Fond du Lac, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.2 °C (low) to 12.9 °C (high). Annual precipitation averages 800.1 Millimeters. Fond du Lac is located in USDA Plant Hardiness Zone 5b. 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 | -11.5 °C | -3.2 °C | 31.5 mm |
| February | -10.2 °C | -1.3 °C | 27.18 mm |
| March | -4.4 °C | 5.1 °C | 42.42 mm |
| April | 2.2 °C | 12.6 °C | 80.52 mm |
| May | 8.8 °C | 19.4 °C | 89.66 mm |
| June | 14.4 °C | 24.8 °C | 115.32 mm |
| July | 16.7 °C | 27.3 °C | 93.73 mm |
| August | 15.8 °C | 26.1 °C | 90.93 mm |
| September | 11.4 °C | 22.3 °C | 75.95 mm |
| October | 4.8 °C | 14.8 °C | 71.88 mm |
| November | -1.6 °C | 6.9 °C | 45.72 mm |
| December | -7.7 °C | -0.1 °C | 35.31 mm |
| Annual | 3.2 °C | 12.9 °C | 800.12 mm |
| 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |