Oak, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 17.8 °C (high). Annual precipitation averages 712.7 Millimeters. Oak is located in USDA Plant Hardiness Zone 6a. 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 | -9.2 °C | 2.6 °C | 16.76 mm |
| February | -7.3 °C | 5.2 °C | 19.81 mm |
| March | -2.1 °C | 11.9 °C | 37.59 mm |
| April | 3.6 °C | 17.9 °C | 64.01 mm |
| May | 10 °C | 23.3 °C | 115.82 mm |
| June | 16.1 °C | 29.2 °C | 100.58 mm |
| July | 18.6 °C | 31.5 °C | 103.89 mm |
| August | 17.3 °C | 30.2 °C | 86.61 mm |
| September | 12.1 °C | 26.4 °C | 59.94 mm |
| October | 4.9 °C | 19.5 °C | 53.85 mm |
| November | -2.2 °C | 11.2 °C | 31.24 mm |
| December | -7.2 °C | 4.4 °C | 22.61 mm |
| Annual | 4.6 °C | 17.8 °C | 712.71 mm |
| 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |