Arpin, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.1 °C (low) to 12.2 °C (high). Annual precipitation averages 837.7 Millimeters. Arpin is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.3 °C | -4.6 °C | 27.69 mm |
| February | -12.8 °C | -2.1 °C | 25.65 mm |
| March | -6.5 °C | 4.6 °C | 43.43 mm |
| April | 0.5 °C | 12.6 °C | 80.26 mm |
| May | 7.3 °C | 19.4 °C | 99.06 mm |
| June | 12.8 °C | 24.5 °C | 118.62 mm |
| July | 14.9 °C | 26.9 °C | 95 mm |
| August | 13.8 °C | 25.8 °C | 100.33 mm |
| September | 9.2 °C | 21.6 °C | 92.71 mm |
| October | 2.7 °C | 14.1 °C | 71.88 mm |
| November | -3.7 °C | 5.4 °C | 46.48 mm |
| December | -10.3 °C | -1.7 °C | 36.58 mm |
| Annual | 1.1 °C | 12.2 °C | 837.69 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |