Klamath Falls, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Annual precipitation averages 357.9 Millimeters. Klamath Falls is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.9 °C | 4.9 °C | 51.31 mm |
| February | -4.7 °C | 7.3 °C | 38.61 mm |
| March | -2.9 °C | 10.3 °C | 37.08 mm |
| April | -1.4 °C | 13.7 °C | 26.42 mm |
| May | 2.2 °C | 18.9 °C | 27.94 mm |
| June | 5 °C | 23.6 °C | 16.76 mm |
| July | 8.3 °C | 29.4 °C | 8.64 mm |
| August | 7.3 °C | 28.8 °C | 9.91 mm |
| September | 3.6 °C | 25 °C | 10.41 mm |
| October | -0.9 °C | 17.7 °C | 24.13 mm |
| November | -3.8 °C | 9.2 °C | 39.12 mm |
| December | -6.3 °C | 4.2 °C | 67.56 mm |
| Annual | 0 °C | 16.1 °C | 357.89 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |