Tall Timber, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.3 °C (low) to 16.4 °C (high). Annual precipitation averages 550.7 Millimeters. Tall Timber is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6 °C | 6.7 °C | 19.56 mm |
| February | -6.4 °C | 6.9 °C | 27.18 mm |
| March | -3 °C | 10.9 °C | 47.5 mm |
| April | -0.2 °C | 13.9 °C | 77.98 mm |
| May | 4.8 °C | 18.6 °C | 80.52 mm |
| June | 10 °C | 25.3 °C | 53.59 mm |
| July | 13.6 °C | 28.8 °C | 50.55 mm |
| August | 12.6 °C | 27.7 °C | 51.82 mm |
| September | 8.3 °C | 23.6 °C | 54.36 mm |
| October | 2.3 °C | 16.6 °C | 38.86 mm |
| November | -2.7 °C | 10.8 °C | 27.43 mm |
| December | -6.3 °C | 6.4 °C | 21.34 mm |
| Annual | 2.3 °C | 16.4 °C | 550.69 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 | Dfb - Humid Continental Mild Summer, Wet All Year |