Neotsu, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 44.6 °F (low) to 57.7 °F (high). Annual precipitation averages 75.2 Inches. Neotsu 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 | 39.3 °F | 50.2 °F | 11.21 in. |
| February | 39.0 °F | 52.0 °F | 8.26 in. |
| March | 39.8 °F | 53.7 °F | 8.46 in. |
| April | 41.7 °F | 55.4 °F | 6.34 in. |
| May | 45.7 °F | 59.2 °F | 3.89 in. |
| June | 49.3 °F | 62.1 °F | 2.76 in. |
| July | 51.8 °F | 64.6 °F | 0.76 in. |
| August | 51.9 °F | 65.7 °F | 1.13 in. |
| September | 49.8 °F | 65.6 °F | 2.44 in. |
| October | 46.1 °F | 60.9 °F | 6.4 in. |
| November | 42.2 °F | 54.1 °F | 11.19 in. |
| December | 38.9 °F | 49.4 °F | 12.36 in. |
| Annual | 44.6 °F | 57.7 °F | 75.2 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 30-40 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 |