Oakley, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.8 °C (low) to 16.1 °C (high). Annual precipitation averages 312.2 Millimeters. Oakley is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.8 °C | 3.1 °C | 22.86 mm |
| February | -5.2 °C | 5.7 °C | 19.05 mm |
| March | -2.1 °C | 10.9 °C | 28.96 mm |
| April | 0.4 °C | 14.8 °C | 38.1 mm |
| May | 4.7 °C | 19.7 °C | 53.34 mm |
| June | 8.3 °C | 24.8 °C | 28.45 mm |
| July | 12.6 °C | 30.2 °C | 17.53 mm |
| August | 11.7 °C | 29.9 °C | 18.29 mm |
| September | 7.1 °C | 24.7 °C | 23.37 mm |
| October | 1.7 °C | 17.4 °C | 23.11 mm |
| November | -3.4 °C | 8.9 °C | 19.05 mm |
| December | -7 °C | 3.1 °C | 20.07 mm |
| Annual | 1.8 °C | 16.1 °C | 312.18 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |