Manzanita, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 46.2 °F (low) to 57.3 °F (high). Annual precipitation averages 80.3 Inches. Manzanita is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.0 °F | 50.0 °F | 11.15 in. |
| February | 39.9 °F | 51.5 °F | 7.72 in. |
| March | 41.5 °F | 53.5 °F | 9.65 in. |
| April | 43.2 °F | 54.8 °F | 6.69 in. |
| May | 47.6 °F | 58.3 °F | 4.05 in. |
| June | 50.4 °F | 61.5 °F | 3.5 in. |
| July | 54.2 °F | 64.8 °F | 1.04 in. |
| August | 54.0 °F | 65.5 °F | 2.09 in. |
| September | 52.0 °F | 64.9 °F | 3.0 in. |
| October | 47.9 °F | 60.0 °F | 6.77 in. |
| November | 44.0 °F | 53.9 °F | 12.64 in. |
| December | 40.0 °F | 49.1 °F | 12.03 in. |
| Annual | 46.2 °F | 57.3 °F | 80.33 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |