| 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 | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64a - Triassic Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 08801 - Annandale, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 37 | 47 | 56 | 61 | 60 | 52 | 40 | 32 | 24 | 40 |
| Avg Max Temp (°F) | 37 | 40 | 50 | 61 | 72 | 80 | 85 | 83 | 75 | 64 | 53 | 42 | 62 |
| Avg Precip (In.) | 4.15 | 2.97 | 4.03 | 4.13 | 4.83 | 4.35 | 4.86 | 4.17 | 4.51 | 3.8 | 3.99 | 3.88 | 49.68 |