Big Valley, Alberta climate data is summarized below. Average annual temperatures range from -2.6 °C (low) to 9.1 °C (high). Annual precipitation averages 435 Millimeters. Big Valley is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.48 °C | -5.47 °C | 0 mm |
| February | -15.65 °C | -4.96 °C | 0 mm |
| March | -8.79 °C | 1.53 °C | 0 mm |
| April | -2.5 °C | 9.64 °C | 34 mm |
| May | 3.77 °C | 17.17 °C | 60 mm |
| June | 8.71 °C | 20.72 °C | 110 mm |
| July | 11.34 °C | 23.86 °C | 90 mm |
| August | 9.82 °C | 22.94 °C | 64 mm |
| September | 4.77 °C | 18.7 °C | 49 mm |
| October | -0.92 °C | 10.92 °C | 28 mm |
| November | -9.05 °C | 0.8 °C | 0 mm |
| December | -17.02 °C | -7.06 °C | 0 mm |
| Annual | -2.6 °C | 9.1 °C | 435 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |