Marinette, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.4 °F (low) to 53 °F (high). Annual precipitation averages 32.3 Inches. Marinette is located in USDA Plant Hardiness Zone 5b. 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 | 10.0 °F | 25.5 °F | 1.58 in. |
| February | 11.0 °F | 28.5 °F | 1.21 in. |
| March | 20.7 °F | 38.5 °F | 1.83 in. |
| April | 32.3 °F | 50.1 °F | 2.89 in. |
| May | 44.3 °F | 63.4 °F | 3.49 in. |
| June | 54.6 °F | 73.5 °F | 3.68 in. |
| July | 59.3 °F | 78.7 °F | 3.81 in. |
| August | 57.9 °F | 77.1 °F | 3.21 in. |
| September | 50.3 °F | 69.7 °F | 3.27 in. |
| October | 39.0 °F | 56.4 °F | 3.33 in. |
| November | 28.5 °F | 43.1 °F | 2.14 in. |
| December | 17.4 °F | 31.2 °F | 1.82 in. |
| Annual | 35.4 °F | 53 °F | 32.26 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |