Rico, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -4 °C (low) to 12.8 °C (high). Annual precipitation averages 626.1 Millimeters. Rico is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Jun. 21 - Jun. 30 through the first frost around Aug. 11 - Aug. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.9 °C | 2.6 °C | 60.71 mm |
| February | -12.7 °C | 3.8 °C | 60.96 mm |
| March | -9.1 °C | 7.4 °C | 56.9 mm |
| April | -5 °C | 10.7 °C | 45.47 mm |
| May | -0.7 °C | 15.9 °C | 39.62 mm |
| June | 3.1 °C | 22.2 °C | 19.3 mm |
| July | 6.5 °C | 24.4 °C | 55.37 mm |
| August | 6.2 °C | 22.9 °C | 70.1 mm |
| September | 2.3 °C | 19.7 °C | 62.48 mm |
| October | -2.9 °C | 14 °C | 54.1 mm |
| November | -8.7 °C | 7.3 °C | 49.28 mm |
| December | -13.5 °C | 2.2 °C | 51.82 mm |
| Annual | -4 °C | 12.8 °C | 626.11 mm |
| Average First Frost Date | Aug. 11 - Aug. 20 |
| Average Last Frost Date | Jun. 21 - Jun. 30 |
| 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 |