Pettit, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.2 °F (low) to 71.5 °F (high). Annual precipitation averages 48 Inches. Pettit 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.5 °F | 49.2 °F | 2.58 in. |
| February | 31.0 °F | 53.6 °F | 2.47 in. |
| March | 39.4 °F | 62.4 °F | 4.02 in. |
| April | 47.8 °F | 71.4 °F | 4.78 in. |
| May | 57.7 °F | 78.5 °F | 6.07 in. |
| June | 66.7 °F | 86.8 °F | 5.06 in. |
| July | 70.6 °F | 92.1 °F | 3.75 in. |
| August | 69.3 °F | 92.0 °F | 3.49 in. |
| September | 61.6 °F | 84.7 °F | 4.56 in. |
| October | 49.7 °F | 73.4 °F | 4.5 in. |
| November | 39.1 °F | 62.1 °F | 3.74 in. |
| December | 30.4 °F | 51.2 °F | 2.94 in. |
| Annual | 49.2 °F | 71.5 °F | 47.96 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |