Fall City, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7 °C (low) to 16 °C (high). Annual precipitation averages 1229.9 Millimeters. Fall City is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.3 °C | 8.5 °C | 172.47 mm |
| February | 2.3 °C | 10 °C | 111.25 mm |
| March | 3.6 °C | 12.2 °C | 128.52 mm |
| April | 5.5 °C | 15 °C | 105.41 mm |
| May | 8.5 °C | 18.4 °C | 74.68 mm |
| June | 10.9 °C | 20.7 °C | 62.48 mm |
| July | 12.9 °C | 24.6 °C | 25.4 mm |
| August | 13 °C | 25.3 °C | 26.67 mm |
| September | 10.7 °C | 22.1 °C | 56.39 mm |
| October | 7.3 °C | 16.2 °C | 117.09 mm |
| November | 4.3 °C | 11.1 °C | 191.01 mm |
| December | 2.1 °C | 7.9 °C | 158.5 mm |
| Annual | 7 °C | 16 °C | 1229.87 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |