Orrin, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2 °C (low) to 10.4 °C (high). Annual precipitation averages 497.6 Millimeters. Orrin is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.9 °C | -8.3 °C | 12.45 mm |
| February | -17.1 °C | -5.8 °C | 12.7 mm |
| March | -9.9 °C | 1.1 °C | 18.03 mm |
| April | -2.2 °C | 11.1 °C | 28.45 mm |
| May | 5.1 °C | 18.7 °C | 67.06 mm |
| June | 11.3 °C | 23.6 °C | 99.82 mm |
| July | 13.7 °C | 26.9 °C | 83.31 mm |
| August | 12.1 °C | 26.9 °C | 57.91 mm |
| September | 6.8 °C | 21.5 °C | 45.21 mm |
| October | -0.5 °C | 12.4 °C | 36.83 mm |
| November | -8.3 °C | 2.3 °C | 20.07 mm |
| December | -15.5 °C | -5.6 °C | 15.75 mm |
| Annual | -2 °C | 10.4 °C | 497.59 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |