Ridgway, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.6 °C (low) to 16 °C (high). Annual precipitation averages 403.1 Millimeters. Ridgway is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.2 °C | 3.4 °C | 24.38 mm |
| February | -9.6 °C | 5.7 °C | 24.13 mm |
| March | -5.6 °C | 10.7 °C | 33.78 mm |
| April | -2 °C | 14.6 °C | 37.08 mm |
| May | 2 °C | 20.3 °C | 37.34 mm |
| June | 5.9 °C | 26.7 °C | 20.83 mm |
| July | 9.7 °C | 29.1 °C | 45.97 mm |
| August | 8.9 °C | 27.6 °C | 52.07 mm |
| September | 4.6 °C | 23.8 °C | 38.35 mm |
| October | -1.4 °C | 17.3 °C | 31.5 mm |
| November | -6.8 °C | 9.8 °C | 29.97 mm |
| December | -12.1 °C | 3.3 °C | 27.69 mm |
| Annual | -1.6 °C | 16 °C | 403.09 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |