Happy Camp, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 5 °C (low) to 21.6 °C (high). Annual precipitation averages 1311.4 Millimeters. Happy Camp is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.4 °C | 9.6 °C | 248.16 mm |
| February | 0.9 °C | 12.9 °C | 188.98 mm |
| March | 1.8 °C | 16.2 °C | 167.13 mm |
| April | 3.6 °C | 19.7 °C | 92.2 mm |
| May | 6.5 °C | 25 °C | 44.96 mm |
| June | 8.8 °C | 29.5 °C | 19.81 mm |
| July | 11.7 °C | 35.2 °C | 6.6 mm |
| August | 10.9 °C | 34.9 °C | 7.11 mm |
| September | 8.1 °C | 31.2 °C | 15.75 mm |
| October | 4.4 °C | 22.8 °C | 69.85 mm |
| November | 2.6 °C | 13.4 °C | 171.45 mm |
| December | 0.6 °C | 8.8 °C | 279.4 mm |
| Annual | 5 °C | 21.6 °C | 1311.4 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 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 | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |