| 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. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64b - Trap Rock and Conglomerate Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 07009 - Cedar Grove, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 49 | 59 | 64 | 62 | 55 | 43 | 35 | 26 | 42 |
| Avg Max Temp (°F) | 38 | 40 | 50 | 61 | 71 | 80 | 85 | 83 | 76 | 65 | 53 | 42 | 62 |
| Avg Precip (In.) | 4.05 | 3.02 | 4.21 | 4.34 | 4.79 | 4.24 | 4.67 | 4.34 | 4.99 | 3.94 | 4.26 | 3.9 | 50.75 |