Cowles, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.9 °F (low) to 63.4 °F (high). Annual precipitation averages 26.2 Inches. Cowles is located in USDA Plant Hardiness Zone 5b. 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 | 14.2 °F | 36.5 °F | 0.54 in. |
| February | 17.5 °F | 40.7 °F | 0.69 in. |
| March | 26.7 °F | 52.6 °F | 1.38 in. |
| April | 37.2 °F | 62.9 °F | 2.38 in. |
| May | 48.8 °F | 72.9 °F | 4.37 in. |
| June | 60.0 °F | 84.0 °F | 3.74 in. |
| July | 64.7 °F | 88.7 °F | 3.87 in. |
| August | 62.4 °F | 86.1 °F | 3.3 in. |
| September | 52.4 °F | 79.2 °F | 2.04 in. |
| October | 39.3 °F | 66.5 °F | 2.01 in. |
| November | 26.5 °F | 51.7 °F | 1.11 in. |
| December | 17.2 °F | 39.4 °F | 0.76 in. |
| Annual | 38.9 °F | 63.4 °F | 26.19 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |