Otis, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.2 °C (low) to 17.5 °C (high). Annual precipitation averages 425.7 Millimeters. Otis is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | 5.2 °C | 8.38 mm |
| February | -8 °C | 6.3 °C | 10.67 mm |
| March | -3.7 °C | 12 °C | 20.07 mm |
| April | 0.4 °C | 16.1 °C | 40.39 mm |
| May | 6.2 °C | 21.2 °C | 70.36 mm |
| June | 11.9 °C | 27.8 °C | 61.98 mm |
| July | 15.5 °C | 31.4 °C | 70.1 mm |
| August | 14.2 °C | 30.2 °C | 60.96 mm |
| September | 9.3 °C | 26 °C | 30.99 mm |
| October | 1.8 °C | 18.2 °C | 28.45 mm |
| November | -4.1 °C | 10.9 °C | 13.21 mm |
| December | -8.8 °C | 5.2 °C | 10.16 mm |
| Annual | 2.2 °C | 17.5 °C | 425.72 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |