Manzanita, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.9 °C (low) to 14.1 °C (high). Annual precipitation averages 2040.4 Millimeters. 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 | 4.4 °C | 10 °C | 283.21 mm |
| February | 4.4 °C | 10.8 °C | 196.09 mm |
| March | 5.3 °C | 11.9 °C | 245.11 mm |
| April | 6.2 °C | 12.7 °C | 169.93 mm |
| May | 8.7 °C | 14.6 °C | 102.87 mm |
| June | 10.2 °C | 16.4 °C | 88.9 mm |
| July | 12.3 °C | 18.2 °C | 26.42 mm |
| August | 12.2 °C | 18.6 °C | 53.09 mm |
| September | 11.1 °C | 18.3 °C | 76.2 mm |
| October | 8.8 °C | 15.6 °C | 171.96 mm |
| November | 6.7 °C | 12.2 °C | 321.06 mm |
| December | 4.4 °C | 9.5 °C | 305.56 mm |
| Annual | 7.9 °C | 14.1 °C | 2040.4 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |