Sparta, Kentucky has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.8 °C (low) to 18.7 °C (high). Annual precipitation averages 1203.2 Millimeters. Sparta is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 4.9 °C | 87.63 mm |
| February | -3.7 °C | 7.4 °C | 79.25 mm |
| March | 0.4 °C | 12.7 °C | 106.68 mm |
| April | 5.9 °C | 19.5 °C | 118.36 mm |
| May | 11.6 °C | 24.3 °C | 135.64 mm |
| June | 16.2 °C | 28.4 °C | 124.21 mm |
| July | 18.6 °C | 30.2 °C | 109.73 mm |
| August | 18 °C | 29.7 °C | 89.66 mm |
| September | 13.8 °C | 26.6 °C | 83.57 mm |
| October | 6.9 °C | 20.3 °C | 85.09 mm |
| November | 1.3 °C | 13.3 °C | 86.11 mm |
| December | -2.4 °C | 7.4 °C | 97.28 mm |
| Annual | 6.8 °C | 18.7 °C | 1203.21 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |