Unity, Oregon has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.3 °C (low) to 14.9 °C (high). Annual precipitation averages 270.5 Millimeters. Unity is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | 1.7 °C | 32 mm |
| February | -7.6 °C | 4.9 °C | 18.29 mm |
| March | -4.6 °C | 9.4 °C | 18.8 mm |
| April | -2.1 °C | 13.5 °C | 23.37 mm |
| May | 1.6 °C | 18.5 °C | 36.07 mm |
| June | 4.6 °C | 23.2 °C | 29.72 mm |
| July | 7.3 °C | 29.8 °C | 12.45 mm |
| August | 6.7 °C | 29.7 °C | 10.67 mm |
| September | 2.7 °C | 24.3 °C | 10.16 mm |
| October | -1.7 °C | 16.2 °C | 19.3 mm |
| November | -5.3 °C | 6.9 °C | 28.45 mm |
| December | -8.8 °C | 1.2 °C | 31.24 mm |
| Annual | -1.3 °C | 14.9 °C | 270.52 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |