Big Water, Utah has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 6.9 °C (low) to 22.8 °C (high). Annual precipitation averages 177 Millimeters. Big Water is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.2 °C | 8.1 °C | 12.95 mm |
| February | -1.6 °C | 11.8 °C | 17.02 mm |
| March | 2 °C | 17.6 °C | 14.48 mm |
| April | 5.6 °C | 22.7 °C | 10.16 mm |
| May | 10.2 °C | 28.3 °C | 9.65 mm |
| June | 15.3 °C | 34.9 °C | 3.3 mm |
| July | 19.8 °C | 37.6 °C | 15.49 mm |
| August | 18.8 °C | 35.8 °C | 19.56 mm |
| September | 13.7 °C | 31.3 °C | 18.8 mm |
| October | 7 °C | 23.2 °C | 28.45 mm |
| November | 0.3 °C | 14.4 °C | 12.45 mm |
| December | -4.1 °C | 8 °C | 14.73 mm |
| Annual | 6.9 °C | 22.8 °C | 177.04 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |