Campbellsport, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.2 °F (low) to 55.1 °F (high). Annual precipitation averages 34.3 Inches. Campbellsport 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 | 10.3 °F | 26.1 °F | 1.53 in. |
| February | 13.0 °F | 29.9 °F | 1.37 in. |
| March | 22.9 °F | 41.4 °F | 1.93 in. |
| April | 34.2 °F | 54.2 °F | 3.57 in. |
| May | 45.6 °F | 66.6 °F | 3.8 in. |
| June | 55.5 °F | 76.5 °F | 4.36 in. |
| July | 60.1 °F | 80.7 °F | 4.0 in. |
| August | 58.4 °F | 78.9 °F | 3.85 in. |
| September | 50.5 °F | 72.0 °F | 3.25 in. |
| October | 38.9 °F | 58.9 °F | 2.89 in. |
| November | 27.7 °F | 44.3 °F | 1.98 in. |
| December | 17.1 °F | 31.9 °F | 1.72 in. |
| Annual | 36.2 °F | 55.1 °F | 34.25 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |