| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 53d - Lake Michigan Lacustrine Clay Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54115 - De Pere, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 12 | 23 | 34 | 45 | 54 | 59 | 57 | 48 | 38 | 26 | 14 | 35 |
| Avg Max Temp (°F) | 24 | 28 | 39 | 54 | 67 | 76 | 80 | 78 | 70 | 57 | 42 | 29 | 54 |
| Avg Precip (In.) | 1.29 | 1.03 | 2.04 | 2.58 | 2.81 | 3.47 | 3.42 | 3.77 | 3.16 | 2.2 | 2.28 | 1.44 | 29.48 |