Forest Junction, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.2 °F (low) to 54.6 °F (high). Annual precipitation averages 32.3 Inches. Forest Junction 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 | 10.2 °F | 25.3 °F | 1.38 in. |
| February | 12.1 °F | 28.7 °F | 1.1 in. |
| March | 22.4 °F | 40.2 °F | 1.72 in. |
| April | 34.1 °F | 53.8 °F | 3.05 in. |
| May | 46.0 °F | 66.7 °F | 3.68 in. |
| June | 56.3 °F | 76.3 °F | 4.59 in. |
| July | 60.4 °F | 80.8 °F | 3.78 in. |
| August | 58.5 °F | 79.0 °F | 3.44 in. |
| September | 50.7 °F | 72.1 °F | 3.18 in. |
| October | 39.1 °F | 58.0 °F | 2.87 in. |
| November | 28.2 °F | 43.8 °F | 1.93 in. |
| December | 16.9 °F | 30.8 °F | 1.6 in. |
| Annual | 36.2 °F | 54.6 °F | 32.32 in. |
| 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |