Longview Heights, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.3 °C (low) to 15.5 °C (high). Annual precipitation averages 1491.8 Millimeters. Longview Heights is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.2 °C | 7.1 °C | 209.55 mm |
| February | 1.2 °C | 9.1 °C | 155.45 mm |
| March | 2.2 °C | 11.4 °C | 161.04 mm |
| April | 3.5 °C | 14.5 °C | 130.81 mm |
| May | 6.4 °C | 18.4 °C | 81.28 mm |
| June | 8.5 °C | 20.7 °C | 60.96 mm |
| July | 10.7 °C | 24.7 °C | 17.53 mm |
| August | 11.1 °C | 25.4 °C | 24.13 mm |
| September | 9.1 °C | 22.7 °C | 57.91 mm |
| October | 5.8 °C | 15.9 °C | 137.67 mm |
| November | 2.8 °C | 9.7 °C | 225.81 mm |
| December | 1.1 °C | 6.3 °C | 229.62 mm |
| Annual | 5.3 °C | 15.5 °C | 1491.76 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |