Wardner, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 35 °F (low) to 56.1 °F (high). Annual precipitation averages 38.2 Inches. Wardner is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.3 °F | 34.5 °F | 4.4 in. |
| February | 24.0 °F | 38.5 °F | 3.51 in. |
| March | 27.7 °F | 46.3 °F | 4.45 in. |
| April | 32.7 °F | 54.6 °F | 3.28 in. |
| May | 39.5 °F | 64.8 °F | 3.04 in. |
| June | 45.4 °F | 71.2 °F | 2.93 in. |
| July | 49.7 °F | 81.5 °F | 1.01 in. |
| August | 49.0 °F | 81.6 °F | 1.0 in. |
| September | 42.4 °F | 71.2 °F | 1.47 in. |
| October | 34.4 °F | 55.3 °F | 3.28 in. |
| November | 28.6 °F | 41.0 °F | 5.03 in. |
| December | 23.2 °F | 33.2 °F | 4.76 in. |
| Annual | 35 °F | 56.1 °F | 38.16 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |