Hyannis, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.6 °F (low) to 60.9 °F (high). Annual precipitation averages 20.1 Inches. Hyannis 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 | 14.0 °F | 37.3 °F | 0.39 in. |
| February | 15.5 °F | 39.7 °F | 0.49 in. |
| March | 24.0 °F | 50.3 °F | 1.07 in. |
| April | 32.2 °F | 58.0 °F | 2.26 in. |
| May | 42.6 °F | 68.7 °F | 3.08 in. |
| June | 53.1 °F | 80.0 °F | 3.23 in. |
| July | 59.1 °F | 86.8 °F | 2.9 in. |
| August | 56.6 °F | 84.5 °F | 2.41 in. |
| September | 46.9 °F | 76.4 °F | 1.56 in. |
| October | 33.8 °F | 62.5 °F | 1.74 in. |
| November | 22.9 °F | 49.1 °F | 0.55 in. |
| December | 14.7 °F | 38.0 °F | 0.43 in. |
| Annual | 34.6 °F | 60.9 °F | 20.11 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 | Exceptional Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |