Ray, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28 °F (low) to 50.8 °F (high). Annual precipitation averages 16 Inches. 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 | -0.6 °F | 18.4 °F | 0.53 in. |
| February | 3.7 °F | 23.2 °F | 0.39 in. |
| March | 15.1 °F | 35.4 °F | 0.62 in. |
| April | 27.6 °F | 51.9 °F | 0.98 in. |
| May | 39.3 °F | 64.4 °F | 2.28 in. |
| June | 49.9 °F | 73.0 °F | 3.07 in. |
| July | 54.4 °F | 79.6 °F | 2.71 in. |
| August | 52.4 °F | 80.8 °F | 1.71 in. |
| September | 42.4 °F | 70.4 °F | 1.43 in. |
| October | 30.1 °F | 53.5 °F | 1.06 in. |
| November | 16.9 °F | 36.1 °F | 0.61 in. |
| December | 5.0 °F | 22.9 °F | 0.62 in. |
| Annual | 28 °F | 50.8 °F | 16.01 in. |
| 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 : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |