North Bonneville, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.3 °C (low) to 16.7 °C (high). Annual precipitation averages 1864.9 Millimeters. North Bonneville is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.9 °C | 6.7 °C | 281.69 mm |
| February | 2.3 °C | 9.2 °C | 198.37 mm |
| March | 3.7 °C | 12.6 °C | 211.07 mm |
| April | 5.8 °C | 15.7 °C | 143.51 mm |
| May | 8.8 °C | 19.8 °C | 90.17 mm |
| June | 11.4 °C | 22.6 °C | 68.07 mm |
| July | 13.9 °C | 26.9 °C | 12.45 mm |
| August | 14 °C | 27.6 °C | 18.8 mm |
| September | 11.4 °C | 24.4 °C | 54.1 mm |
| October | 8.1 °C | 17.8 °C | 170.18 mm |
| November | 4.7 °C | 10.8 °C | 288.8 mm |
| December | 2 °C | 6.7 °C | 327.66 mm |
| Annual | 7.3 °C | 16.7 °C | 1864.87 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |