Naper, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.2 °F (low) to 59.3 °F (high). Annual precipitation averages 26 Inches. Naper 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 | 11.2 °F | 32.0 °F | 0.54 in. |
| February | 14.7 °F | 36.3 °F | 0.72 in. |
| March | 23.8 °F | 47.3 °F | 1.27 in. |
| April | 34.5 °F | 57.8 °F | 3.04 in. |
| May | 45.6 °F | 69.2 °F | 3.93 in. |
| June | 56.6 °F | 79.2 °F | 4.07 in. |
| July | 62.3 °F | 86.4 °F | 3.09 in. |
| August | 60.0 °F | 84.2 °F | 3.08 in. |
| September | 50.5 °F | 76.0 °F | 2.65 in. |
| October | 36.8 °F | 61.5 °F | 2.13 in. |
| November | 24.3 °F | 46.9 °F | 0.8 in. |
| December | 14.6 °F | 34.5 °F | 0.71 in. |
| Annual | 36.2 °F | 59.3 °F | 26.03 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 | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |