Carter, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.4 °F (low) to 73.3 °F (high). Annual precipitation averages 27.1 Inches. Carter is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.5 °F | 51.2 °F | 0.87 in. |
| February | 28.5 °F | 54.8 °F | 1.04 in. |
| March | 36.9 °F | 64.1 °F | 1.82 in. |
| April | 45.3 °F | 72.7 °F | 2.7 in. |
| May | 56.0 °F | 81.4 °F | 4.04 in. |
| June | 65.7 °F | 90.2 °F | 3.43 in. |
| July | 69.6 °F | 95.5 °F | 2.22 in. |
| August | 68.4 °F | 94.6 °F | 3.29 in. |
| September | 60.7 °F | 86.5 °F | 2.6 in. |
| October | 48.2 °F | 74.9 °F | 2.52 in. |
| November | 36.2 °F | 62.3 °F | 1.42 in. |
| December | 27.2 °F | 51.8 °F | 1.15 in. |
| Annual | 47.4 °F | 73.3 °F | 27.1 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 | Exceptional Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |