Springfield, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.4 °F (low) to 66.7 °F (high). Annual precipitation averages 50.5 Inches. Springfield is located in USDA Plant Hardiness Zone 7a. 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 | 25.0 °F | 43.0 °F | 3.66 in. |
| February | 27.9 °F | 47.3 °F | 3.71 in. |
| March | 34.4 °F | 56.2 °F | 4.86 in. |
| April | 44.1 °F | 66.9 °F | 4.57 in. |
| May | 54.4 °F | 75.7 °F | 5.43 in. |
| June | 62.3 °F | 84.1 °F | 5.12 in. |
| July | 65.7 °F | 86.8 °F | 4.57 in. |
| August | 64.2 °F | 86.3 °F | 3.51 in. |
| September | 57.0 °F | 80.9 °F | 3.88 in. |
| October | 45.5 °F | 69.9 °F | 3.36 in. |
| November | 35.0 °F | 56.5 °F | 3.38 in. |
| December | 28.9 °F | 46.3 °F | 4.46 in. |
| Annual | 45.4 °F | 66.7 °F | 50.51 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |