Sandy Hook, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.4 °C (low) to 14 °C (high). Annual precipitation averages 969.5 Millimeters. Sandy Hook is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.8 °C | -2.8 °C | 32.77 mm |
| February | -9.9 °C | -0.3 °C | 38.1 mm |
| March | -3.5 °C | 6.8 °C | 52.58 mm |
| April | 2.8 °C | 14.4 °C | 97.28 mm |
| May | 9.3 °C | 21 °C | 113.28 mm |
| June | 15.1 °C | 26.3 °C | 143.26 mm |
| July | 17.1 °C | 28.1 °C | 127.25 mm |
| August | 15.9 °C | 27.1 °C | 98.55 mm |
| September | 11.3 °C | 23.3 °C | 92.96 mm |
| October | 4.7 °C | 16.1 °C | 73.15 mm |
| November | -1.9 °C | 7.4 °C | 56.9 mm |
| December | -8.1 °C | 0.3 °C | 43.43 mm |
| Annual | 3.4 °C | 14 °C | 969.51 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |