Hidden Valley, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.4 °F (low) to 64.6 °F (high). Annual precipitation averages 45.5 Inches. Hidden Valley 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 | 23.0 °F | 39.3 °F | 3.42 in. |
| February | 25.2 °F | 43.5 °F | 2.83 in. |
| March | 33.0 °F | 53.3 °F | 4.0 in. |
| April | 42.9 °F | 65.6 °F | 4.74 in. |
| May | 53.3 °F | 74.4 °F | 4.97 in. |
| June | 62.1 °F | 82.9 °F | 4.66 in. |
| July | 65.7 °F | 86.1 °F | 4.01 in. |
| August | 64.3 °F | 85.4 °F | 3.33 in. |
| September | 56.6 °F | 79.4 °F | 3.19 in. |
| October | 44.7 °F | 67.4 °F | 3.28 in. |
| November | 34.6 °F | 54.1 °F | 3.38 in. |
| December | 27.9 °F | 43.5 °F | 3.7 in. |
| Annual | 44.4 °F | 64.6 °F | 45.51 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |