Altamont, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.5 °C (low) to 14 °C (high). Annual precipitation averages 246.6 Millimeters. Altamont is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.5 °C | -0.8 °C | 18.03 mm |
| February | -9.9 °C | 2.3 °C | 14.22 mm |
| March | -4.8 °C | 8.9 °C | 13.97 mm |
| April | -1.5 °C | 13.5 °C | 21.84 mm |
| May | 3.5 °C | 18.7 °C | 28.19 mm |
| June | 7.9 °C | 24.8 °C | 20.07 mm |
| July | 11.9 °C | 28.8 °C | 17.53 mm |
| August | 11 °C | 27.6 °C | 24.89 mm |
| September | 6.3 °C | 22.6 °C | 31.5 mm |
| October | 0.1 °C | 14.8 °C | 26.16 mm |
| November | -5.9 °C | 6.7 °C | 13.72 mm |
| December | -11.7 °C | -0.2 °C | 16.51 mm |
| Annual | -0.5 °C | 14 °C | 246.63 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |