Adams, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 4 °C (low) to 17.5 °C (high). Annual precipitation averages 474 Millimeters. Adams is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.5 °C | 5.4 °C | 55.12 mm |
| February | -1.7 °C | 8.1 °C | 42.93 mm |
| March | 0.6 °C | 12.5 °C | 53.34 mm |
| April | 2.8 °C | 16.3 °C | 48.51 mm |
| May | 6.4 °C | 21.2 °C | 51.05 mm |
| June | 9.5 °C | 25.3 °C | 34.29 mm |
| July | 12.4 °C | 31.4 °C | 7.62 mm |
| August | 11.9 °C | 31 °C | 10.41 mm |
| September | 7.9 °C | 25.7 °C | 14.48 mm |
| October | 3.2 °C | 17.9 °C | 34.8 mm |
| November | -0.2 °C | 9.8 °C | 59.94 mm |
| December | -2.6 °C | 5.1 °C | 61.47 mm |
| Annual | 4 °C | 17.5 °C | 473.96 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |