Cartwright, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.9 °F (low) to 73.8 °F (high). Annual precipitation averages 41.4 Inches. Cartwright is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.2 °F | 52.8 °F | 2.18 in. |
| February | 34.7 °F | 57.0 °F | 2.51 in. |
| March | 42.5 °F | 64.8 °F | 3.59 in. |
| April | 50.3 °F | 72.9 °F | 3.69 in. |
| May | 60.0 °F | 80.1 °F | 5.48 in. |
| June | 68.5 °F | 88.6 °F | 4.24 in. |
| July | 72.6 °F | 93.6 °F | 3.09 in. |
| August | 71.2 °F | 93.9 °F | 2.62 in. |
| September | 63.6 °F | 86.6 °F | 3.5 in. |
| October | 52.1 °F | 76.2 °F | 4.05 in. |
| November | 42.2 °F | 64.4 °F | 3.24 in. |
| December | 33.6 °F | 54.7 °F | 3.21 in. |
| Annual | 51.9 °F | 73.8 °F | 41.4 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |