Methow, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 2.9 °C (low) to 16.2 °C (high). Annual precipitation averages 345.5 Millimeters. Methow is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.4 °C | 0.3 °C | 46.23 mm |
| February | -4.8 °C | 4.4 °C | 28.19 mm |
| March | -1.3 °C | 11.1 °C | 38.1 mm |
| April | 2.2 °C | 17.1 °C | 23.88 mm |
| May | 6.4 °C | 22.4 °C | 26.67 mm |
| June | 9.9 °C | 26.1 °C | 27.43 mm |
| July | 13.1 °C | 31.6 °C | 15.24 mm |
| August | 12.7 °C | 31.3 °C | 10.16 mm |
| September | 8.1 °C | 25.9 °C | 8.13 mm |
| October | 2.5 °C | 16.5 °C | 27.69 mm |
| November | -2.1 °C | 6.7 °C | 43.18 mm |
| December | -5.9 °C | 0.4 °C | 50.55 mm |
| Annual | 2.9 °C | 16.2 °C | 345.45 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |