Ray, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.2 °C (low) to 10.4 °C (high). Annual precipitation averages 406.6 Millimeters. Ray 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. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.1 °C | -7.6 °C | 13.46 mm |
| February | -15.7 °C | -4.9 °C | 9.91 mm |
| March | -9.4 °C | 1.9 °C | 15.75 mm |
| April | -2.4 °C | 11.1 °C | 24.89 mm |
| May | 4.1 °C | 18 °C | 57.91 mm |
| June | 9.9 °C | 22.8 °C | 77.98 mm |
| July | 12.4 °C | 26.4 °C | 68.83 mm |
| August | 11.3 °C | 27.1 °C | 43.43 mm |
| September | 5.8 °C | 21.3 °C | 36.32 mm |
| October | -1.1 °C | 11.9 °C | 26.92 mm |
| November | -8.4 °C | 2.3 °C | 15.49 mm |
| December | -15 °C | -5.1 °C | 15.75 mm |
| Annual | -2.2 °C | 10.4 °C | 406.64 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |