Estevan, Saskatchewan climate data is summarized below. Average annual temperatures range from -1.7 °C (low) to 9.9 °C (high). Annual precipitation averages 435 Millimeters. Estevan is located in USDA Plant Hardiness Zone 4a. 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 | -17.29 °C | -7.27 °C | 0 mm |
| February | -17.05 °C | -6.96 °C | 0 mm |
| March | -8.98 °C | 1.9 °C | 12 mm |
| April | -1.68 °C | 10.56 °C | 21 mm |
| May | 4.87 °C | 17.92 °C | 62 mm |
| June | 10.84 °C | 22.51 °C | 114 mm |
| July | 13.39 °C | 26.11 °C | 84 mm |
| August | 12.02 °C | 25.98 °C | 72 mm |
| September | 6.88 °C | 21.14 °C | 40 mm |
| October | 0.58 °C | 12.18 °C | 15 mm |
| November | -7.52 °C | 2.5 °C | 12 mm |
| December | -15.99 °C | -7.23 °C | 3 mm |
| Annual | -1.7 °C | 9.9 °C | 435 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |