Mount Hebron, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 30.1 °F (low) to 61.3 °F (high). Annual precipitation averages 12.2 Inches. 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 | 19.6 °F | 41.9 °F | 1.79 in. |
| February | 21.5 °F | 45.7 °F | 1.22 in. |
| March | 25.0 °F | 50.8 °F | 1.31 in. |
| April | 27.4 °F | 57.0 °F | 0.89 in. |
| May | 33.7 °F | 65.8 °F | 1.07 in. |
| June | 39.0 °F | 74.0 °F | 0.73 in. |
| July | 45.0 °F | 84.2 °F | 0.33 in. |
| August | 43.1 °F | 83.6 °F | 0.22 in. |
| September | 36.4 °F | 77.1 °F | 0.33 in. |
| October | 29.0 °F | 64.6 °F | 0.83 in. |
| November | 23.0 °F | 49.6 °F | 1.41 in. |
| December | 18.6 °F | 40.9 °F | 2.09 in. |
| Annual | 30.1 °F | 61.3 °F | 12.22 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |