Phillips, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.2 °C (low) to 23.2 °C (high). Annual precipitation averages 1129.3 Millimeters. Phillips 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 | -1.7 °C | 11.1 °C | 56.9 mm |
| February | 0.4 °C | 13.6 °C | 59.44 mm |
| March | 4.8 °C | 18.1 °C | 94.49 mm |
| April | 9.4 °C | 23.1 °C | 116.08 mm |
| May | 15.1 °C | 26.8 °C | 151.13 mm |
| June | 19.8 °C | 31.4 °C | 116.33 mm |
| July | 21.8 °C | 34.3 °C | 88.39 mm |
| August | 21.1 °C | 34.7 °C | 67.82 mm |
| September | 16.9 °C | 30.5 °C | 105.41 mm |
| October | 10.4 °C | 24.4 °C | 108.97 mm |
| November | 4.4 °C | 17.9 °C | 82.8 mm |
| December | -0.3 °C | 12.2 °C | 81.53 mm |
| Annual | 10.2 °C | 23.2 °C | 1129.29 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 |