Trafalgar, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.4 °F (low) to 62.6 °F (high). Annual precipitation averages 46 Inches. Trafalgar 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 | 20.2 °F | 35.9 °F | 3.24 in. |
| February | 23.1 °F | 40.5 °F | 2.63 in. |
| March | 31.6 °F | 51.0 °F | 3.56 in. |
| April | 42.4 °F | 63.4 °F | 4.88 in. |
| May | 53.2 °F | 73.4 °F | 5.14 in. |
| June | 62.2 °F | 81.9 °F | 5.23 in. |
| July | 65.1 °F | 84.6 °F | 4.43 in. |
| August | 63.3 °F | 83.9 °F | 3.3 in. |
| September | 55.8 °F | 78.4 °F | 3.39 in. |
| October | 44.2 °F | 66.0 °F | 3.35 in. |
| November | 33.7 °F | 52.1 °F | 3.54 in. |
| December | 25.5 °F | 40.5 °F | 3.34 in. |
| Annual | 43.4 °F | 62.6 °F | 46.03 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |