Spray, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 3.5 °C (low) to 19.7 °C (high). Annual precipitation averages 357.4 Millimeters. Spray is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.8 °C | 7.2 °C | 35.05 mm |
| February | -2.1 °C | 10.2 °C | 31.24 mm |
| March | -0.3 °C | 14.2 °C | 38.86 mm |
| April | 2.1 °C | 18.4 °C | 40.64 mm |
| May | 5.8 °C | 23.4 °C | 35.81 mm |
| June | 8.9 °C | 27.8 °C | 33.02 mm |
| July | 12.3 °C | 34.1 °C | 8.89 mm |
| August | 11.6 °C | 33.9 °C | 8.38 mm |
| September | 7.6 °C | 28.7 °C | 9.91 mm |
| October | 2.7 °C | 20.4 °C | 29.97 mm |
| November | -0.5 °C | 11.8 °C | 39.37 mm |
| December | -3.3 °C | 6.7 °C | 46.23 mm |
| Annual | 3.5 °C | 19.7 °C | 357.37 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |