Fowler, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.3 °C (low) to 20.6 °C (high). Annual precipitation averages 289 Millimeters. Fowler 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 | -9.8 °C | 8.4 °C | 5.33 mm |
| February | -7.9 °C | 10 °C | 5.33 mm |
| March | -3.4 °C | 15.8 °C | 16.51 mm |
| April | 1.3 °C | 19.6 °C | 32 mm |
| May | 7.3 °C | 24.8 °C | 38.86 mm |
| June | 12.9 °C | 30.9 °C | 36.32 mm |
| July | 15.8 °C | 33.6 °C | 45.72 mm |
| August | 14.7 °C | 32.2 °C | 52.07 mm |
| September | 9.6 °C | 28.3 °C | 17.27 mm |
| October | 1.8 °C | 21.2 °C | 21.84 mm |
| November | -4.8 °C | 14 °C | 9.91 mm |
| December | -9.5 °C | 8.3 °C | 7.87 mm |
| Annual | 2.3 °C | 20.6 °C | 289.03 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 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 |