Rollinsville, Colorado has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from -2.4 °C (low) to 11.9 °C (high). Annual precipitation averages 582.2 Millimeters. Rollinsville is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10 °C | 1.4 °C | 24.64 mm |
| February | -9.5 °C | 2.3 °C | 30.73 mm |
| March | -7.2 °C | 6.2 °C | 53.85 mm |
| April | -4.7 °C | 9.6 °C | 73.66 mm |
| May | 0 °C | 14.4 °C | 73.15 mm |
| June | 4.1 °C | 21 °C | 49.78 mm |
| July | 7.6 °C | 24.4 °C | 84.84 mm |
| August | 6.6 °C | 23.1 °C | 58.17 mm |
| September | 2.9 °C | 19.5 °C | 44.45 mm |
| October | -2 °C | 12.6 °C | 33.78 mm |
| November | -6.8 °C | 6.2 °C | 28.7 mm |
| December | -9.9 °C | 1.6 °C | 26.42 mm |
| Annual | -2.4 °C | 11.9 °C | 582.17 mm |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |