Gilchrist, Oregon has a Continental Subarctic - Cold Dry Summer climate (Köppen classification: Dsc). Average annual temperatures range from -1 °C (low) to 13.8 °C (high). Annual precipitation averages 676.7 Millimeters. Gilchrist is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.4 °C | 4.4 °C | 107.44 mm |
| February | -5.8 °C | 5.4 °C | 73.41 mm |
| March | -4.3 °C | 8.3 °C | 70.1 mm |
| April | -2.6 °C | 10.9 °C | 48.01 mm |
| May | 0.8 °C | 16 °C | 41.4 mm |
| June | 3.2 °C | 20.2 °C | 23.88 mm |
| July | 6.3 °C | 26.3 °C | 12.95 mm |
| August | 5.6 °C | 26.4 °C | 13.21 mm |
| September | 2.3 °C | 22.3 °C | 18.03 mm |
| October | -1 °C | 14.7 °C | 48.01 mm |
| November | -4.1 °C | 7.3 °C | 92.2 mm |
| December | -6.5 °C | 3.1 °C | 128.02 mm |
| Annual | -1 °C | 13.8 °C | 676.66 mm |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsc - Continental Subarctic - Cold Dry Summer |