Lynnville, Indiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.7 °F (low) to 66.4 °F (high). Annual precipitation averages 49.8 Inches. Lynnville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.8 °F | 40.7 °F | 3.52 in. |
| February | 26.2 °F | 45.5 °F | 3.14 in. |
| March | 34.6 °F | 55.4 °F | 4.41 in. |
| April | 45.1 °F | 67.5 °F | 5.33 in. |
| May | 55.3 °F | 76.7 °F | 5.51 in. |
| June | 63.9 °F | 84.7 °F | 4.78 in. |
| July | 67.3 °F | 87.8 °F | 4.37 in. |
| August | 65.2 °F | 87.0 °F | 3.18 in. |
| September | 57.5 °F | 81.2 °F | 3.85 in. |
| October | 46.0 °F | 69.7 °F | 3.58 in. |
| November | 35.6 °F | 55.8 °F | 4.13 in. |
| December | 27.9 °F | 45.0 °F | 3.96 in. |
| Annual | 45.7 °F | 66.4 °F | 49.76 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |