Frankfort, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.4 °C (low) to 17.9 °C (high). Annual precipitation averages 845.3 Millimeters. Frankfort is located in USDA Plant Hardiness Zone 6a. 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 | -8.5 °C | 2.9 °C | 18.8 mm |
| February | -6.5 °C | 5.6 °C | 28.19 mm |
| March | -0.9 °C | 12.2 °C | 51.82 mm |
| April | 4.6 °C | 18.1 °C | 80.01 mm |
| May | 11.2 °C | 23.3 °C | 125.22 mm |
| June | 16.9 °C | 28.7 °C | 122.43 mm |
| July | 19.2 °C | 31.2 °C | 106.93 mm |
| August | 17.9 °C | 30.4 °C | 90.93 mm |
| September | 12.7 °C | 26.3 °C | 82.3 mm |
| October | 5.7 °C | 19.6 °C | 65.53 mm |
| November | -0.9 °C | 11.6 °C | 42.16 mm |
| December | -6.2 °C | 4.9 °C | 30.99 mm |
| Annual | 5.4 °C | 17.9 °C | 845.31 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |