Purcell, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.2 °F (low) to 73.3 °F (high). Annual precipitation averages 39.5 Inches. Purcell is located in USDA Plant Hardiness Zone 7b. 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 | 27.1 °F | 51.2 °F | 1.54 in. |
| February | 31.0 °F | 55.7 °F | 1.84 in. |
| March | 39.8 °F | 64.7 °F | 2.97 in. |
| April | 47.8 °F | 73.2 °F | 3.97 in. |
| May | 58.2 °F | 80.4 °F | 5.61 in. |
| June | 67.0 °F | 88.6 °F | 4.63 in. |
| July | 70.8 °F | 94.2 °F | 3.56 in. |
| August | 69.4 °F | 94.2 °F | 3.15 in. |
| September | 61.6 °F | 86.3 °F | 4.01 in. |
| October | 49.6 °F | 75.4 °F | 3.54 in. |
| November | 38.7 °F | 63.3 °F | 2.32 in. |
| December | 29.8 °F | 52.8 °F | 2.36 in. |
| Annual | 49.2 °F | 73.3 °F | 39.5 in. |
| 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |