Randlett, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.2 °C (low) to 24.2 °C (high). Annual precipitation averages 766.6 Millimeters. Randlett is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.7 °C | 12.1 °C | 32.26 mm |
| February | 0.1 °C | 14.4 °C | 38.35 mm |
| March | 4.7 °C | 19.3 °C | 59.94 mm |
| April | 9.1 °C | 23.9 °C | 73.41 mm |
| May | 15.1 °C | 28.5 °C | 107.7 mm |
| June | 20.1 °C | 33.2 °C | 87.63 mm |
| July | 22.2 °C | 36 °C | 58.93 mm |
| August | 21.7 °C | 35.9 °C | 64.77 mm |
| September | 17.3 °C | 31.3 °C | 74.93 mm |
| October | 10.6 °C | 25.2 °C | 74.93 mm |
| November | 4.3 °C | 18.2 °C | 51.56 mm |
| December | -0.8 °C | 12.7 °C | 42.16 mm |
| Annual | 10.2 °C | 24.2 °C | 766.57 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |