Alamo, North Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -2.1 °C (low) to 10.5 °C (high). Annual precipitation averages 412.3 Millimeters. Alamo is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.1 °C | -7.5 °C | 12.7 mm |
| February | -15.8 °C | -4.9 °C | 10.16 mm |
| March | -9.3 °C | 1.8 °C | 14.99 mm |
| April | -2.2 °C | 11.3 °C | 24.13 mm |
| May | 4.3 °C | 18.3 °C | 55.88 mm |
| June | 10.2 °C | 22.9 °C | 87.88 mm |
| July | 12.7 °C | 26.6 °C | 70.36 mm |
| August | 11.5 °C | 26.9 °C | 41.91 mm |
| September | 5.9 °C | 21.1 °C | 36.07 mm |
| October | -1.1 °C | 11.9 °C | 28.45 mm |
| November | -8.4 °C | 2 °C | 15.24 mm |
| December | -15 °C | -4.9 °C | 14.48 mm |
| Annual | -2.1 °C | 10.5 °C | 412.25 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |