Riverdale, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.1 °F (low) to 62.5 °F (high). Annual precipitation averages 25.5 Inches. Riverdale 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 | 14.7 °F | 36.4 °F | 0.48 in. |
| February | 17.6 °F | 40.3 °F | 0.63 in. |
| March | 26.4 °F | 51.8 °F | 1.42 in. |
| April | 36.5 °F | 62.0 °F | 2.63 in. |
| May | 47.4 °F | 71.8 °F | 4.25 in. |
| June | 58.5 °F | 82.6 °F | 3.86 in. |
| July | 63.3 °F | 87.1 °F | 3.48 in. |
| August | 60.9 °F | 84.7 °F | 3.14 in. |
| September | 51.3 °F | 78.3 °F | 1.92 in. |
| October | 37.9 °F | 65.4 °F | 1.98 in. |
| November | 25.5 °F | 51.0 °F | 0.98 in. |
| December | 16.8 °F | 39.0 °F | 0.69 in. |
| Annual | 38.1 °F | 62.5 °F | 25.46 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |