Oceanside, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 45.4 °F (low) to 58.1 °F (high). Annual precipitation averages 93.6 Inches. Oceanside is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.6 °F | 50.1 °F | 13.62 in. |
| February | 39.7 °F | 51.8 °F | 10.11 in. |
| March | 40.6 °F | 53.7 °F | 10.42 in. |
| April | 42.4 °F | 56.4 °F | 7.82 in. |
| May | 46.7 °F | 59.5 °F | 4.73 in. |
| June | 49.9 °F | 62.6 °F | 3.39 in. |
| July | 52.8 °F | 65.9 °F | 0.97 in. |
| August | 52.7 °F | 66.7 °F | 1.34 in. |
| September | 50.7 °F | 65.8 °F | 3.32 in. |
| October | 47.1 °F | 61.1 °F | 8.4 in. |
| November | 43.3 °F | 53.8 °F | 14.03 in. |
| December | 39.7 °F | 49.2 °F | 15.4 in. |
| Annual | 45.4 °F | 58.1 °F | 93.55 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |