Superior, Colorado has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 3.2 °C (low) to 18.2 °C (high). Annual precipitation averages 449.3 Millimeters. Superior is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 7.8 °C | 13.46 mm |
| February | -5.8 °C | 8.2 °C | 17.27 mm |
| March | -1.9 °C | 12.9 °C | 40.39 mm |
| April | 1.4 °C | 16.1 °C | 70.61 mm |
| May | 6.4 °C | 20.9 °C | 70.36 mm |
| June | 11.6 °C | 27.7 °C | 41.91 mm |
| July | 15 °C | 31.2 °C | 43.69 mm |
| August | 13.9 °C | 29.9 °C | 33.78 mm |
| September | 9.4 °C | 25.6 °C | 44.96 mm |
| October | 2.9 °C | 18.4 °C | 32.51 mm |
| November | -2.3 °C | 12 °C | 21.84 mm |
| December | -6.4 °C | 7.4 °C | 18.54 mm |
| Annual | 3.2 °C | 18.2 °C | 449.32 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Cfa - Humid Subtropical Climate |