Fontanet, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.3 °C (low) to 17.5 °C (high). Annual precipitation averages 1128 Millimeters. Fontanet is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.7 °C | 2.3 °C | 77.47 mm |
| February | -4.9 °C | 5.2 °C | 64.01 mm |
| March | 0.1 °C | 11.1 °C | 85.34 mm |
| April | 6 °C | 18 °C | 122.17 mm |
| May | 11.8 °C | 23.7 °C | 118.62 mm |
| June | 16.8 °C | 28.4 °C | 129.03 mm |
| July | 18.4 °C | 29.9 °C | 111 mm |
| August | 17.2 °C | 29.3 °C | 78.23 mm |
| September | 12.7 °C | 26.3 °C | 84.58 mm |
| October | 6.6 °C | 19.6 °C | 93.73 mm |
| November | 0.8 °C | 11.5 °C | 89.66 mm |
| December | -3.8 °C | 4.9 °C | 74.17 mm |
| Annual | 6.3 °C | 17.5 °C | 1128.01 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |