Frederick, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.7 °C (low) to 18.4 °C (high). Annual precipitation averages 367.5 Millimeters. Frederick is located in USDA Plant Hardiness Zone 5b. 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 | -9.2 °C | 6.6 °C | 10.16 mm |
| February | -7.9 °C | 7.6 °C | 10.92 mm |
| March | -3.3 °C | 13.3 °C | 31.24 mm |
| April | 0.6 °C | 16.8 °C | 45.97 mm |
| May | 6 °C | 21.7 °C | 60.96 mm |
| June | 11.1 °C | 28.6 °C | 36.83 mm |
| July | 14.3 °C | 31.9 °C | 36.58 mm |
| August | 12.9 °C | 30.7 °C | 41.4 mm |
| September | 8.2 °C | 26.4 °C | 37.34 mm |
| October | 1.3 °C | 18.8 °C | 26.67 mm |
| November | -4.4 °C | 11.7 °C | 18.54 mm |
| December | -9.2 °C | 6.2 °C | 10.92 mm |
| Annual | 1.7 °C | 18.4 °C | 367.53 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |