Hamlet, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.7 °F (low) to 59.4 °F (high). Annual precipitation averages 40.7 Inches. Hamlet 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 | 16.1 °F | 31.8 °F | 2.58 in. |
| February | 18.9 °F | 35.7 °F | 2.28 in. |
| March | 27.3 °F | 46.9 °F | 2.45 in. |
| April | 37.7 °F | 59.4 °F | 3.62 in. |
| May | 49.6 °F | 70.7 °F | 4.35 in. |
| June | 59.5 °F | 79.9 °F | 4.43 in. |
| July | 61.6 °F | 82.6 °F | 4.43 in. |
| August | 59.5 °F | 80.9 °F | 4.22 in. |
| September | 51.9 °F | 75.7 °F | 3.42 in. |
| October | 41.1 °F | 63.4 °F | 3.5 in. |
| November | 31.3 °F | 48.9 °F | 2.95 in. |
| December | 22.4 °F | 37.2 °F | 2.44 in. |
| Annual | 39.7 °F | 59.4 °F | 40.67 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |