Mount Hebron, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from -1.1 °C (low) to 16.3 °C (high). Annual precipitation averages 310.4 Millimeters. Mount Hebron is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.9 °C | 5.5 °C | 45.47 mm |
| February | -5.8 °C | 7.6 °C | 30.99 mm |
| March | -3.9 °C | 10.4 °C | 33.27 mm |
| April | -2.6 °C | 13.9 °C | 22.61 mm |
| May | 0.9 °C | 18.8 °C | 27.18 mm |
| June | 3.9 °C | 23.3 °C | 18.54 mm |
| July | 7.2 °C | 29 °C | 8.38 mm |
| August | 6.2 °C | 28.7 °C | 5.59 mm |
| September | 2.4 °C | 25.1 °C | 8.38 mm |
| October | -1.7 °C | 18.1 °C | 21.08 mm |
| November | -5 °C | 9.8 °C | 35.81 mm |
| December | -7.4 °C | 4.9 °C | 53.09 mm |
| Annual | -1.1 °C | 16.3 °C | 310.39 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 125-150 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 | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |