Biggs Junction, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 43.3 °F (low) to 64.3 °F (high). Annual precipitation averages 10.8 Inches. Biggs Junction is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.2 °F | 42.1 °F | 1.91 in. |
| February | 32.1 °F | 47.8 °F | 1.23 in. |
| March | 35.8 °F | 55.9 °F | 0.97 in. |
| April | 40.9 °F | 62.7 °F | 0.64 in. |
| May | 47.6 °F | 71.6 °F | 0.65 in. |
| June | 53.2 °F | 78.0 °F | 0.38 in. |
| July | 59.2 °F | 87.8 °F | 0.16 in. |
| August | 59.0 °F | 88.2 °F | 0.17 in. |
| September | 51.6 °F | 79.9 °F | 0.29 in. |
| October | 42.6 °F | 65.4 °F | 0.77 in. |
| November | 35.4 °F | 50.7 °F | 1.5 in. |
| December | 31.2 °F | 41.7 °F | 2.11 in. |
| Annual | 43.3 °F | 64.3 °F | 10.78 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |