Allen, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.6 °F (low) to 59.2 °F (high). Annual precipitation averages 29.3 Inches. Allen is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.1 °F | 29.6 °F | 0.63 in. |
| February | 14.0 °F | 34.1 °F | 0.77 in. |
| March | 23.9 °F | 46.4 °F | 1.52 in. |
| April | 35.0 °F | 59.3 °F | 3.24 in. |
| May | 47.5 °F | 71.2 °F | 3.98 in. |
| June | 58.7 °F | 80.9 °F | 4.83 in. |
| July | 62.7 °F | 84.8 °F | 3.07 in. |
| August | 60.2 °F | 82.3 °F | 3.53 in. |
| September | 50.7 °F | 76.5 °F | 2.91 in. |
| October | 37.8 °F | 63.6 °F | 2.47 in. |
| November | 24.4 °F | 47.4 °F | 1.41 in. |
| December | 14.4 °F | 34.2 °F | 0.95 in. |
| Annual | 36.6 °F | 59.2 °F | 29.31 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |