Alamo, Nevada has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 5.8 °C (low) to 24.2 °C (high). Annual precipitation averages 179.1 Millimeters. Alamo is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 12.4 °C | 22.61 mm |
| February | -1.8 °C | 14.4 °C | 26.42 mm |
| March | 1.2 °C | 18.7 °C | 21.34 mm |
| April | 4.2 °C | 22.7 °C | 13.97 mm |
| May | 8.9 °C | 27.9 °C | 11.94 mm |
| June | 13.6 °C | 33.9 °C | 3.81 mm |
| July | 17.6 °C | 37.3 °C | 14.48 mm |
| August | 16.7 °C | 36.2 °C | 14.73 mm |
| September | 11.3 °C | 32.6 °C | 9.65 mm |
| October | 5.2 °C | 25.4 °C | 13.46 mm |
| November | -0.8 °C | 17.7 °C | 12.95 mm |
| December | -3.8 °C | 11.6 °C | 13.72 mm |
| Annual | 5.8 °C | 24.2 °C | 179.08 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |