Smithfield, 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 18.4 °C (high). Annual precipitation averages 1276.6 Millimeters. Smithfield is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.1 °C | 4.7 °C | 93.22 mm |
| February | -3.7 °C | 7.1 °C | 93.47 mm |
| March | 0.4 °C | 12.5 °C | 116.08 mm |
| April | 6.3 °C | 18.6 °C | 124.71 mm |
| May | 12.3 °C | 23.4 °C | 137.41 mm |
| June | 16.2 °C | 28.9 °C | 127.51 mm |
| July | 18.2 °C | 30.5 °C | 113.79 mm |
| August | 17.5 °C | 29.3 °C | 90.68 mm |
| September | 13.7 °C | 26.2 °C | 89.41 mm |
| October | 6.9 °C | 20.3 °C | 91.69 mm |
| November | 1.2 °C | 12.8 °C | 91.44 mm |
| December | -2.7 °C | 6.9 °C | 107.19 mm |
| Annual | 6.8 °C | 18.4 °C | 1276.6 mm |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.1 °C | 4.7 °C | 93.22 mm |
| February | -3.7 °C | 7.1 °C | 93.47 mm |
| March | 0.4 °C | 12.5 °C | 116.08 mm |
| April | 6.3 °C | 18.6 °C | 124.71 mm |
| May | 12.3 °C | 23.4 °C | 137.41 mm |
| June | 16.2 °C | 28.9 °C | 127.51 mm |
| July | 18.2 °C | 30.5 °C | 113.79 mm |
| August | 17.5 °C | 29.3 °C | 90.68 mm |
| September | 13.7 °C | 26.2 °C | 89.41 mm |
| October | 6.9 °C | 20.3 °C | 91.69 mm |
| November | 1.2 °C | 12.8 °C | 91.44 mm |
| December | -2.7 °C | 6.9 °C | 107.19 mm |
| Annual | 6.8 °C | 18.4 °C | 1276.6 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |