Baker City, Oregon has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.2 °F (low) to 59.8 °F (high). Annual precipitation averages 12.3 Inches. Baker City is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.9 °F | 35.4 °F | 1.18 in. |
| February | 21.6 °F | 41.5 °F | 0.88 in. |
| March | 26.3 °F | 50.6 °F | 1.14 in. |
| April | 30.3 °F | 58.0 °F | 1.01 in. |
| May | 37.3 °F | 66.7 °F | 1.81 in. |
| June | 42.8 °F | 74.2 °F | 1.33 in. |
| July | 48.2 °F | 85.6 °F | 0.75 in. |
| August | 47.0 °F | 85.9 °F | 0.47 in. |
| September | 39.6 °F | 76.6 °F | 0.45 in. |
| October | 31.2 °F | 61.8 °F | 0.8 in. |
| November | 24.8 °F | 45.6 °F | 1.08 in. |
| December | 18.8 °F | 35.5 °F | 1.43 in. |
| Annual | 32.2 °F | 59.8 °F | 12.33 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |