The hottest temperature recorded in Alamo Lake State Park was  on July 29, 1995, while the coldest temperature recorded was  on December 26, 1990, January 15, 2007, January 4–5, 2019, and January 22, 2023.
The maximum temperature in Alamo Lake State Park occurred on July 29, 1995, whereas the minimum temperature was recorded on December 26, 1990, January 15, 2007, January 4–5, 2019, and January 22, 2023.