Unity, Oregon has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 29.6 °F (low) to 58.9 °F (high). Annual precipitation averages 10.7 Inches. 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 | 15.9 °F | 35.0 °F | 1.26 in. |
| February | 18.4 °F | 40.8 °F | 0.72 in. |
| March | 23.8 °F | 48.9 °F | 0.74 in. |
| April | 28.3 °F | 56.3 °F | 0.92 in. |
| May | 34.8 °F | 65.3 °F | 1.42 in. |
| June | 40.2 °F | 73.7 °F | 1.17 in. |
| July | 45.2 °F | 85.7 °F | 0.49 in. |
| August | 44.0 °F | 85.4 °F | 0.42 in. |
| September | 36.8 °F | 75.8 °F | 0.4 in. |
| October | 28.9 °F | 61.2 °F | 0.76 in. |
| November | 22.4 °F | 44.5 °F | 1.12 in. |
| December | 16.1 °F | 34.2 °F | 1.23 in. |
| Annual | 29.6 °F | 58.9 °F | 10.65 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |