| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 52a - Savanna Section | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53818 - Platteville, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 13 | 24 | 35 | 46 | 56 | 61 | 59 | 50 | 39 | 26 | 14 | 36 |
| Avg Max Temp (°F) | 25 | 31 | 43 | 58 | 70 | 79 | 83 | 80 | 72 | 61 | 43 | 30 | 56 |
| Avg Precip (In.) | 1.12 | 1.26 | 2.23 | 3.5 | 3.89 | 4.94 | 4.46 | 4.45 | 3.54 | 2.57 | 2.45 | 1.46 | 35.86 |