Berthoud, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 64.4 °F (high). Annual precipitation averages 16.1 Inches. Berthoud 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 | 15.9 °F | 43.6 °F | 0.51 in. |
| February | 18.0 °F | 45.3 °F | 0.53 in. |
| March | 26.0 °F | 55.3 °F | 1.32 in. |
| April | 32.8 °F | 61.7 °F | 1.82 in. |
| May | 42.4 °F | 70.4 °F | 3.08 in. |
| June | 51.5 °F | 82.5 °F | 1.99 in. |
| July | 57.3 °F | 88.6 °F | 1.39 in. |
| August | 55.0 °F | 86.3 °F | 1.78 in. |
| September | 46.6 °F | 78.6 °F | 1.34 in. |
| October | 34.8 °F | 65.0 °F | 1.09 in. |
| November | 24.4 °F | 52.4 °F | 0.68 in. |
| December | 16.0 °F | 43.0 °F | 0.54 in. |
| Annual | 35.1 °F | 64.4 °F | 16.07 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |