Mount Hood, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 3.3 °C (low) to 15.5 °C (high). Annual precipitation averages 885.9 Millimeters. Mount Hood is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.3 °C | 4.6 °C | 146.05 mm |
| February | -1.6 °C | 7.2 °C | 98.04 mm |
| March | -0.1 °C | 10.8 °C | 91.69 mm |
| April | 2.2 °C | 14.5 °C | 61.47 mm |
| May | 5.2 °C | 19.1 °C | 42.67 mm |
| June | 7.8 °C | 22.4 °C | 26.16 mm |
| July | 10.3 °C | 27.5 °C | 6.1 mm |
| August | 10.3 °C | 27.4 °C | 8.13 mm |
| September | 7.1 °C | 23.6 °C | 20.57 mm |
| October | 3.2 °C | 16.1 °C | 79.5 mm |
| November | 0 °C | 8.6 °C | 137.67 mm |
| December | -2.3 °C | 4.2 °C | 167.89 mm |
| Annual | 3.3 °C | 15.5 °C | 885.94 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |