Staunton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17.4 °C (high). Annual precipitation averages 1143 Millimeters. Staunton is located in USDA Plant Hardiness Zone 6a. 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 | -6.6 °C | 2.3 °C | 78.74 mm |
| February | -4.9 °C | 5.2 °C | 62.74 mm |
| March | 0.1 °C | 11.1 °C | 86.61 mm |
| April | 5.9 °C | 17.8 °C | 125.48 mm |
| May | 11.7 °C | 23.6 °C | 118.11 mm |
| June | 16.7 °C | 28.2 °C | 132.08 mm |
| July | 18.3 °C | 29.7 °C | 112.01 mm |
| August | 17.1 °C | 29.1 °C | 77.22 mm |
| September | 12.8 °C | 26.2 °C | 88.9 mm |
| October | 6.5 °C | 19.3 °C | 94.49 mm |
| November | 0.8 °C | 11.4 °C | 90.68 mm |
| December | -3.8 °C | 4.9 °C | 75.95 mm |
| Annual | 6.2 °C | 17.4 °C | 1143.01 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |