Tennyson, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.9 °F (low) to 56.6 °F (high). Annual precipitation averages 38.1 Inches. Tennyson is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.5 °F | 26.5 °F | 1.26 in. |
| February | 13.9 °F | 31.0 °F | 1.41 in. |
| March | 25.5 °F | 43.6 °F | 2.02 in. |
| April | 36.8 °F | 57.3 °F | 3.82 in. |
| May | 48.5 °F | 69.1 °F | 4.48 in. |
| June | 58.8 °F | 78.7 °F | 5.74 in. |
| July | 62.5 °F | 81.9 °F | 4.87 in. |
| August | 60.5 °F | 80.2 °F | 3.9 in. |
| September | 52.2 °F | 73.3 °F | 3.86 in. |
| October | 40.2 °F | 60.3 °F | 2.88 in. |
| November | 28.4 °F | 45.1 °F | 2.2 in. |
| December | 17.3 °F | 32.3 °F | 1.68 in. |
| Annual | 37.9 °F | 56.6 °F | 38.12 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |