Fort Lupton, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.6 °F (low) to 64.8 °F (high). Annual precipitation averages 13 Inches. Fort Lupton 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 | 14.3 °F | 43.0 °F | 0.35 in. |
| February | 17.0 °F | 45.0 °F | 0.33 in. |
| March | 25.6 °F | 56.0 °F | 0.95 in. |
| April | 32.8 °F | 62.3 °F | 1.69 in. |
| May | 42.7 °F | 71.1 °F | 2.11 in. |
| June | 52.1 °F | 83.4 °F | 1.47 in. |
| July | 57.6 °F | 89.6 °F | 1.36 in. |
| August | 55.1 °F | 87.2 °F | 1.76 in. |
| September | 46.4 °F | 79.5 °F | 1.07 in. |
| October | 33.7 °F | 65.6 °F | 0.95 in. |
| November | 23.2 °F | 52.6 °F | 0.62 in. |
| December | 14.4 °F | 42.3 °F | 0.37 in. |
| Annual | 34.6 °F | 64.8 °F | 13.03 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 | BSk - Cold Semi-Arid Climate |