Navarino, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 12.7 °C (high). Annual precipitation averages 842.5 Millimeters. Navarino 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 | -13 °C | -3.8 °C | 34.54 mm |
| February | -12.1 °C | -1.7 °C | 29.46 mm |
| March | -6.1 °C | 4.7 °C | 46.48 mm |
| April | 0.6 °C | 12.5 °C | 80.01 mm |
| May | 7.3 °C | 19.7 °C | 92.2 mm |
| June | 12.9 °C | 24.9 °C | 112.27 mm |
| July | 15.2 °C | 27.3 °C | 98.55 mm |
| August | 14.2 °C | 26.3 °C | 92.46 mm |
| September | 9.6 °C | 22.1 °C | 90.93 mm |
| October | 3.1 °C | 14.4 °C | 76.71 mm |
| November | -2.9 °C | 6.3 °C | 47.5 mm |
| December | -9.2 °C | -0.9 °C | 41.4 mm |
| Annual | 1.6 °C | 12.7 °C | 842.51 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 | Dfb - Humid Continental Mild Summer, Wet All Year |