Cave Junction, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 4.4 °C (low) to 20.5 °C (high). Annual precipitation averages 1291.1 Millimeters. Cave Junction is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.1 °C | 9.4 °C | 227.33 mm |
| February | 0.4 °C | 12.6 °C | 166.88 mm |
| March | 1.2 °C | 15.2 °C | 186.69 mm |
| April | 2.7 °C | 18.3 °C | 105.66 mm |
| May | 5.6 °C | 23.2 °C | 50.8 mm |
| June | 8.2 °C | 27.7 °C | 20.57 mm |
| July | 11 °C | 33.5 °C | 7.11 mm |
| August | 10 °C | 33.3 °C | 5.08 mm |
| September | 7.1 °C | 29.8 °C | 16.26 mm |
| October | 3.6 °C | 21.9 °C | 86.36 mm |
| November | 2.1 °C | 12.8 °C | 190.5 mm |
| December | 0.4 °C | 8.3 °C | 227.84 mm |
| Annual | 4.4 °C | 20.5 °C | 1291.08 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |