Marlin, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.3 °F (low) to 78.2 °F (high). Annual precipitation averages 38.3 Inches. Marlin 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 | 37.6 °F | 59.5 °F | 2.95 in. |
| February | 41.3 °F | 63.4 °F | 2.71 in. |
| March | 48.3 °F | 70.0 °F | 3.77 in. |
| April | 55.3 °F | 77.8 °F | 3.07 in. |
| May | 64.4 °F | 84.4 °F | 4.58 in. |
| June | 71.3 °F | 91.1 °F | 3.17 in. |
| July | 73.8 °F | 94.9 °F | 1.78 in. |
| August | 73.4 °F | 95.7 °F | 2.33 in. |
| September | 67.3 °F | 90.4 °F | 3.35 in. |
| October | 56.9 °F | 81.1 °F | 4.25 in. |
| November | 46.9 °F | 69.4 °F | 3.04 in. |
| December | 39.4 °F | 61.1 °F | 3.3 in. |
| Annual | 56.3 °F | 78.2 °F | 38.3 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |