Hyrum, Utah has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from 1.6 °C (low) to 15.4 °C (high). Annual precipitation averages 484.1 Millimeters. 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 | -8.9 °C | 0.8 °C | 51.05 mm |
| February | -7.3 °C | 3.2 °C | 40.64 mm |
| March | -2.3 °C | 9.4 °C | 55.12 mm |
| April | 0.9 °C | 14.1 °C | 55.63 mm |
| May | 5 °C | 19.4 °C | 59.44 mm |
| June | 8.7 °C | 25.7 °C | 31.24 mm |
| July | 13.3 °C | 31.3 °C | 16.51 mm |
| August | 12.6 °C | 30.6 °C | 18.03 mm |
| September | 7.6 °C | 24.7 °C | 34.04 mm |
| October | 1.4 °C | 16.6 °C | 46.23 mm |
| November | -3.4 °C | 8.1 °C | 34.8 mm |
| December | -8.3 °C | 1.4 °C | 41.4 mm |
| Annual | 1.6 °C | 15.4 °C | 484.13 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |