Elmo, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.3 °F (low) to 62.7 °F (high). Annual precipitation averages 8.7 Inches. Elmo is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.0 °F | 36.6 °F | 0.71 in. |
| February | 18.0 °F | 42.2 °F | 0.68 in. |
| March | 26.0 °F | 53.5 °F | 0.63 in. |
| April | 31.6 °F | 61.4 °F | 0.61 in. |
| May | 40.2 °F | 70.8 °F | 0.6 in. |
| June | 48.5 °F | 82.2 °F | 0.48 in. |
| July | 55.5 °F | 89.1 °F | 0.79 in. |
| August | 53.6 °F | 86.7 °F | 0.92 in. |
| September | 44.9 °F | 78.1 °F | 1.16 in. |
| October | 33.2 °F | 64.5 °F | 1.2 in. |
| November | 22.2 °F | 49.7 °F | 0.44 in. |
| December | 13.6 °F | 37.4 °F | 0.5 in. |
| Annual | 33.3 °F | 62.7 °F | 8.72 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |