Trumbull, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.5 °F (low) to 62.3 °F (high). Annual precipitation averages 27.8 Inches. Trumbull 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 | 14.9 °F | 35.2 °F | 0.6 in. |
| February | 18.2 °F | 38.9 °F | 0.77 in. |
| March | 27.4 °F | 51.3 °F | 1.41 in. |
| April | 37.7 °F | 62.1 °F | 2.83 in. |
| May | 49.5 °F | 72.2 °F | 4.68 in. |
| June | 60.4 °F | 82.8 °F | 3.89 in. |
| July | 64.8 °F | 86.9 °F | 3.68 in. |
| August | 62.4 °F | 84.7 °F | 3.52 in. |
| September | 53.2 °F | 78.4 °F | 2.19 in. |
| October | 40.1 °F | 65.6 °F | 2.11 in. |
| November | 27.5 °F | 51.0 °F | 1.24 in. |
| December | 18.3 °F | 38.5 °F | 0.91 in. |
| Annual | 39.5 °F | 62.3 °F | 27.83 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |