Tennyson, Indiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.8 °F (low) to 67.2 °F (high). Annual precipitation averages 49.9 Inches. Tennyson 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 | 25.2 °F | 41.9 °F | 3.57 in. |
| February | 27.6 °F | 46.5 °F | 3.34 in. |
| March | 35.7 °F | 56.4 °F | 4.57 in. |
| April | 46.0 °F | 68.4 °F | 5.22 in. |
| May | 56.2 °F | 77.4 °F | 5.4 in. |
| June | 64.7 °F | 85.4 °F | 4.67 in. |
| July | 68.1 °F | 88.2 °F | 4.47 in. |
| August | 66.1 °F | 87.6 °F | 3.18 in. |
| September | 58.6 °F | 81.9 °F | 3.74 in. |
| October | 47.0 °F | 70.5 °F | 3.59 in. |
| November | 36.7 °F | 56.6 °F | 4.04 in. |
| December | 29.3 °F | 46.0 °F | 4.14 in. |
| Annual | 46.8 °F | 67.2 °F | 49.93 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 |