Spanish Valley, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.3 °C (low) to 20.4 °C (high). Annual precipitation averages 283 Millimeters. Spanish Valley is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.4 °C | 5.2 °C | 16.51 mm |
| February | -4.2 °C | 9.2 °C | 19.56 mm |
| March | -0.1 °C | 15.3 °C | 22.35 mm |
| April | 3.2 °C | 19.7 °C | 28.45 mm |
| May | 8.1 °C | 25.5 °C | 22.86 mm |
| June | 13.3 °C | 32.2 °C | 11.68 mm |
| July | 17.2 °C | 35.4 °C | 22.1 mm |
| August | 16.1 °C | 33.9 °C | 27.94 mm |
| September | 11.2 °C | 29 °C | 29.21 mm |
| October | 3.8 °C | 21.2 °C | 34.54 mm |
| November | -2.2 °C | 12.6 °C | 24.64 mm |
| December | -7.2 °C | 5.5 °C | 23.11 mm |
| Annual | 4.3 °C | 20.4 °C | 282.95 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |