Atwood, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 22.7 °C (high). Annual precipitation averages 1065.8 Millimeters. Atwood 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 | -2.4 °C | 10.7 °C | 48.26 mm |
| February | -0.3 °C | 12.9 °C | 46.48 mm |
| March | 4.3 °C | 17.8 °C | 81.28 mm |
| April | 8.9 °C | 22.6 °C | 107.95 mm |
| May | 14.6 °C | 26.4 °C | 143.26 mm |
| June | 19.4 °C | 31.1 °C | 119.13 mm |
| July | 21.3 °C | 34 °C | 94.49 mm |
| August | 20.6 °C | 34.2 °C | 81.03 mm |
| September | 16.3 °C | 30.1 °C | 103.63 mm |
| October | 9.9 °C | 23.8 °C | 97.28 mm |
| November | 3.9 °C | 17.5 °C | 72.9 mm |
| December | -0.9 °C | 11.7 °C | 70.1 mm |
| Annual | 9.6 °C | 22.7 °C | 1065.79 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |