Lonerock, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 2 °C (low) to 16.2 °C (high). Annual precipitation averages 369.6 Millimeters. 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 | -3.8 °C | 5.6 °C | 36.32 mm |
| February | -3.2 °C | 7.4 °C | 29.21 mm |
| March | -1.3 °C | 11.1 °C | 36.58 mm |
| April | 0.6 °C | 14.3 °C | 40.64 mm |
| May | 3.8 °C | 19.1 °C | 43.69 mm |
| June | 6.8 °C | 23.2 °C | 37.59 mm |
| July | 9.8 °C | 29.3 °C | 10.67 mm |
| August | 9.1 °C | 29.1 °C | 10.92 mm |
| September | 5.8 °C | 24.2 °C | 14.48 mm |
| October | 1.8 °C | 16.8 °C | 34.04 mm |
| November | -1.5 °C | 9.4 °C | 38.86 mm |
| December | -4.2 °C | 4.8 °C | 36.58 mm |
| Annual | 2 °C | 16.2 °C | 369.58 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |