Necedah, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.4 °C (low) to 13.3 °C (high). Annual precipitation averages 887.5 Millimeters. Necedah is located in USDA Plant Hardiness Zone 4b. 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 | -14 °C | -3.6 °C | 29.72 mm |
| February | -12.3 °C | -0.8 °C | 28.45 mm |
| March | -6.1 °C | 5.8 °C | 43.94 mm |
| April | 0.7 °C | 13.6 °C | 86.36 mm |
| May | 7.6 °C | 20.5 °C | 106.17 mm |
| June | 13.1 °C | 25.8 °C | 129.03 mm |
| July | 15.2 °C | 27.9 °C | 116.08 mm |
| August | 13.8 °C | 26.6 °C | 105.92 mm |
| September | 9.3 °C | 22.6 °C | 89.92 mm |
| October | 2.8 °C | 15.1 °C | 68.07 mm |
| November | -3.6 °C | 6.4 °C | 45.97 mm |
| December | -9.8 °C | -0.7 °C | 37.85 mm |
| Annual | 1.4 °C | 13.3 °C | 887.48 mm |
| 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |