| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 67j - Northern Glaciated Limestone Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 07823 - Belvidere, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 18 | 27 | 36 | 46 | 55 | 60 | 59 | 51 | 39 | 31 | 22 | 39 |
| Avg Max Temp (°F) | 36 | 39 | 49 | 61 | 71 | 79 | 83 | 81 | 74 | 63 | 52 | 41 | 61 |
| Avg Precip (In.) | 3.85 | 2.9 | 3.89 | 4.01 | 4.71 | 4.37 | 4.51 | 4.29 | 4.69 | 3.66 | 3.99 | 3.71 | 48.58 |