Neotsu, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7 °C (low) to 14.3 °C (high). Annual precipitation averages 1910.1 Millimeters. 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 | 4.1 °C | 10.1 °C | 284.73 mm |
| February | 3.9 °C | 11.1 °C | 209.8 mm |
| March | 4.3 °C | 12.1 °C | 214.88 mm |
| April | 5.4 °C | 13 °C | 161.04 mm |
| May | 7.6 °C | 15.1 °C | 98.81 mm |
| June | 9.6 °C | 16.7 °C | 70.1 mm |
| July | 11 °C | 18.1 °C | 19.3 mm |
| August | 11.1 °C | 18.7 °C | 28.7 mm |
| September | 9.9 °C | 18.7 °C | 61.98 mm |
| October | 7.8 °C | 16.1 °C | 162.56 mm |
| November | 5.7 °C | 12.3 °C | 284.23 mm |
| December | 3.8 °C | 9.7 °C | 313.94 mm |
| Annual | 7 °C | 14.3 °C | 1910.07 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |