| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 51f - Green Bay Till and Lacustrine Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54124 - Gillett, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 7 | 19 | 31 | 42 | 52 | 57 | 55 | 46 | 35 | 24 | 10 | 32 |
| Avg Max Temp (°F) | 23 | 29 | 39 | 54 | 68 | 77 | 81 | 78 | 69 | 58 | 41 | 28 | 54 |
| Avg Precip (In.) | 1.39 | 1.03 | 2.05 | 2.81 | 3.42 | 3.64 | 3.66 | 3.86 | 3.58 | 2.42 | 2.46 | 1.53 | 31.86 |