Deming, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 42.2 °F (low) to 59.1 °F (high). Annual precipitation averages 57.1 Inches. Deming is located in USDA Plant Hardiness Zone 8a. 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 | 32.8 °F | 43.8 °F | 7.34 in. |
| February | 33.8 °F | 47.2 °F | 4.5 in. |
| March | 36.4 °F | 52.0 °F | 6.03 in. |
| April | 40.2 °F | 58.0 °F | 4.37 in. |
| May | 45.5 °F | 64.9 °F | 3.66 in. |
| June | 50.3 °F | 69.2 °F | 2.79 in. |
| July | 53.2 °F | 75.2 °F | 1.67 in. |
| August | 53.0 °F | 76.2 °F | 1.46 in. |
| September | 48.6 °F | 70.3 °F | 3.27 in. |
| October | 42.8 °F | 59.5 °F | 6.18 in. |
| November | 37.2 °F | 49.3 °F | 8.62 in. |
| December | 32.9 °F | 43.3 °F | 7.19 in. |
| Annual | 42.2 °F | 59.1 °F | 57.08 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |