Hoquiam, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.6 °C (low) to 14.8 °C (high). Annual precipitation averages 2134.6 Millimeters. Hoquiam is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.1 °C | 8.7 °C | 354.84 mm |
| February | 2.6 °C | 10 °C | 186.18 mm |
| March | 3.6 °C | 11.6 °C | 235.71 mm |
| April | 4.9 °C | 13.8 °C | 169.16 mm |
| May | 7.6 °C | 16.7 °C | 82.8 mm |
| June | 9.8 °C | 18.6 °C | 58.67 mm |
| July | 11.6 °C | 21 °C | 24.64 mm |
| August | 11.6 °C | 21.7 °C | 37.08 mm |
| September | 10.1 °C | 20.6 °C | 75.69 mm |
| October | 7 °C | 15.9 °C | 218.44 mm |
| November | 4.3 °C | 11.2 °C | 348.23 mm |
| December | 2.7 °C | 8.3 °C | 343.15 mm |
| Annual | 6.6 °C | 14.8 °C | 2134.59 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |