Norman, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.8 °F (low) to 62.9 °F (high). Annual precipitation averages 26.2 Inches. Norman is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.9 °F | 36.2 °F | 0.52 in. |
| February | 17.8 °F | 40.1 °F | 0.68 in. |
| March | 26.9 °F | 51.9 °F | 1.43 in. |
| April | 37.1 °F | 62.4 °F | 2.48 in. |
| May | 48.5 °F | 72.5 °F | 4.33 in. |
| June | 59.5 °F | 83.3 °F | 3.84 in. |
| July | 64.3 °F | 87.9 °F | 3.79 in. |
| August | 61.9 °F | 85.5 °F | 3.25 in. |
| September | 52.4 °F | 78.9 °F | 1.98 in. |
| October | 39.0 °F | 65.9 °F | 2.05 in. |
| November | 26.3 °F | 51.3 °F | 1.07 in. |
| December | 17.5 °F | 39.2 °F | 0.75 in. |
| Annual | 38.8 °F | 62.9 °F | 26.17 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |