Kirvin, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.3 °F (low) to 77.7 °F (high). Annual precipitation averages 42.6 Inches. Kirvin 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.7 °F | 58.5 °F | 3.18 in. |
| February | 40.4 °F | 62.6 °F | 3.25 in. |
| March | 47.1 °F | 69.4 °F | 3.89 in. |
| April | 53.9 °F | 77.1 °F | 3.65 in. |
| May | 63.1 °F | 83.8 °F | 4.5 in. |
| June | 70.6 °F | 91.0 °F | 4.03 in. |
| July | 73.0 °F | 94.9 °F | 1.98 in. |
| August | 72.6 °F | 96.2 °F | 2.63 in. |
| September | 66.3 °F | 89.9 °F | 3.45 in. |
| October | 55.8 °F | 80.0 °F | 4.64 in. |
| November | 45.9 °F | 68.6 °F | 3.56 in. |
| December | 38.4 °F | 60.1 °F | 3.82 in. |
| Annual | 55.3 °F | 77.7 °F | 42.58 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |