Theresa, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.4 °F (low) to 55.2 °F (high). Annual precipitation averages 34.5 Inches. Theresa is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.2 °F | 26.1 °F | 1.52 in. |
| February | 12.8 °F | 29.7 °F | 1.37 in. |
| March | 23.2 °F | 41.5 °F | 1.9 in. |
| April | 34.7 °F | 54.6 °F | 3.55 in. |
| May | 46.2 °F | 66.9 °F | 3.82 in. |
| June | 56.1 °F | 76.7 °F | 4.6 in. |
| July | 60.5 °F | 80.7 °F | 4.02 in. |
| August | 58.5 °F | 78.9 °F | 3.83 in. |
| September | 50.6 °F | 72.2 °F | 3.27 in. |
| October | 39.1 °F | 59.0 °F | 2.89 in. |
| November | 27.9 °F | 44.5 °F | 2.0 in. |
| December | 17.1 °F | 31.8 °F | 1.69 in. |
| Annual | 36.4 °F | 55.2 °F | 34.46 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |