Granite, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 29.1 °F (low) to 55.5 °F (high). Annual precipitation averages 24.2 Inches. Granite is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.0 °F | 34.6 °F | 3.15 in. |
| February | 17.8 °F | 39.3 °F | 2.36 in. |
| March | 22.3 °F | 45.6 °F | 2.57 in. |
| April | 27.2 °F | 51.3 °F | 2.16 in. |
| May | 33.6 °F | 60.6 °F | 2.39 in. |
| June | 38.3 °F | 68.7 °F | 1.6 in. |
| July | 44.2 °F | 80.8 °F | 0.61 in. |
| August | 43.5 °F | 81.2 °F | 0.57 in. |
| September | 37.3 °F | 71.9 °F | 0.74 in. |
| October | 29.7 °F | 57.2 °F | 1.72 in. |
| November | 23.2 °F | 41.6 °F | 2.67 in. |
| December | 16.1 °F | 33.2 °F | 3.62 in. |
| Annual | 29.1 °F | 55.5 °F | 24.16 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Dsb - Humid Continental Climate - Dry Cool Summer |