| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 63a - Delaware River Terraces and Uplands |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 19007 - Bristol, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 25 | 32 | 41 | 51 | 60 | 66 | 64 | 57 | 45 | 36 | 28 | 44 |
| Avg Max Temp (°F) | 41 | 44 | 54 | 64 | 75 | 84 | 88 | 86 | 79 | 68 | 56 | 46 | 65 |
| Avg Precip (In.) | 3.85 | 2.92 | 4.1 | 3.88 | 4.51 | 3.97 | 4.98 | 4.76 | 4.46 | 3.43 | 3.7 | 3.7 | 48.25 |