Calpine, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Annual precipitation averages 648.2 Millimeters. 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 | -6.7 °C | 6.8 °C | 112.27 mm |
| February | -5.3 °C | 8.4 °C | 110.49 mm |
| March | -3.1 °C | 11.4 °C | 91.44 mm |
| April | -1.1 °C | 14.3 °C | 43.18 mm |
| May | 2.2 °C | 19.1 °C | 32.26 mm |
| June | 5.3 °C | 24.6 °C | 12.19 mm |
| July | 8.3 °C | 29.5 °C | 7.11 mm |
| August | 6.9 °C | 29.3 °C | 6.6 mm |
| September | 4.1 °C | 26.1 °C | 12.95 mm |
| October | -0.3 °C | 19.6 °C | 39.37 mm |
| November | -4.1 °C | 11.8 °C | 61.21 mm |
| December | -6.4 °C | 6.3 °C | 119.13 mm |
| Annual | -0 °C | 17.3 °C | 648.2 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |