Spring Hill, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 21.1 °C (high). Annual precipitation averages 1399 Millimeters. Spring Hill is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.4 °C | 8.4 °C | 115.32 mm |
| February | -0.9 °C | 11.1 °C | 123.44 mm |
| March | 2.9 °C | 15.9 °C | 132.08 mm |
| April | 7.3 °C | 21.4 °C | 129.79 mm |
| May | 12.8 °C | 25.9 °C | 134.87 mm |
| June | 17.6 °C | 30 °C | 119.63 mm |
| July | 19.6 °C | 31.8 °C | 119.38 mm |
| August | 18.7 °C | 31.6 °C | 92.2 mm |
| September | 14.7 °C | 28.4 °C | 103.63 mm |
| October | 8.2 °C | 22.4 °C | 90.68 mm |
| November | 2.3 °C | 15.7 °C | 97.79 mm |
| December | -0.7 °C | 10.3 °C | 140.21 mm |
| Annual | 8.3 °C | 21.1 °C | 1399.02 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |