Marlin, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.5 °C (low) to 25.7 °C (high). Annual precipitation averages 972.8 Millimeters. 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 | 3.1 °C | 15.3 °C | 74.93 mm |
| February | 5.2 °C | 17.4 °C | 68.83 mm |
| March | 9.1 °C | 21.1 °C | 95.76 mm |
| April | 12.9 °C | 25.4 °C | 77.98 mm |
| May | 18 °C | 29.1 °C | 116.33 mm |
| June | 21.8 °C | 32.8 °C | 80.52 mm |
| July | 23.2 °C | 34.9 °C | 45.21 mm |
| August | 23 °C | 35.4 °C | 59.18 mm |
| September | 19.6 °C | 32.4 °C | 85.09 mm |
| October | 13.8 °C | 27.3 °C | 107.95 mm |
| November | 8.3 °C | 20.8 °C | 77.22 mm |
| December | 4.1 °C | 16.2 °C | 83.82 mm |
| Annual | 13.5 °C | 25.7 °C | 972.82 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |