| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°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: | 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: | Rare Over 86°F |
Annual Climate Data for ZIP Code 07045 - Montville, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 38 | 48 | 57 | 62 | 60 | 52 | 40 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 37 | 40 | 49 | 60 | 71 | 80 | 85 | 83 | 75 | 64 | 53 | 42 | 62 |
| Avg Precip (In.) | 4.06 | 3.02 | 4.23 | 4.34 | 4.81 | 4.33 | 4.65 | 4.23 | 4.96 | 3.94 | 4.22 | 3.85 | 50.63 |