Pettibone, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30 °F (low) to 51.3 °F (high). Annual precipitation averages 19.4 Inches. Pettibone 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 | 18.0 °F | 0.47 in. |
| February | 4.0 °F | 22.6 °F | 0.43 in. |
| March | 15.7 °F | 35.0 °F | 0.57 in. |
| April | 29.0 °F | 52.4 °F | 1.16 in. |
| May | 41.8 °F | 65.4 °F | 2.77 in. |
| June | 53.0 °F | 75.1 °F | 3.58 in. |
| July | 57.8 °F | 80.6 °F | 3.37 in. |
| August | 55.2 °F | 80.3 °F | 2.26 in. |
| September | 46.0 °F | 70.7 °F | 1.97 in. |
| October | 32.7 °F | 54.5 °F | 1.6 in. |
| November | 18.5 °F | 37.2 °F | 0.64 in. |
| December | 6.7 °F | 23.3 °F | 0.61 in. |
| Annual | 30 °F | 51.3 °F | 19.43 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 |