Pine Grove, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 2.3 °C (low) to 16 °C (high). Annual precipitation averages 451.4 Millimeters. Pine Grove is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.7 °C | 4.9 °C | 73.91 mm |
| February | -3 °C | 7.2 °C | 56.64 mm |
| March | -1.4 °C | 10.9 °C | 38.1 mm |
| April | 0.7 °C | 14.6 °C | 29.46 mm |
| May | 4.1 °C | 19.6 °C | 29.72 mm |
| June | 7.3 °C | 23.3 °C | 19.81 mm |
| July | 10.3 °C | 28.9 °C | 6.1 mm |
| August | 9.8 °C | 29.1 °C | 6.35 mm |
| September | 6.8 °C | 24.5 °C | 10.92 mm |
| October | 2.4 °C | 16.3 °C | 34.8 mm |
| November | -1.6 °C | 8.6 °C | 61.72 mm |
| December | -4.1 °C | 4.1 °C | 83.82 mm |
| Annual | 2.3 °C | 16 °C | 451.35 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |