Klickitat, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 5.4 °C (low) to 17.6 °C (high). Annual precipitation averages 360.4 Millimeters. Klickitat is located in USDA Plant Hardiness Zone 7b. 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 | -0.9 °C | 5.6 °C | 51.31 mm |
| February | -0.4 °C | 8.8 °C | 40.64 mm |
| March | 1.7 °C | 12.8 °C | 34.54 mm |
| April | 4.2 °C | 16.7 °C | 18.8 mm |
| May | 7.7 °C | 21.7 °C | 22.35 mm |
| June | 10.6 °C | 25 °C | 12.7 mm |
| July | 13.7 °C | 30.1 °C | 3.56 mm |
| August | 13.5 °C | 30.3 °C | 8.13 mm |
| September | 9.6 °C | 26.2 °C | 9.14 mm |
| October | 5 °C | 18.3 °C | 28.45 mm |
| November | 1.5 °C | 10.3 °C | 52.58 mm |
| December | -0.9 °C | 5.3 °C | 78.23 mm |
| Annual | 5.4 °C | 17.6 °C | 360.43 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |