Sandborn, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.5 °F (low) to 65.2 °F (high). Annual precipitation averages 47.1 Inches. Sandborn 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 | 22.2 °F | 38.5 °F | 3.37 in. |
| February | 24.9 °F | 43.3 °F | 2.61 in. |
| March | 33.5 °F | 54.1 °F | 3.7 in. |
| April | 43.8 °F | 66.6 °F | 4.92 in. |
| May | 54.6 °F | 75.8 °F | 5.42 in. |
| June | 63.2 °F | 84.0 °F | 4.89 in. |
| July | 65.8 °F | 87.0 °F | 4.28 in. |
| August | 63.8 °F | 86.1 °F | 3.19 in. |
| September | 56.2 °F | 80.7 °F | 3.76 in. |
| October | 44.7 °F | 68.9 °F | 3.55 in. |
| November | 34.6 °F | 54.4 °F | 3.92 in. |
| December | 26.7 °F | 42.9 °F | 3.44 in. |
| Annual | 44.5 °F | 65.2 °F | 47.05 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 |