Barnsdall, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.8 °C (low) to 21.8 °C (high). Annual precipitation averages 1055.9 Millimeters. Barnsdall 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 | -4.1 °C | 8.8 °C | 39.12 mm |
| February | -2 °C | 11.6 °C | 46.99 mm |
| March | 3.1 °C | 16.7 °C | 76.45 mm |
| April | 8.4 °C | 22.1 °C | 120.9 mm |
| May | 14.1 °C | 26 °C | 152.65 mm |
| June | 19.2 °C | 30.6 °C | 139.7 mm |
| July | 21.5 °C | 33.7 °C | 99.57 mm |
| August | 20.4 °C | 33.7 °C | 90.68 mm |
| September | 15.8 °C | 29.1 °C | 95.76 mm |
| October | 8.9 °C | 22.9 °C | 81.79 mm |
| November | 2.7 °C | 16 °C | 61.21 mm |
| December | -2.3 °C | 10.1 °C | 51.05 mm |
| Annual | 8.8 °C | 21.8 °C | 1055.87 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |