Proctor, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 21.7 °C (high). Annual precipitation averages 1233.7 Millimeters. Proctor 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.7 °C | 9.3 °C | 67.82 mm |
| February | -0.8 °C | 11.8 °C | 64.01 mm |
| March | 3.9 °C | 16.7 °C | 101.85 mm |
| April | 8.6 °C | 21.8 °C | 123.7 mm |
| May | 14 °C | 25.7 °C | 157.23 mm |
| June | 19 °C | 30.2 °C | 128.78 mm |
| July | 21.2 °C | 33.2 °C | 103.63 mm |
| August | 20.4 °C | 33.1 °C | 89.92 mm |
| September | 16.1 °C | 29 °C | 114.3 mm |
| October | 9.8 °C | 22.8 °C | 109.47 mm |
| November | 3.8 °C | 16.4 °C | 95.25 mm |
| December | -1 °C | 10.6 °C | 77.72 mm |
| Annual | 9.4 °C | 21.7 °C | 1233.68 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |