Oshkosh, Nebraska has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.4 °C (low) to 17.7 °C (high). Annual precipitation averages 461.8 Millimeters. Oshkosh is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.9 °C | 4.5 °C | 6.6 mm |
| February | -9.1 °C | 6.6 °C | 9.91 mm |
| March | -4.6 °C | 12.3 °C | 23.62 mm |
| April | 0.4 °C | 16.8 °C | 51.05 mm |
| May | 6.3 °C | 21.6 °C | 77.72 mm |
| June | 12.2 °C | 28.1 °C | 78.49 mm |
| July | 15.5 °C | 31.5 °C | 73.41 mm |
| August | 14.2 °C | 30.4 °C | 49.78 mm |
| September | 8.7 °C | 26.1 °C | 38.61 mm |
| October | 0.8 °C | 18.3 °C | 32 mm |
| November | -5.8 °C | 11.1 °C | 11.68 mm |
| December | -10.5 °C | 4.9 °C | 8.89 mm |
| Annual | 1.4 °C | 17.7 °C | 461.76 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |