| Event | Reading | Date | Placw |
|---|---|---|---|
| Maximum Temperature | 120° | 08/12/1936 | 3mi NW Seymour |
| Maximum Temperature | 120° | 06/28/1994 | Monahans |
| Minimum Temperature** | -23° | 02/12/1899 | Tulia |
| Minimum Temperature | -23° | 02/08/1933 | Seminole |
| Greatest 24 Hour Rainfall* | 42" | 07/25/1979 | Alvin |
| Greatest 24 Hour Snowfall | 26" | 12/20/1929 | Hillsboro |
| Maximum Snow Depth | 33" | 02/07/1956 | 2mi NW Vega |
*The 24-hour rainfall of 42.00 inches was reported from an observer 8.5 miles west of Alvin, Texas between 7 AM July 25th and 7 AM July 26th, 1979 in conjunction with Tropical Storm Claudette. Observer reported that the 10-inch gauge was overflowing at his 1 AM reading, and so the 42 inches may be underreported by at least 3 inches. This 42.00-in rainfall exceeds any observed 24-hr precipitation value for the United States. 43.00 inches of rain in this storm is acknowledged as the United States national record 24-hr precipitation amount, but that value appears to have been estimated in a post-storm survey and is therefore not listed here.
**Historical value at Tulia 6NE became available upon digitization and update of previously paper-bound data. It was examined retroactively, found, to be valid and tied the prior stated record.
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