| 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: | 67a - Northern Limestone/Dolomite Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 08886 - Stewartsville, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 19 | 28 | 37 | 47 | 56 | 61 | 59 | 51 | 40 | 32 | 23 | 39 |
| Avg Max Temp (°F) | 37 | 40 | 50 | 62 | 72 | 80 | 85 | 83 | 75 | 65 | 53 | 42 | 62 |
| Avg Precip (In.) | 3.88 | 2.87 | 3.83 | 3.9 | 4.65 | 4.24 | 4.53 | 4.23 | 4.56 | 3.59 | 3.92 | 3.69 | 47.89 |