San Angelo:
Average annual number of 100 degree days (1991-2020): 30 days
Record annual and consecutive days with high temperatures of 100 degress or greater
Period of record 1907-present
| Rank | Greatest Annual Number of Days (Year) |
Most Consecutive Days and Dates (1907 - present) |
| 1 | 100 (2011) | 28 (July 2 - July 29, 2011) |
| 2 | 60 (1969) | 27 (July 7 - August 2, 1912) |
| 3 | 59 (1924)* | 26 (July 30 - August 24, 2010) |
| 4 | 58 (2020) | 24 (July 28 - August 20, 2019) |
| 5 | 56 (2012) | 18 (June 18 - July 5, 1969) |
| 55 (1917)* | 18 (July 30 - August 17, 1943) | |
| 7 | 55 (1920)* | 17 (August 15 - August 31, 2011) |
| 52 (1960)* | 17 (June 12 - June 28, 1911) | |
| 52 (1912)* | 16 (July 14 - July 29, 2018) | |
| 10 | 52 (1911)* | 16 (July 28- August 12, 2012) # |
* Denotes missing data
# Sixteen consecutive days was also matched in 2011, 1929 and 1917
Years when Maximum Temperature did not reach 100 degrees:
1950
1976
2007
Earliest and Latest Dates of Occurrence:
Average calendar date of the first 100-degree high (1991-2020): May 26
Earliest calendar date (on record) of the first 100-degree high: April 6, 1972
Latest calendar date (on record) of the first 100-degree high (in years where 100-degree temperatures occurred): August 15, 1997
Latest calendar date (on record) of the last 100-degree high: October 13, 1926
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