Fontana, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.2 °C (low) to 19.1 °C (high). Annual precipitation averages 1043.7 Millimeters. Fontana is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.2 °C | 4.8 °C | 34.04 mm |
| February | -4.3 °C | 7.3 °C | 42.93 mm |
| March | 1 °C | 13.5 °C | 65.28 mm |
| April | 6.6 °C | 19.2 °C | 103.63 mm |
| May | 12.6 °C | 24 °C | 150.88 mm |
| June | 18.1 °C | 29.1 °C | 139.95 mm |
| July | 20.3 °C | 31.9 °C | 106.43 mm |
| August | 19.2 °C | 31.3 °C | 97.54 mm |
| September | 14.2 °C | 27.2 °C | 114.3 mm |
| October | 7.6 °C | 20.7 °C | 84.84 mm |
| November | 1.3 °C | 13.1 °C | 59.18 mm |
| December | -3.9 °C | 6.7 °C | 44.7 mm |
| Annual | 7.2 °C | 19.1 °C | 1043.7 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°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 |