Pray, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Annual precipitation averages 344.9 Millimeters. Pray is located in USDA Plant Hardiness Zone 5a. 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 | -8.4 °C | 1.8 °C | 11.18 mm |
| February | -8.1 °C | 3.2 °C | 12.7 mm |
| March | -4.5 °C | 8.2 °C | 17.27 mm |
| April | -1.1 °C | 12.6 °C | 34.29 mm |
| May | 3.1 °C | 17.6 °C | 47.24 mm |
| June | 6.8 °C | 22.5 °C | 58.42 mm |
| July | 10.2 °C | 28.4 °C | 37.85 mm |
| August | 9.2 °C | 28.1 °C | 32.26 mm |
| September | 5.4 °C | 22.4 °C | 30.99 mm |
| October | 0.3 °C | 14.3 °C | 27.69 mm |
| November | -4.6 °C | 6.4 °C | 20.83 mm |
| December | -8.4 °C | 1.3 °C | 14.22 mm |
| Annual | -0 °C | 13.9 °C | 344.94 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |