Tyhee, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.9 °C (low) to 15.5 °C (high). Annual precipitation averages 292.1 Millimeters. Tyhee is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.5 °C | 0.7 °C | 24.13 mm |
| February | -6.9 °C | 3.5 °C | 21.84 mm |
| March | -2.7 °C | 9.8 °C | 29.97 mm |
| April | 0.1 °C | 14.7 °C | 31.24 mm |
| May | 4.3 °C | 20 °C | 34.54 mm |
| June | 7.9 °C | 25.3 °C | 24.38 mm |
| July | 11.3 °C | 31.2 °C | 14.22 mm |
| August | 10.6 °C | 30.7 °C | 18.29 mm |
| September | 6.1 °C | 25 °C | 23.62 mm |
| October | 0.7 °C | 16.7 °C | 23.37 mm |
| November | -4.3 °C | 7.8 °C | 21.84 mm |
| December | -8.3 °C | 1.1 °C | 24.64 mm |
| Annual | 0.9 °C | 15.5 °C | 292.08 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| 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 | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |