Byron, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.4 °F (low) to 64.3 °F (high). Annual precipitation averages 28.8 Inches. Byron 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 | 15.6 °F | 37.5 °F | 0.67 in. |
| February | 19.2 °F | 42.3 °F | 0.83 in. |
| March | 28.4 °F | 53.7 °F | 1.52 in. |
| April | 38.8 °F | 64.3 °F | 2.58 in. |
| May | 50.1 °F | 73.9 °F | 4.57 in. |
| June | 61.3 °F | 84.6 °F | 4.15 in. |
| July | 65.6 °F | 89.2 °F | 4.23 in. |
| August | 63.3 °F | 86.7 °F | 3.41 in. |
| September | 53.6 °F | 79.8 °F | 2.56 in. |
| October | 41.2 °F | 67.2 °F | 2.12 in. |
| November | 28.7 °F | 52.5 °F | 1.24 in. |
| December | 19.3 °F | 40.4 °F | 0.95 in. |
| Annual | 40.4 °F | 64.3 °F | 28.83 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |