Dunbar, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.5 °F (low) to 62.3 °F (high). Annual precipitation averages 32.8 Inches. Dunbar 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 | 14.5 °F | 33.6 °F | 0.8 in. |
| February | 18.4 °F | 38.6 °F | 1.04 in. |
| March | 28.9 °F | 51.4 °F | 1.84 in. |
| April | 39.5 °F | 63.2 °F | 3.12 in. |
| May | 51.2 °F | 73.2 °F | 5.41 in. |
| June | 61.6 °F | 82.7 °F | 4.73 in. |
| July | 65.8 °F | 86.4 °F | 4.12 in. |
| August | 63.1 °F | 84.8 °F | 3.35 in. |
| September | 53.7 °F | 78.4 °F | 3.04 in. |
| October | 41.4 °F | 66.5 °F | 2.59 in. |
| November | 28.7 °F | 50.7 °F | 1.5 in. |
| December | 18.9 °F | 38.3 °F | 1.21 in. |
| Annual | 40.5 °F | 62.3 °F | 32.75 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 |