Kellogg, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 1.8 °C (low) to 14.2 °C (high). Annual precipitation averages 795.8 Millimeters. Kellogg 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 | -4.8 °C | 1.7 °C | 104.9 mm |
| February | -4.5 °C | 4.1 °C | 76.96 mm |
| March | -2.3 °C | 8.6 °C | 83.31 mm |
| April | 0.6 °C | 13.6 °C | 64.52 mm |
| May | 4.3 °C | 19.3 °C | 66.55 mm |
| June | 7.7 °C | 22.7 °C | 69.09 mm |
| July | 10 °C | 28.4 °C | 19.56 mm |
| August | 9.5 °C | 28.5 °C | 20.32 mm |
| September | 5.7 °C | 22.7 °C | 34.8 mm |
| October | 1.4 °C | 13.8 °C | 64.77 mm |
| November | -1.8 °C | 5.6 °C | 99.06 mm |
| December | -4.8 °C | 1.2 °C | 91.95 mm |
| Annual | 1.8 °C | 14.2 °C | 795.79 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 | Severe Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |