Grandview, Indiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.6 °F (low) to 67.5 °F (high). Annual precipitation averages 49.4 Inches. Grandview is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.4 °F | 42.2 °F | 3.6 in. |
| February | 27.4 °F | 46.8 °F | 3.58 in. |
| March | 35.3 °F | 56.4 °F | 4.52 in. |
| April | 45.4 °F | 68.3 °F | 5.01 in. |
| May | 56.1 °F | 77.7 °F | 5.29 in. |
| June | 64.5 °F | 85.6 °F | 4.59 in. |
| July | 68.0 °F | 88.4 °F | 4.24 in. |
| August | 65.8 °F | 88.0 °F | 3.07 in. |
| September | 58.4 °F | 82.4 °F | 3.65 in. |
| October | 46.7 °F | 71.0 °F | 3.69 in. |
| November | 36.5 °F | 56.8 °F | 3.93 in. |
| December | 29.2 °F | 46.3 °F | 4.27 in. |
| Annual | 46.6 °F | 67.5 °F | 49.44 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |