Chalco, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.7 °F (low) to 61.7 °F (high). Annual precipitation averages 32.7 Inches. Chalco 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 | 14.1 °F | 32.7 °F | 0.83 in. |
| February | 18.0 °F | 37.6 °F | 1.12 in. |
| March | 28.5 °F | 50.2 °F | 1.8 in. |
| April | 39.4 °F | 62.7 °F | 3.28 in. |
| May | 51.4 °F | 72.6 °F | 4.87 in. |
| June | 62.0 °F | 82.9 °F | 5.08 in. |
| July | 66.4 °F | 86.5 °F | 3.35 in. |
| August | 64.0 °F | 84.5 °F | 4.02 in. |
| September | 54.2 °F | 78.1 °F | 3.06 in. |
| October | 41.7 °F | 65.2 °F | 2.59 in. |
| November | 29.0 °F | 49.8 °F | 1.42 in. |
| December | 19.1 °F | 37.1 °F | 1.31 in. |
| Annual | 40.7 °F | 61.7 °F | 32.73 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 |