Brandon, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.5 °C (low) to 19.8 °C (high). Annual precipitation averages 372.6 Millimeters. Brandon 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.8 °C | 7.1 °C | 4.83 mm |
| February | -8.1 °C | 8.7 °C | 7.37 mm |
| March | -3.8 °C | 14.6 °C | 13.97 mm |
| April | 1.2 °C | 18.7 °C | 33.78 mm |
| May | 7.4 °C | 24.2 °C | 54.36 mm |
| June | 13.4 °C | 30.6 °C | 58.17 mm |
| July | 16.4 °C | 33.4 °C | 72.9 mm |
| August | 15.2 °C | 31.7 °C | 60.71 mm |
| September | 10.3 °C | 27.8 °C | 19.56 mm |
| October | 2.2 °C | 20.5 °C | 30.48 mm |
| November | -4.6 °C | 12.9 °C | 9.14 mm |
| December | -9.4 °C | 7.3 °C | 7.37 mm |
| Annual | 2.5 °C | 19.8 °C | 372.64 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |