Timnath, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.4 °C (low) to 17.3 °C (high). Annual precipitation averages 364 Millimeters. Timnath 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 | -9.6 °C | 5.4 °C | 9.65 mm |
| February | -8.3 °C | 6.6 °C | 9.4 mm |
| March | -3.7 °C | 12.4 °C | 25.65 mm |
| April | 0.3 °C | 16.1 °C | 46.74 mm |
| May | 5.9 °C | 20.8 °C | 69.6 mm |
| June | 11.1 °C | 27.4 °C | 42.42 mm |
| July | 14.1 °C | 30.9 °C | 40.39 mm |
| August | 12.7 °C | 29.6 °C | 34.29 mm |
| September | 7.8 °C | 25.3 °C | 32.51 mm |
| October | 1.2 °C | 17.8 °C | 28.19 mm |
| November | -4.8 °C | 10.6 °C | 15.24 mm |
| December | -9.6 °C | 5.1 °C | 9.91 mm |
| Annual | 1.4 °C | 17.3 °C | 363.99 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 | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |