Phillips, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.8 °C (low) to 10.8 °C (high). Annual precipitation averages 833.9 Millimeters. Phillips 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 | -16.7 °C | -6.1 °C | 28.7 mm |
| February | -15.8 °C | -3.4 °C | 26.16 mm |
| March | -9.3 °C | 3.2 °C | 40.89 mm |
| April | -1.7 °C | 10.7 °C | 71.63 mm |
| May | 5.4 °C | 18.3 °C | 95.25 mm |
| June | 11 °C | 23.4 °C | 115.06 mm |
| July | 13.3 °C | 25.6 °C | 101.09 mm |
| August | 12 °C | 24.5 °C | 95.5 mm |
| September | 7.8 °C | 20.2 °C | 93.47 mm |
| October | 1.3 °C | 12.3 °C | 82.55 mm |
| November | -5.2 °C | 3.7 °C | 47.75 mm |
| December | -12.2 °C | -3.2 °C | 35.81 mm |
| Annual | -0.8 °C | 10.8 °C | 833.86 mm |
| 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 : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |