Mazomanie, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.6 °F (low) to 56.9 °F (high). Annual precipitation averages 36.7 Inches. Mazomanie 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 | 9.7 °F | 27.3 °F | 1.46 in. |
| February | 12.3 °F | 31.5 °F | 1.35 in. |
| March | 23.4 °F | 43.4 °F | 2.0 in. |
| April | 35.1 °F | 57.2 °F | 3.82 in. |
| May | 47.0 °F | 69.4 °F | 4.4 in. |
| June | 57.6 °F | 78.9 °F | 5.26 in. |
| July | 61.2 °F | 82.5 °F | 4.57 in. |
| August | 59.0 °F | 80.7 °F | 4.06 in. |
| September | 50.5 °F | 73.5 °F | 3.24 in. |
| October | 38.8 °F | 60.7 °F | 2.71 in. |
| November | 27.5 °F | 45.4 °F | 2.22 in. |
| December | 16.9 °F | 32.8 °F | 1.56 in. |
| Annual | 36.6 °F | 56.9 °F | 36.65 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 |