Dunreith, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.1 °F (low) to 61 °F (high). Annual precipitation averages 46.2 Inches. Dunreith 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 | 18.5 °F | 34.4 °F | 3.41 in. |
| February | 21.0 °F | 38.4 °F | 2.54 in. |
| March | 29.4 °F | 49.0 °F | 3.63 in. |
| April | 39.8 °F | 61.8 °F | 4.72 in. |
| May | 50.9 °F | 71.8 °F | 5.19 in. |
| June | 60.0 °F | 80.3 °F | 5.45 in. |
| July | 62.5 °F | 83.1 °F | 4.41 in. |
| August | 60.5 °F | 82.0 °F | 3.38 in. |
| September | 53.0 °F | 76.9 °F | 3.33 in. |
| October | 41.9 °F | 65.0 °F | 3.32 in. |
| November | 32.1 °F | 50.8 °F | 3.58 in. |
| December | 24.0 °F | 39.0 °F | 3.25 in. |
| Annual | 41.1 °F | 61 °F | 46.21 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 |