Dover, Idaho has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 35.4 °F (low) to 56.7 °F (high). Annual precipitation averages 32 Inches. Dover is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.6 °F | 34.3 °F | 4.37 in. |
| February | 23.8 °F | 38.6 °F | 2.25 in. |
| March | 28.3 °F | 46.7 °F | 3.47 in. |
| April | 33.5 °F | 55.7 °F | 2.76 in. |
| May | 40.7 °F | 66.0 °F | 2.41 in. |
| June | 46.3 °F | 71.8 °F | 2.51 in. |
| July | 50.4 °F | 81.9 °F | 1.14 in. |
| August | 49.3 °F | 82.1 °F | 0.87 in. |
| September | 42.1 °F | 71.5 °F | 1.18 in. |
| October | 34.5 °F | 56.1 °F | 2.7 in. |
| November | 28.9 °F | 42.2 °F | 3.87 in. |
| December | 23.3 °F | 33.9 °F | 4.43 in. |
| Annual | 35.4 °F | 56.7 °F | 31.96 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 150-180 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 | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |