Calpine, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 32 °F (low) to 63.1 °F (high). Annual precipitation averages 25.5 Inches. Calpine is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.0 °F | 44.3 °F | 4.42 in. |
| February | 22.4 °F | 47.2 °F | 4.35 in. |
| March | 26.5 °F | 52.6 °F | 3.6 in. |
| April | 30.0 °F | 57.7 °F | 1.7 in. |
| May | 36.0 °F | 66.3 °F | 1.27 in. |
| June | 41.6 °F | 76.2 °F | 0.48 in. |
| July | 47.0 °F | 85.1 °F | 0.28 in. |
| August | 44.5 °F | 84.7 °F | 0.26 in. |
| September | 39.3 °F | 79.0 °F | 0.51 in. |
| October | 31.5 °F | 67.3 °F | 1.55 in. |
| November | 24.7 °F | 53.2 °F | 2.41 in. |
| December | 20.4 °F | 43.4 °F | 4.69 in. |
| Annual | 32 °F | 63.1 °F | 25.52 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| 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 |