McCleary, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.5 °F (low) to 60.7 °F (high). Annual precipitation averages 84 Inches. McCleary 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 | 34.7 °F | 46.4 °F | 13.03 in. |
| February | 33.8 °F | 49.4 °F | 8.13 in. |
| March | 35.7 °F | 53.6 °F | 9.21 in. |
| April | 38.1 °F | 58.9 °F | 6.23 in. |
| May | 43.9 °F | 65.8 °F | 3.67 in. |
| June | 48.3 °F | 70.4 °F | 2.5 in. |
| July | 51.8 °F | 76.8 °F | 0.9 in. |
| August | 51.6 °F | 77.5 °F | 1.59 in. |
| September | 47.4 °F | 72.2 °F | 3.12 in. |
| October | 41.7 °F | 60.9 °F | 8.24 in. |
| November | 36.9 °F | 51.2 °F | 13.94 in. |
| December | 33.9 °F | 45.3 °F | 13.42 in. |
| Annual | 41.5 °F | 60.7 °F | 83.98 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 |