Myrtle Springs, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.4 °F (low) to 75.7 °F (high). Annual precipitation averages 45.3 Inches. Myrtle Springs is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.8 °F | 55.8 °F | 3.48 in. |
| February | 38.4 °F | 59.9 °F | 3.79 in. |
| March | 45.4 °F | 67.5 °F | 4.2 in. |
| April | 52.7 °F | 74.8 °F | 3.98 in. |
| May | 62.5 °F | 82.1 °F | 4.86 in. |
| June | 70.3 °F | 89.7 °F | 4.27 in. |
| July | 73.4 °F | 93.9 °F | 2.29 in. |
| August | 73.0 °F | 94.7 °F | 2.45 in. |
| September | 65.9 °F | 88.4 °F | 3.17 in. |
| October | 55.1 °F | 77.9 °F | 4.85 in. |
| November | 44.5 °F | 66.4 °F | 3.69 in. |
| December | 36.8 °F | 57.8 °F | 4.26 in. |
| Annual | 54.4 °F | 75.7 °F | 45.29 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |