Linn, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 63.5 °F (low) to 85.9 °F (high). Annual precipitation averages 23.5 Inches. Linn is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 48.3 °F | 71.2 °F | 0.94 in. |
| February | 52.6 °F | 76.0 °F | 1.04 in. |
| March | 58.5 °F | 81.0 °F | 1.24 in. |
| April | 64.2 °F | 86.5 °F | 1.37 in. |
| May | 70.7 °F | 91.7 °F | 2.52 in. |
| June | 74.6 °F | 96.3 °F | 2.58 in. |
| July | 75.7 °F | 97.1 °F | 2.27 in. |
| August | 75.5 °F | 98.2 °F | 1.65 in. |
| September | 72.0 °F | 92.9 °F | 4.8 in. |
| October | 64.4 °F | 88.0 °F | 2.7 in. |
| November | 56.2 °F | 79.6 °F | 1.33 in. |
| December | 49.2 °F | 72.7 °F | 1.08 in. |
| Annual | 63.5 °F | 85.9 °F | 23.52 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |