Falls City, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 42 °F (low) to 62.9 °F (high). Annual precipitation averages 65.9 Inches. Falls City is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.4 °F | 46.6 °F | 10.72 in. |
| February | 34.6 °F | 50.5 °F | 8.36 in. |
| March | 36.7 °F | 55.2 °F | 7.58 in. |
| April | 39.3 °F | 60.1 °F | 5.23 in. |
| May | 44.2 °F | 67.1 °F | 2.43 in. |
| June | 48.5 °F | 72.6 °F | 1.32 in. |
| July | 51.7 °F | 81.6 °F | 0.27 in. |
| August | 51.7 °F | 82.5 °F | 0.46 in. |
| September | 48.7 °F | 76.7 °F | 1.6 in. |
| October | 42.9 °F | 64.2 °F | 4.9 in. |
| November | 37.8 °F | 52.3 °F | 10.12 in. |
| December | 34.0 °F | 45.7 °F | 12.92 in. |
| Annual | 42 °F | 62.9 °F | 65.91 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 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 | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |