Clifton, Idaho has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.9 °F (low) to 59.3 °F (high). Annual precipitation averages 17.1 Inches. Clifton is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.3 °F | 32.3 °F | 1.86 in. |
| February | 17.6 °F | 37.0 °F | 1.44 in. |
| March | 26.3 °F | 48.1 °F | 1.61 in. |
| April | 32.0 °F | 57.3 °F | 1.79 in. |
| May | 39.3 °F | 66.7 °F | 2.2 in. |
| June | 45.4 °F | 77.5 °F | 1.2 in. |
| July | 52.8 °F | 88.1 °F | 0.68 in. |
| August | 51.2 °F | 86.8 °F | 0.93 in. |
| September | 43.0 °F | 76.5 °F | 1.34 in. |
| October | 33.0 °F | 61.5 °F | 1.6 in. |
| November | 23.8 °F | 45.7 °F | 1.15 in. |
| December | 16.0 °F | 33.6 °F | 1.34 in. |
| Annual | 32.9 °F | 59.3 °F | 17.14 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |