| 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: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 58h - Reading Prong | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 07960 - Morristown, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 37 | 46 | 55 | 60 | 59 | 51 | 39 | 32 | 23 | 39 |
| Avg Max Temp (°F) | 38 | 40 | 50 | 61 | 71 | 80 | 85 | 83 | 75 | 64 | 53 | 42 | 62 |
| Avg Precip (In.) | 4.24 | 3 | 4.26 | 4.45 | 4.94 | 4.32 | 5.04 | 4.4 | 5.07 | 4.03 | 4.27 | 3.97 | 51.99 |