Westfir, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.5 °C (low) to 16.9 °C (high). Annual precipitation averages 1316.5 Millimeters. Westfir is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.6 °C | 7.3 °C | 184.66 mm |
| February | 1.2 °C | 10.3 °C | 144.53 mm |
| March | 2.2 °C | 12.8 °C | 134.87 mm |
| April | 3.9 °C | 15.6 °C | 131.32 mm |
| May | 6.8 °C | 19.5 °C | 88.14 mm |
| June | 9.2 °C | 22.2 °C | 54.86 mm |
| July | 11.7 °C | 27.2 °C | 11.43 mm |
| August | 11.3 °C | 27.7 °C | 12.95 mm |
| September | 9.1 °C | 24.5 °C | 40.89 mm |
| October | 5.9 °C | 17.9 °C | 107.95 mm |
| November | 3.1 °C | 10.8 °C | 183.39 mm |
| December | 0.9 °C | 6.9 °C | 221.49 mm |
| Annual | 5.5 °C | 16.9 °C | 1316.48 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Extreme Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |