Newkirk, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 21.1 °C (high). Annual precipitation averages 986.3 Millimeters. Newkirk is located in USDA Plant Hardiness Zone 7a. 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 | -4.8 °C | 7.8 °C | 27.94 mm |
| February | -3.1 °C | 10.4 °C | 37.34 mm |
| March | 2.1 °C | 15.9 °C | 71.88 mm |
| April | 7.1 °C | 21 °C | 104.39 mm |
| May | 13.3 °C | 25.5 °C | 142.75 mm |
| June | 18.8 °C | 30.7 °C | 135.13 mm |
| July | 21.3 °C | 33.4 °C | 112.27 mm |
| August | 20.3 °C | 33.1 °C | 96.01 mm |
| September | 15.8 °C | 28.8 °C | 81.79 mm |
| October | 8.7 °C | 22.4 °C | 88.14 mm |
| November | 2.2 °C | 15.3 °C | 48.77 mm |
| December | -3.2 °C | 8.8 °C | 39.88 mm |
| Annual | 8.2 °C | 21.1 °C | 986.29 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |