| 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 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 58i - Glaciated Reading Prong | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 07405 - Butler, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 27 | 37 | 47 | 56 | 61 | 59 | 51 | 39 | 32 | 23 | 39 |
| Avg Max Temp (°F) | 37 | 40 | 49 | 60 | 71 | 79 | 84 | 83 | 75 | 64 | 53 | 42 | 61 |
| Avg Precip (In.) | 4.04 | 3.06 | 4.24 | 4.32 | 4.73 | 4.36 | 4.46 | 4.3 | 4.81 | 3.87 | 4.23 | 3.9 | 50.31 |