Hoquiam, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.8 °F (low) to 58.7 °F (high). Annual precipitation averages 84 Inches. 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 | 37.5 °F | 47.7 °F | 13.97 in. |
| February | 36.7 °F | 50.0 °F | 7.33 in. |
| March | 38.4 °F | 52.8 °F | 9.28 in. |
| April | 40.8 °F | 56.8 °F | 6.66 in. |
| May | 45.7 °F | 62.1 °F | 3.26 in. |
| June | 49.7 °F | 65.5 °F | 2.31 in. |
| July | 52.8 °F | 69.8 °F | 0.97 in. |
| August | 52.8 °F | 71.0 °F | 1.46 in. |
| September | 50.1 °F | 69.0 °F | 2.98 in. |
| October | 44.6 °F | 60.7 °F | 8.6 in. |
| November | 39.7 °F | 52.1 °F | 13.71 in. |
| December | 36.8 °F | 47.0 °F | 13.51 in. |
| Annual | 43.8 °F | 58.7 °F | 84.04 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |