Vallonia, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.9 °F (low) to 64.7 °F (high). Annual precipitation averages 49.1 Inches. Vallonia 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.7 °F | 38.9 °F | 3.69 in. |
| February | 23.9 °F | 43.6 °F | 2.92 in. |
| March | 31.6 °F | 53.8 °F | 4.15 in. |
| April | 41.6 °F | 66.1 °F | 5.4 in. |
| May | 52.6 °F | 75.0 °F | 5.38 in. |
| June | 61.3 °F | 82.8 °F | 4.96 in. |
| July | 64.5 °F | 85.8 °F | 4.08 in. |
| August | 62.5 °F | 85.4 °F | 3.8 in. |
| September | 54.5 °F | 79.6 °F | 3.4 in. |
| October | 42.3 °F | 67.9 °F | 3.63 in. |
| November | 33.0 °F | 54.4 °F | 3.95 in. |
| December | 25.6 °F | 43.2 °F | 3.74 in. |
| Annual | 42.9 °F | 64.7 °F | 49.1 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |