| 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. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| 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 54241 - Two Rivers, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 14 | 24 | 35 | 44 | 53 | 60 | 60 | 52 | 41 | 29 | 17 | 37 |
| Avg Max Temp (°F) | 26 | 29 | 37 | 49 | 61 | 71 | 76 | 74 | 67 | 55 | 42 | 30 | 51 |
| Avg Precip (In.) | 1.66 | 1.3 | 2.27 | 2.83 | 2.85 | 3.19 | 2.96 | 3.65 | 3.27 | 2.32 | 2.3 | 1.76 | 30.35 |