Vernon, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.7 °F (low) to 64.6 °F (high). Annual precipitation averages 49.7 Inches. Vernon is located in USDA Plant Hardiness Zone 6b. 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 | 22.4 °F | 39.0 °F | 3.43 in. |
| February | 24.7 °F | 43.4 °F | 2.99 in. |
| March | 32.8 °F | 54.1 °F | 4.29 in. |
| April | 42.7 °F | 66.4 °F | 5.19 in. |
| May | 53.1 °F | 74.9 °F | 5.2 in. |
| June | 61.3 °F | 82.3 °F | 5.27 in. |
| July | 64.8 °F | 85.3 °F | 4.55 in. |
| August | 63.0 °F | 84.7 °F | 4.15 in. |
| September | 55.5 °F | 79.4 °F | 3.5 in. |
| October | 43.8 °F | 68.1 °F | 3.54 in. |
| November | 34.2 °F | 54.6 °F | 3.85 in. |
| December | 26.6 °F | 43.2 °F | 3.77 in. |
| Annual | 43.7 °F | 64.6 °F | 49.73 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |