| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F 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: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64e - Glaciated Triassic Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 07204 - Roselle Park, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 23 | 31 | 40 | 50 | 60 | 65 | 64 | 56 | 44 | 36 | 27 | 43 |
| Avg Max Temp (°F) | 39 | 42 | 51 | 62 | 72 | 81 | 86 | 84 | 76 | 65 | 54 | 43 | 63 |
| Avg Precip (In.) | 4 | 3.02 | 4.2 | 4.12 | 4.69 | 3.9 | 4.93 | 4.31 | 4.53 | 3.77 | 4.18 | 3.84 | 49.5 |