| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| 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: | 50c - St. Croix Pine Barrens | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54872 - Siren, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -2 | 5 | 18 | 31 | 44 | 53 | 58 | 56 | 46 | 35 | 22 | 6 | 31 |
| Avg Max Temp (°F) | 20 | 27 | 39 | 55 | 69 | 76 | 80 | 78 | 68 | 56 | 38 | 24 | 52 |
| Avg Precip (In.) | 1.03 | .78 | 1.68 | 2.29 | 3.33 | 4.28 | 4.29 | 4.48 | 3.59 | 2.48 | 2.01 | 1.01 | 31.25 |