Sunriver, Oregon has a Continental Subarctic - Cold Dry Summer climate (Köppen classification: Dsc). Average annual temperatures range from -0.5 °C (low) to 15.1 °C (high). Annual precipitation averages 458.7 Millimeters. Sunriver is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.8 °C | 4.7 °C | 67.82 mm |
| February | -5.4 °C | 6.3 °C | 46.74 mm |
| March | -3.8 °C | 9.3 °C | 35.81 mm |
| April | -2.1 °C | 12.9 °C | 32.77 mm |
| May | 1.3 °C | 17.8 °C | 36.07 mm |
| June | 3.8 °C | 22.2 °C | 23.11 mm |
| July | 6.9 °C | 28.3 °C | 13.21 mm |
| August | 6.4 °C | 28.1 °C | 13.72 mm |
| September | 2.9 °C | 23.9 °C | 14.48 mm |
| October | -0.8 °C | 16.2 °C | 36.83 mm |
| November | -3.5 °C | 7.9 °C | 58.17 mm |
| December | -6.2 °C | 3.6 °C | 80.01 mm |
| Annual | -0.5 °C | 15.1 °C | 458.74 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dsc - Continental Subarctic - Cold Dry Summer |