Plaza, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29 °F (low) to 50.8 °F (high). Annual precipitation averages 17.2 Inches. Plaza 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 | -0.1 °F | 18.2 °F | 0.44 in. |
| February | 3.8 °F | 22.8 °F | 0.43 in. |
| March | 15.5 °F | 35.1 °F | 0.64 in. |
| April | 28.1 °F | 52.3 °F | 0.98 in. |
| May | 40.4 °F | 64.7 °F | 2.59 in. |
| June | 51.1 °F | 73.2 °F | 3.6 in. |
| July | 55.6 °F | 79.8 °F | 2.47 in. |
| August | 53.1 °F | 80.3 °F | 1.88 in. |
| September | 43.6 °F | 69.9 °F | 1.72 in. |
| October | 31.6 °F | 53.9 °F | 1.25 in. |
| November | 18.2 °F | 36.4 °F | 0.63 in. |
| December | 6.7 °F | 23.1 °F | 0.53 in. |
| Annual | 29 °F | 50.8 °F | 17.16 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |