| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 63a - Delaware River Terraces and Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 19061 - Marcus Hook, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 28 | 35 | 44 | 54 | 63 | 68 | 67 | 60 | 48 | 39 | 31 | 47 |
| Avg Max Temp (°F) | 39 | 43 | 52 | 63 | 73 | 82 | 87 | 85 | 77 | 66 | 54 | 44 | 64 |
| Avg Precip (In.) | 3.34 | 2.94 | 4.09 | 3.64 | 4.26 | 3.67 | 4.29 | 3.81 | 4.26 | 3.13 | 3.54 | 3.48 | 44.44 |