Tolu, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.6 °C (low) to 19.7 °C (high). Annual precipitation averages 1236.5 Millimeters. Tolu 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 5.7 °C | 94.23 mm |
| February | -1.9 °C | 8.6 °C | 88.65 mm |
| March | 2.6 °C | 13.9 °C | 117.09 mm |
| April | 7.9 °C | 20.3 °C | 131.06 mm |
| May | 13.8 °C | 25.2 °C | 135.89 mm |
| June | 18.5 °C | 29.8 °C | 113.79 mm |
| July | 20.6 °C | 31.4 °C | 106.17 mm |
| August | 19.4 °C | 30.8 °C | 76.2 mm |
| September | 15.3 °C | 27.8 °C | 80.01 mm |
| October | 8.8 °C | 21.4 °C | 85.85 mm |
| November | 2.6 °C | 13.9 °C | 101.85 mm |
| December | -1.6 °C | 8 °C | 105.66 mm |
| Annual | 8.6 °C | 19.7 °C | 1236.45 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |