Clarkson, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.9 °F (low) to 60.2 °F (high). Annual precipitation averages 29.1 Inches. Clarkson is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.8 °F | 31.7 °F | 0.63 in. |
| February | 15.7 °F | 36.1 °F | 0.78 in. |
| March | 25.8 °F | 48.6 °F | 1.48 in. |
| April | 36.7 °F | 60.9 °F | 2.97 in. |
| May | 48.6 °F | 71.8 °F | 4.68 in. |
| June | 59.6 °F | 81.7 °F | 4.71 in. |
| July | 63.7 °F | 85.3 °F | 3.27 in. |
| August | 61.2 °F | 82.9 °F | 3.46 in. |
| September | 51.7 °F | 76.5 °F | 2.79 in. |
| October | 38.6 °F | 63.6 °F | 2.3 in. |
| November | 25.6 °F | 48.1 °F | 1.16 in. |
| December | 15.9 °F | 35.1 °F | 0.89 in. |
| Annual | 37.9 °F | 60.2 °F | 29.12 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |