Preston, Nevada has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.7 °F (low) to 64.5 °F (high). Annual precipitation averages 9.9 Inches. Preston is located in USDA Plant Hardiness Zone 6a. 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 | 15.3 °F | 43.4 °F | 0.94 in. |
| February | 18.6 °F | 46.1 °F | 0.97 in. |
| March | 23.8 °F | 55.3 °F | 0.91 in. |
| April | 28.5 °F | 60.8 °F | 1.01 in. |
| May | 35.8 °F | 70.5 °F | 0.95 in. |
| June | 43.0 °F | 81.5 °F | 0.73 in. |
| July | 49.8 °F | 88.5 °F | 0.64 in. |
| August | 48.2 °F | 86.9 °F | 0.83 in. |
| September | 40.5 °F | 78.8 °F | 0.63 in. |
| October | 30.2 °F | 66.7 °F | 1.05 in. |
| November | 20.6 °F | 53.0 °F | 0.44 in. |
| December | 13.9 °F | 42.7 °F | 0.75 in. |
| Annual | 30.7 °F | 64.5 °F | 9.85 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |