| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| 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: | 64e - Glaciated Triassic Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 07940 - Madison, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 20 | 29 | 38 | 48 | 57 | 62 | 61 | 53 | 41 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 38 | 41 | 50 | 61 | 72 | 81 | 85 | 83 | 76 | 65 | 54 | 43 | 63 |
| Avg Precip (In.) | 4.11 | 3 | 4.16 | 4.27 | 4.79 | 4.22 | 4.88 | 4.45 | 4.91 | 3.99 | 4.27 | 3.89 | 50.94 |