Haines, Oregon has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.7 °F (low) to 59.6 °F (high). Annual precipitation averages 10.8 Inches. Haines is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.8 °F | 35.8 °F | 1.0 in. |
| February | 22.3 °F | 41.6 °F | 0.76 in. |
| March | 27.1 °F | 50.4 °F | 1.04 in. |
| April | 31.0 °F | 57.6 °F | 0.86 in. |
| May | 37.9 °F | 66.3 °F | 1.63 in. |
| June | 42.9 °F | 73.5 °F | 1.15 in. |
| July | 47.9 °F | 84.9 °F | 0.61 in. |
| August | 46.6 °F | 85.5 °F | 0.41 in. |
| September | 39.8 °F | 76.2 °F | 0.5 in. |
| October | 31.7 °F | 61.5 °F | 0.69 in. |
| November | 25.6 °F | 45.8 °F | 0.93 in. |
| December | 19.7 °F | 35.8 °F | 1.25 in. |
| Annual | 32.7 °F | 59.6 °F | 10.83 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |