Fall City, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 44.5 °F (low) to 60.8 °F (high). Annual precipitation averages 48.4 Inches. 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 | 36.1 °F | 47.3 °F | 6.79 in. |
| February | 36.1 °F | 50.0 °F | 4.38 in. |
| March | 38.5 °F | 54.0 °F | 5.06 in. |
| April | 41.9 °F | 59.0 °F | 4.15 in. |
| May | 47.3 °F | 65.2 °F | 2.94 in. |
| June | 51.7 °F | 69.3 °F | 2.46 in. |
| July | 55.3 °F | 76.2 °F | 1.0 in. |
| August | 55.4 °F | 77.5 °F | 1.05 in. |
| September | 51.3 °F | 71.8 °F | 2.22 in. |
| October | 45.1 °F | 61.1 °F | 4.61 in. |
| November | 39.7 °F | 51.9 °F | 7.52 in. |
| December | 35.8 °F | 46.3 °F | 6.24 in. |
| Annual | 44.5 °F | 60.8 °F | 48.42 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |