Preston, Nevada has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.7 °C (low) to 18.1 °C (high). Annual precipitation averages 250.2 Millimeters. 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 | -9.3 °C | 6.3 °C | 23.88 mm |
| February | -7.4 °C | 7.8 °C | 24.64 mm |
| March | -4.6 °C | 12.9 °C | 23.11 mm |
| April | -1.9 °C | 16 °C | 25.65 mm |
| May | 2.1 °C | 21.4 °C | 24.13 mm |
| June | 6.1 °C | 27.5 °C | 18.54 mm |
| July | 9.9 °C | 31.4 °C | 16.26 mm |
| August | 9 °C | 30.5 °C | 21.08 mm |
| September | 4.7 °C | 26 °C | 16 mm |
| October | -1 °C | 19.3 °C | 26.67 mm |
| November | -6.3 °C | 11.7 °C | 11.18 mm |
| December | -10.1 °C | 5.9 °C | 19.05 mm |
| Annual | -0.7 °C | 18.1 °C | 250.19 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |