Palmer Lake, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Annual precipitation averages 557.3 Millimeters. Palmer Lake is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | 5.3 °C | 25.91 mm |
| February | -8.4 °C | 5.5 °C | 27.43 mm |
| March | -5.4 °C | 9.7 °C | 57.15 mm |
| April | -2.2 °C | 12.6 °C | 70.87 mm |
| May | 2.9 °C | 17.6 °C | 63.25 mm |
| June | 7.9 °C | 24.2 °C | 47.24 mm |
| July | 11.3 °C | 27.2 °C | 62.23 mm |
| August | 10.5 °C | 25.9 °C | 76.71 mm |
| September | 6.1 °C | 22.4 °C | 40.39 mm |
| October | 0.1 °C | 15.6 °C | 33.78 mm |
| November | -5.3 °C | 9.6 °C | 31.24 mm |
| December | -9.2 °C | 5.3 °C | 21.08 mm |
| Annual | -0 °C | 15.1 °C | 557.28 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |