Lonerock, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 35.6 °F (low) to 61.1 °F (high). Annual precipitation averages 14.6 Inches. Lonerock is located in USDA Plant Hardiness Zone 7a. 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 | 25.2 °F | 42.0 °F | 1.43 in. |
| February | 26.2 °F | 45.4 °F | 1.15 in. |
| March | 29.6 °F | 51.9 °F | 1.44 in. |
| April | 33.1 °F | 57.7 °F | 1.6 in. |
| May | 38.9 °F | 66.3 °F | 1.72 in. |
| June | 44.2 °F | 73.7 °F | 1.48 in. |
| July | 49.6 °F | 84.7 °F | 0.42 in. |
| August | 48.4 °F | 84.3 °F | 0.43 in. |
| September | 42.5 °F | 75.5 °F | 0.57 in. |
| October | 35.2 °F | 62.3 °F | 1.34 in. |
| November | 29.3 °F | 48.9 °F | 1.53 in. |
| December | 24.5 °F | 40.7 °F | 1.44 in. |
| Annual | 35.6 °F | 61.1 °F | 14.55 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |