Smithfield, Kentucky has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.2 °F (low) to 65.2 °F (high). Annual precipitation averages 50.3 Inches. 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 | 22.8 °F | 40.5 °F | 3.67 in. |
| February | 25.4 °F | 44.8 °F | 3.68 in. |
| March | 32.8 °F | 54.5 °F | 4.57 in. |
| April | 43.3 °F | 65.5 °F | 4.91 in. |
| May | 54.1 °F | 74.2 °F | 5.41 in. |
| June | 61.1 °F | 84.1 °F | 5.02 in. |
| July | 64.8 °F | 86.9 °F | 4.48 in. |
| August | 63.5 °F | 84.7 °F | 3.57 in. |
| September | 56.6 °F | 79.2 °F | 3.52 in. |
| October | 44.4 °F | 68.6 °F | 3.61 in. |
| November | 34.2 °F | 55.0 °F | 3.6 in. |
| December | 27.2 °F | 44.4 °F | 4.22 in. |
| Annual | 44.2 °F | 65.2 °F | 50.26 in. |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.8 °F | 40.5 °F | 3.67 in. |
| February | 25.4 °F | 44.8 °F | 3.68 in. |
| March | 32.8 °F | 54.5 °F | 4.57 in. |
| April | 43.3 °F | 65.5 °F | 4.91 in. |
| May | 54.1 °F | 74.2 °F | 5.41 in. |
| June | 61.1 °F | 84.1 °F | 5.02 in. |
| July | 64.8 °F | 86.9 °F | 4.48 in. |
| August | 63.5 °F | 84.7 °F | 3.57 in. |
| September | 56.6 °F | 79.2 °F | 3.52 in. |
| October | 44.4 °F | 68.6 °F | 3.61 in. |
| November | 34.2 °F | 55.0 °F | 3.6 in. |
| December | 27.2 °F | 44.4 °F | 4.22 in. |
| Annual | 44.2 °F | 65.2 °F | 50.26 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |