Anacortes, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.6 °F (low) to 58.8 °F (high). Annual precipitation averages 28.4 Inches. Anacortes is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.0 °F | 46.5 °F | 3.77 in. |
| February | 35.9 °F | 48.4 °F | 2.59 in. |
| March | 38.5 °F | 52.2 °F | 2.47 in. |
| April | 41.7 °F | 57.7 °F | 2.12 in. |
| May | 46.4 °F | 63.7 °F | 1.95 in. |
| June | 50.4 °F | 67.8 °F | 1.34 in. |
| July | 52.8 °F | 72.7 °F | 0.75 in. |
| August | 52.8 °F | 73.1 °F | 0.83 in. |
| September | 49.6 °F | 68.2 °F | 1.6 in. |
| October | 44.4 °F | 59.1 °F | 3.09 in. |
| November | 39.4 °F | 50.9 °F | 4.3 in. |
| December | 35.7 °F | 45.7 °F | 3.56 in. |
| Annual | 43.6 °F | 58.8 °F | 28.37 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |