Camp Nelson, California has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 44.5 °F (low) to 67.1 °F (high). Annual precipitation averages 35.1 Inches. Camp Nelson is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.7 °F | 52.1 °F | 6.64 in. |
| February | 33.9 °F | 53.0 °F | 6.94 in. |
| March | 36.2 °F | 56.6 °F | 5.62 in. |
| April | 39.0 °F | 60.5 °F | 2.88 in. |
| May | 45.5 °F | 69.1 °F | 1.69 in. |
| June | 53.0 °F | 79.0 °F | 0.34 in. |
| July | 60.0 °F | 86.7 °F | 0.41 in. |
| August | 59.7 °F | 86.3 °F | 0.4 in. |
| September | 54.8 °F | 81.0 °F | 0.33 in. |
| October | 46.4 °F | 70.0 °F | 1.28 in. |
| November | 38.9 °F | 59.5 °F | 3.03 in. |
| December | 33.4 °F | 51.1 °F | 5.55 in. |
| Annual | 44.5 °F | 67.1 °F | 35.11 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |