In the tables below, * denotes an official state record as designated by NOAA's National Centers for Environmental Information (NCEI); records with ** await NCEI approval as a state record. All other records are calculated from data at the Oklahoma Climatological Survey and have not been sent to NCDC for official designation.
| Variable | Value | Location (Data Source) | Date |
|---|---|---|---|
| Maximum temperature * | 120°F | Alva (COOP) | July 18, 1936 |
| Altus (COOP) | July 19, 1936 | ||
| Poteau (COOP) | August 10, 1936 | ||
| Altus (COOP) | August 12, 1936 | ||
| Minimum temperature * | −31°F | Nowata (Mesonet) | February 10, 2011 |
| Number of days with temperature ≥ 100°F | 101 | Grandfield (Mesonet) | 2011 |
| Number of consecutive days with temperature ≥ 100°F | 70 | Hammon (COOP) | June 24, 1980 to September 1, 1980 |
| Warmest summer (June to August) | 86.9°F | Statewide average | June 1, 2011 to August 31, 2011 |
| Variable | Value | Location (Data Source) | Date |
|---|---|---|---|
| 24-hour rainfall * | 15.68 inches | Enid (COOP) | October 11, 1973 |
| 24-hour snowfall * | 27 inches | Spavinaw (COOP) | 11 PM CST on February 8, 2011 to 11 PM CST on February 9, 2011 |
| Snow depth * | 36 inches | Buffalo (COOP) | February 22, 1971 |
| Lowest annual total precipitation | 6.53 inches | Regnier (COOP) | 1956 |
| Driest year | 19.04 inches | Statewide average (COOP) | 1910 |
| Variable | Value | Location (Data Source) | Date |
|---|---|---|---|
| Wind gust * | 150.8 mph | El Reno (Mesonet) | May 24, 2011 |
| Hail stone diameter * | 6.0 inches | 2 miles north of Gotebo | May 23, 2011 |
