Osceola, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.2 °F (low) to 61.8 °F (high). Annual precipitation averages 28.3 Inches. Osceola 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.9 °F | 34.1 °F | 0.65 in. |
| February | 17.5 °F | 38.4 °F | 0.75 in. |
| March | 27.2 °F | 50.8 °F | 1.58 in. |
| April | 37.5 °F | 62.3 °F | 2.85 in. |
| May | 49.6 °F | 72.6 °F | 4.87 in. |
| June | 60.3 °F | 82.4 °F | 4.13 in. |
| July | 64.6 °F | 86.0 °F | 3.12 in. |
| August | 62.1 °F | 83.9 °F | 3.4 in. |
| September | 52.9 °F | 77.9 °F | 2.45 in. |
| October | 40.0 °F | 65.0 °F | 2.16 in. |
| November | 27.1 °F | 50.3 °F | 1.3 in. |
| December | 17.4 °F | 37.3 °F | 1.03 in. |
| Annual | 39.2 °F | 61.8 °F | 28.29 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |