Highland, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.9 °F (low) to 59.7 °F (high). Annual precipitation averages 40.3 Inches. Highland is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.0 °F | 32.5 °F | 2.27 in. |
| February | 20.5 °F | 36.3 °F | 2.15 in. |
| March | 29.4 °F | 46.8 °F | 2.36 in. |
| April | 39.4 °F | 59.1 °F | 3.76 in. |
| May | 50.1 °F | 69.8 °F | 4.33 in. |
| June | 60.1 °F | 79.6 °F | 4.69 in. |
| July | 64.9 °F | 83.6 °F | 4.26 in. |
| August | 63.4 °F | 82.0 °F | 4.21 in. |
| September | 55.8 °F | 76.2 °F | 3.37 in. |
| October | 44.2 °F | 63.5 °F | 3.7 in. |
| November | 33.4 °F | 49.5 °F | 2.89 in. |
| December | 23.6 °F | 37.6 °F | 2.35 in. |
| Annual | 41.9 °F | 59.7 °F | 40.34 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |