Rhinelander, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.9 °C (low) to 10.8 °C (high). Annual precipitation averages 845 Millimeters. Rhinelander 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 | -16.3 °C | -5.9 °C | 30.73 mm |
| February | -15.6 °C | -3.2 °C | 28.45 mm |
| March | -9.6 °C | 3.2 °C | 43.69 mm |
| April | -2.3 °C | 10.5 °C | 75.69 mm |
| May | 5.2 °C | 18.4 °C | 91.44 mm |
| June | 10.8 °C | 23.3 °C | 113.54 mm |
| July | 13.2 °C | 25.7 °C | 104.9 mm |
| August | 12 °C | 24.5 °C | 86.61 mm |
| September | 7.8 °C | 20.1 °C | 95.5 mm |
| October | 1.3 °C | 12.2 °C | 84.58 mm |
| November | -5.1 °C | 3.7 °C | 49.78 mm |
| December | -12.1 °C | -3.3 °C | 40.13 mm |
| Annual | -0.9 °C | 10.8 °C | 845.04 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |