Plano, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 20.2 °C (high). Annual precipitation averages 1331.7 Millimeters. Plano is located in USDA Plant Hardiness Zone 7a. 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 | -3 °C | 7.1 °C | 97.79 mm |
| February | -1.6 °C | 9.6 °C | 109.47 mm |
| March | 2.4 °C | 14.7 °C | 125.48 mm |
| April | 7.6 °C | 20.6 °C | 125.73 mm |
| May | 13.3 °C | 25.2 °C | 135.89 mm |
| June | 17.8 °C | 29.8 °C | 122.17 mm |
| July | 19.8 °C | 31.5 °C | 115.82 mm |
| August | 18.8 °C | 30.9 °C | 89.66 mm |
| September | 14.8 °C | 27.8 °C | 98.3 mm |
| October | 8.1 °C | 21.8 °C | 92.96 mm |
| November | 2.2 °C | 14.6 °C | 95.76 mm |
| December | -0.9 °C | 9 °C | 122.68 mm |
| Annual | 8.3 °C | 20.2 °C | 1331.71 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 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 |