Hyrum, Utah has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 34.9 °F (low) to 59.8 °F (high). Annual precipitation averages 19.1 Inches. Hyrum 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.9 °F | 33.4 °F | 2.01 in. |
| February | 18.9 °F | 37.7 °F | 1.6 in. |
| March | 27.8 °F | 49.0 °F | 2.17 in. |
| April | 33.6 °F | 57.4 °F | 2.19 in. |
| May | 41.0 °F | 66.9 °F | 2.34 in. |
| June | 47.7 °F | 78.2 °F | 1.23 in. |
| July | 56.0 °F | 88.4 °F | 0.65 in. |
| August | 54.7 °F | 87.1 °F | 0.71 in. |
| September | 45.6 °F | 76.4 °F | 1.34 in. |
| October | 34.5 °F | 61.9 °F | 1.82 in. |
| November | 25.8 °F | 46.5 °F | 1.37 in. |
| December | 17.1 °F | 34.5 °F | 1.63 in. |
| Annual | 34.9 °F | 59.8 °F | 19.06 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |