Weston, Idaho has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.1 °F (low) to 59.6 °F (high). Annual precipitation averages 16.2 Inches. Weston is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.3 °F | 32.3 °F | 1.81 in. |
| February | 18.0 °F | 37.3 °F | 1.25 in. |
| March | 26.8 °F | 49.0 °F | 1.52 in. |
| April | 32.4 °F | 57.6 °F | 1.85 in. |
| May | 39.2 °F | 67.0 °F | 2.23 in. |
| June | 45.4 °F | 77.7 °F | 1.18 in. |
| July | 53.0 °F | 88.2 °F | 0.53 in. |
| August | 51.5 °F | 87.1 °F | 0.69 in. |
| September | 43.3 °F | 76.7 °F | 1.45 in. |
| October | 33.2 °F | 61.9 °F | 1.61 in. |
| November | 23.8 °F | 46.2 °F | 1.1 in. |
| December | 16.0 °F | 34.0 °F | 0.94 in. |
| Annual | 33.1 °F | 59.6 °F | 16.16 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |