Loyalton, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 33.1 °F (low) to 64 °F (high). Annual precipitation averages 19.3 Inches. Loyalton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.0 °F | 44.3 °F | 3.45 in. |
| February | 23.4 °F | 47.9 °F | 3.07 in. |
| March | 27.6 °F | 53.5 °F | 2.64 in. |
| April | 31.1 °F | 59.3 °F | 1.29 in. |
| May | 36.9 °F | 67.9 °F | 1.56 in. |
| June | 42.9 °F | 78.0 °F | 0.42 in. |
| July | 48.6 °F | 87.0 °F | 0.24 in. |
| August | 46.4 °F | 86.3 °F | 0.25 in. |
| September | 40.6 °F | 79.8 °F | 0.35 in. |
| October | 32.8 °F | 67.6 °F | 0.91 in. |
| November | 25.3 °F | 53.4 °F | 1.66 in. |
| December | 20.9 °F | 43.5 °F | 3.45 in. |
| Annual | 33.1 °F | 64 °F | 19.29 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 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 |