Rubicon, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 12.8 °C (high). Annual precipitation averages 877.8 Millimeters. Rubicon is located in USDA Plant Hardiness Zone 5a. 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 | -12.4 °C | -3.3 °C | 39.88 mm |
| February | -10.9 °C | -1.3 °C | 35.05 mm |
| March | -5.2 °C | 5.2 °C | 47.5 mm |
| April | 1.1 °C | 12.5 °C | 90.17 mm |
| May | 7.3 °C | 19.2 °C | 99.31 mm |
| June | 12.9 °C | 24.6 °C | 119.13 mm |
| July | 15.4 °C | 26.9 °C | 101.35 mm |
| August | 14.2 °C | 25.9 °C | 96.77 mm |
| September | 9.8 °C | 22.2 °C | 80.77 mm |
| October | 3.6 °C | 14.8 °C | 72.39 mm |
| November | -2.6 °C | 6.8 °C | 51.31 mm |
| December | -8.6 °C | -0.2 °C | 44.2 mm |
| Annual | 2.1 °C | 12.8 °C | 877.83 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |