Richfield, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.4 °F (low) to 64.8 °F (high). Annual precipitation averages 8.5 Inches. Richfield is located in USDA Plant Hardiness Zone 6a. 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 | 15.8 °F | 40.5 °F | 0.5 in. |
| February | 20.5 °F | 46.1 °F | 0.54 in. |
| March | 26.3 °F | 55.5 °F | 0.76 in. |
| April | 31.2 °F | 62.3 °F | 0.73 in. |
| May | 38.9 °F | 71.7 °F | 1.06 in. |
| June | 46.8 °F | 83.3 °F | 0.46 in. |
| July | 54.4 °F | 90.2 °F | 0.71 in. |
| August | 52.8 °F | 88.1 °F | 0.74 in. |
| September | 43.4 °F | 80.0 °F | 0.81 in. |
| October | 32.4 °F | 66.8 °F | 0.98 in. |
| November | 22.8 °F | 52.3 °F | 0.54 in. |
| December | 15.3 °F | 40.5 °F | 0.66 in. |
| Annual | 33.4 °F | 64.8 °F | 8.49 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |