| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°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: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 53d - Lake Michigan Lacustrine Clay Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53004 - Belgium, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 26 | 36 | 46 | 55 | 62 | 62 | 53 | 43 | 30 | 18 | 38 |
| Avg Max Temp (°F) | 27 | 31 | 41 | 52 | 64 | 74 | 79 | 78 | 70 | 59 | 44 | 32 | 54 |
| Avg Precip (In.) | 1.5 | 1.21 | 2.02 | 3.17 | 2.96 | 3.59 | 3.71 | 4.16 | 3.49 | 2.41 | 2.37 | 1.83 | 32.42 |