat records were set in the last decade (146 of 366 records since 2015).

6.6%

of all-time daily cold records were set in the last decade (24 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 #
1960s
21
110
1970s
21
103
1980s
66
53
1990s
30
30
2000s
57
30
2010s
103
22
2020s
68
18

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 1961, the latest in 2026. Period of observation: 1961-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 96.1°F — Jan 21, 2017 12.9°F — Jan 12, 1962 2.53 in — Jan 18, 1978
February 100.9°F — Feb 23, 2017 22.1°F — Feb 15, 2021 4.00 in — Feb 25, 1983
March 105.1°F — Mar 27, 1984 30.9°F — Mar 2, 1980 8.18 in — Mar 27, 2025
April 109.0°F — Apr 6, 2022 39.9°F — Apr 8, 2007 3.29 in — Apr 21, 1966
May 111.0°F — May 9, 2024 51.1°F — May 3, 2004 4.30 in — May 3, 1981
June 111.0°F — Jun 22, 2017 59.0°F — Jun 3, 1970 6.66 in — Jun 30, 2010
July 109.0°F — Jul 7, 2009 68.0°F — Jul 2, 1963 4.63 in — Jul 7, 2021
August 108.0°F — Aug 10, 1988 57.0°F — Aug 12, 2001 9.42 in — Aug 10, 1980
September 108.0°F — Sep 4, 2011 54.0°F — Sep 30, 2020 8.85 in — Sep 14, 1973
October 104.0°F — Oct 18, 2012 41.0°F — Oct 31, 1993 7.30 in — Oct 15, 1966
November 102.0°F — Nov 4, 1988 32.0°F — Nov 5, 2002 4.08 in — Nov 16, 2001
December 96.1°F — Dec 5, 1977 18.0°F — Dec 23, 1989 2.93 in — Dec 16, 2009

Click a month to see every daily record for that month in San Juan.