East Port Orchard, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.3 °C (low) to 15.6 °C (high). Annual precipitation averages 1267.2 Millimeters. East Port Orchard is located in USDA Plant Hardiness Zone 8b. 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 | 1.8 °C | 8 °C | 199.64 mm |
| February | 1.7 °C | 9.4 °C | 115.82 mm |
| March | 3 °C | 11.8 °C | 140.46 mm |
| April | 4.7 °C | 14.7 °C | 89.66 mm |
| May | 7.7 °C | 18.4 °C | 52.32 mm |
| June | 10.2 °C | 20.9 °C | 40.13 mm |
| July | 12.1 °C | 24.3 °C | 21.08 mm |
| August | 12.2 °C | 24.7 °C | 26.92 mm |
| September | 10.2 °C | 21.7 °C | 46.74 mm |
| October | 6.8 °C | 15.5 °C | 120.4 mm |
| November | 3.6 °C | 10.4 °C | 201.42 mm |
| December | 1.7 °C | 7.5 °C | 212.6 mm |
| Annual | 6.3 °C | 15.6 °C | 1267.19 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |