Roca, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.6 °F (low) to 62.7 °F (high). Annual precipitation averages 31.5 Inches. Roca is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.9 °F | 34.5 °F | 0.76 in. |
| February | 19.8 °F | 39.4 °F | 0.98 in. |
| March | 28.9 °F | 51.2 °F | 1.72 in. |
| April | 40.2 °F | 62.7 °F | 2.88 in. |
| May | 50.7 °F | 73.1 °F | 5.42 in. |
| June | 61.7 °F | 83.4 °F | 4.67 in. |
| July | 65.7 °F | 87.3 °F | 3.84 in. |
| August | 63.3 °F | 85.9 °F | 3.35 in. |
| September | 54.0 °F | 79.0 °F | 2.93 in. |
| October | 41.2 °F | 66.3 °F | 2.37 in. |
| November | 28.5 °F | 50.8 °F | 1.43 in. |
| December | 18.8 °F | 38.4 °F | 1.15 in. |
| Annual | 40.6 °F | 62.7 °F | 31.5 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |