Rossville, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 61.6 °F (high). Annual precipitation averages 41.5 Inches. Rossville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.6 °F | 33.9 °F | 2.71 in. |
| February | 21.1 °F | 37.8 °F | 2.24 in. |
| March | 30.2 °F | 49.4 °F | 2.92 in. |
| April | 40.7 °F | 62.6 °F | 3.93 in. |
| May | 51.9 °F | 73.3 °F | 4.41 in. |
| June | 60.9 °F | 81.6 °F | 5.02 in. |
| July | 63.9 °F | 84.2 °F | 4.66 in. |
| August | 61.9 °F | 83.0 °F | 3.63 in. |
| September | 54.4 °F | 78.2 °F | 3.09 in. |
| October | 43.2 °F | 65.7 °F | 3.07 in. |
| November | 33.2 °F | 50.9 °F | 3.21 in. |
| December | 24.4 °F | 38.8 °F | 2.57 in. |
| Annual | 42 °F | 61.6 °F | 41.46 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |