Camp Nelson, California has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 7 °C (low) to 19.5 °C (high). Annual precipitation averages 891.8 Millimeters. 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 | 0.9 °C | 11.2 °C | 168.66 mm |
| February | 1.1 °C | 11.7 °C | 176.28 mm |
| March | 2.3 °C | 13.7 °C | 142.75 mm |
| April | 3.9 °C | 15.8 °C | 73.15 mm |
| May | 7.5 °C | 20.6 °C | 42.93 mm |
| June | 11.7 °C | 26.1 °C | 8.64 mm |
| July | 15.6 °C | 30.4 °C | 10.41 mm |
| August | 15.4 °C | 30.2 °C | 10.16 mm |
| September | 12.7 °C | 27.2 °C | 8.38 mm |
| October | 8 °C | 21.1 °C | 32.51 mm |
| November | 3.8 °C | 15.3 °C | 76.96 mm |
| December | 0.8 °C | 10.6 °C | 140.97 mm |
| Annual | 7 °C | 19.5 °C | 891.8 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |