Piedmont, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.9 °F (low) to 71.5 °F (high). Annual precipitation averages 34.3 Inches. Piedmont 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 | 26.5 °F | 49.3 °F | 1.14 in. |
| February | 30.1 °F | 53.3 °F | 1.43 in. |
| March | 38.4 °F | 62.5 °F | 2.51 in. |
| April | 47.3 °F | 71.1 °F | 3.55 in. |
| May | 58.0 °F | 79.5 °F | 4.99 in. |
| June | 67.3 °F | 88.1 °F | 4.71 in. |
| July | 71.4 °F | 93.0 °F | 3.07 in. |
| August | 69.8 °F | 92.3 °F | 3.31 in. |
| September | 61.8 °F | 84.5 °F | 3.11 in. |
| October | 49.5 °F | 73.4 °F | 3.03 in. |
| November | 37.9 °F | 60.8 °F | 1.84 in. |
| December | 29.0 °F | 50.4 °F | 1.61 in. |
| Annual | 48.9 °F | 71.5 °F | 34.3 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |