Longview Heights, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.5 °F (low) to 59.9 °F (high). Annual precipitation averages 58.7 Inches. 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 | 34.2 °F | 44.7 °F | 8.25 in. |
| February | 34.1 °F | 48.3 °F | 6.12 in. |
| March | 36.0 °F | 52.6 °F | 6.34 in. |
| April | 38.3 °F | 58.1 °F | 5.15 in. |
| May | 43.5 °F | 65.1 °F | 3.2 in. |
| June | 47.3 °F | 69.2 °F | 2.4 in. |
| July | 51.3 °F | 76.4 °F | 0.69 in. |
| August | 52.0 °F | 77.7 °F | 0.95 in. |
| September | 48.3 °F | 72.8 °F | 2.28 in. |
| October | 42.5 °F | 60.6 °F | 5.42 in. |
| November | 37.0 °F | 49.5 °F | 8.89 in. |
| December | 33.9 °F | 43.4 °F | 9.04 in. |
| Annual | 41.5 °F | 59.9 °F | 58.73 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |