| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64f - Passaic Basin Freshwater Wetlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 07034 - Lake Hiawatha, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 20 | 29 | 39 | 48 | 57 | 62 | 61 | 53 | 41 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 37 | 40 | 50 | 61 | 72 | 80 | 85 | 83 | 76 | 65 | 53 | 42 | 62 |
| Avg Precip (In.) | 4.05 | 3.01 | 4.22 | 4.31 | 4.78 | 4.22 | 4.71 | 4.25 | 4.97 | 3.93 | 4.18 | 3.86 | 50.47 |