Pe Ell, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.1 °F (low) to 61.3 °F (high). Annual precipitation averages 56.8 Inches. Pe Ell is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.9 °F | 46.0 °F | 8.51 in. |
| February | 33.5 °F | 50.5 °F | 5.92 in. |
| March | 35.7 °F | 55.3 °F | 6.43 in. |
| April | 38.4 °F | 59.3 °F | 4.7 in. |
| May | 43.8 °F | 66.3 °F | 2.59 in. |
| June | 47.8 °F | 70.8 °F | 1.91 in. |
| July | 51.1 °F | 77.8 °F | 0.55 in. |
| August | 50.7 °F | 79.1 °F | 0.92 in. |
| September | 46.5 °F | 73.5 °F | 2.02 in. |
| October | 41.1 °F | 61.4 °F | 5.14 in. |
| November | 36.5 °F | 51.2 °F | 8.99 in. |
| December | 33.6 °F | 44.9 °F | 9.14 in. |
| Annual | 41.1 °F | 61.3 °F | 56.82 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |