Ashton, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.2 °F (low) to 61.9 °F (high). Annual precipitation averages 26.8 Inches. Ashton 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 | 12.5 °F | 35.4 °F | 0.54 in. |
| February | 15.9 °F | 39.2 °F | 0.65 in. |
| March | 25.4 °F | 51.0 °F | 1.54 in. |
| April | 35.6 °F | 61.7 °F | 2.97 in. |
| May | 46.9 °F | 71.4 °F | 4.24 in. |
| June | 58.0 °F | 82.0 °F | 4.08 in. |
| July | 63.0 °F | 86.8 °F | 3.33 in. |
| August | 60.6 °F | 84.7 °F | 3.3 in. |
| September | 50.6 °F | 77.6 °F | 2.24 in. |
| October | 37.1 °F | 64.6 °F | 2.0 in. |
| November | 24.8 °F | 50.0 °F | 1.07 in. |
| December | 15.7 °F | 37.9 °F | 0.8 in. |
| Annual | 37.2 °F | 61.9 °F | 26.76 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 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |