Haines, Oregon has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.4 °C (low) to 15.3 °C (high). Annual precipitation averages 275.1 Millimeters. 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 | -6.8 °C | 2.1 °C | 25.4 mm |
| February | -5.4 °C | 5.3 °C | 19.3 mm |
| March | -2.7 °C | 10.2 °C | 26.42 mm |
| April | -0.6 °C | 14.2 °C | 21.84 mm |
| May | 3.3 °C | 19.1 °C | 41.4 mm |
| June | 6.1 °C | 23.1 °C | 29.21 mm |
| July | 8.8 °C | 29.4 °C | 15.49 mm |
| August | 8.1 °C | 29.7 °C | 10.41 mm |
| September | 4.3 °C | 24.6 °C | 12.7 mm |
| October | -0.2 °C | 16.4 °C | 17.53 mm |
| November | -3.6 °C | 7.7 °C | 23.62 mm |
| December | -6.8 °C | 2.1 °C | 31.75 mm |
| Annual | 0.4 °C | 15.3 °C | 275.07 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |