Murphy, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13 °C (low) to 24.5 °C (high). Annual precipitation averages 1047.5 Millimeters. Murphy is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.7 °C | 13.2 °C | 67.56 mm |
| February | 3.8 °C | 15.6 °C | 75.18 mm |
| March | 8.1 °C | 19.7 °C | 93.22 mm |
| April | 12.3 °C | 24 °C | 90.93 mm |
| May | 17.5 °C | 28.1 °C | 129.29 mm |
| June | 21.9 °C | 32.5 °C | 101.09 mm |
| July | 23.7 °C | 34.8 °C | 55.12 mm |
| August | 23.5 °C | 35.1 °C | 58.67 mm |
| September | 19.6 °C | 31.3 °C | 81.03 mm |
| October | 13.2 °C | 25.8 °C | 120.65 mm |
| November | 7.5 °C | 19.2 °C | 83.31 mm |
| December | 2.9 °C | 14.3 °C | 91.44 mm |
| Annual | 13 °C | 24.5 °C | 1047.49 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |