Wendell, Idaho has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3 °C (low) to 17.7 °C (high). Annual precipitation averages 250 Millimeters. Wendell is located in USDA Plant Hardiness Zone 6b. 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 | -5.9 °C | 3.2 °C | 33.53 mm |
| February | -4.3 °C | 6.6 °C | 19.3 mm |
| March | -0.9 °C | 12.4 °C | 25.15 mm |
| April | 1.8 °C | 16.6 °C | 23.37 mm |
| May | 6.2 °C | 21.9 °C | 27.43 mm |
| June | 10.2 °C | 27.2 °C | 16.51 mm |
| July | 14 °C | 33.3 °C | 3.81 mm |
| August | 12.8 °C | 32.4 °C | 6.35 mm |
| September | 8 °C | 26.7 °C | 9.91 mm |
| October | 2.5 °C | 18.7 °C | 20.07 mm |
| November | -2.5 °C | 9.7 °C | 24.64 mm |
| December | -5.8 °C | 3.2 °C | 39.88 mm |
| Annual | 3 °C | 17.7 °C | 249.95 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |