Pine Grove, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 36.1 °F (low) to 60.8 °F (high). Annual precipitation averages 17.8 Inches. 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 | 25.4 °F | 40.8 °F | 2.91 in. |
| February | 26.6 °F | 45.0 °F | 2.23 in. |
| March | 29.4 °F | 51.6 °F | 1.5 in. |
| April | 33.3 °F | 58.3 °F | 1.16 in. |
| May | 39.4 °F | 67.2 °F | 1.17 in. |
| June | 45.1 °F | 73.9 °F | 0.78 in. |
| July | 50.5 °F | 84.1 °F | 0.24 in. |
| August | 49.6 °F | 84.3 °F | 0.25 in. |
| September | 44.2 °F | 76.1 °F | 0.43 in. |
| October | 36.3 °F | 61.4 °F | 1.37 in. |
| November | 29.2 °F | 47.4 °F | 2.43 in. |
| December | 24.6 °F | 39.4 °F | 3.3 in. |
| Annual | 36.1 °F | 60.8 °F | 17.77 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |