Average Soil Temperature in Bethlehem, PA — September 2025
Data from Avondale 2 N (55.5 mi away) • 30 of 30 days reported
Monthly Summary by Depth
2" depth
66.1°F
avg
63.5°F – 68.7°F
30 days
4" depth
65.9°F
avg
64°F – 68°F
30 days
8" depth
65.7°F
avg
64.2°F – 67.6°F
30 days
20" depth
66.5°F
avg
65.7°F – 67.6°F
30 days
40" depth
66.6°F
avg
65.5°F – 68.2°F
30 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Sep 1 | 64.8°F | 64.9°F | 65.1°F | 66.6°F | 68.2°F |
| Sep 2 | 64.6°F | 64.8°F | 64.9°F | 66.4°F | 68°F |
| Sep 3 | 65.5°F | 65.3°F | 65.1°F | 66.4°F | 67.6°F |
| Sep 4 | 66.4°F | 65.8°F | 65.7°F | 66.6°F | 67.6°F |
| Sep 5 | 67.8°F | 67.1°F | 66.7°F | 66.9°F | 67.3°F |
| Sep 6 | 68.7°F | 68°F | 67.6°F | 67.5°F | 67.8°F |
| Sep 7 | 67.6°F | 67.6°F | 67.6°F | 67.6°F | 68.2°F |
| Sep 8 | 64.4°F | 65.3°F | 65.5°F | 67.3°F | 68.2°F |
| Sep 9 | 63.5°F | 64°F | 64.2°F | 66.4°F | 67.3°F |
| Sep 10 | 64.6°F | 64.8°F | 64.6°F | 66°F | 66.4°F |
| Sep 11 | 65.7°F | 65.3°F | 64.9°F | 66°F | 66.2°F |
| Sep 12 | 64.6°F | 64.8°F | 64.8°F | 65.8°F | 66°F |
| Sep 13 | 65.7°F | 65.3°F | 64.9°F | 65.8°F | 65.8°F |
| Sep 14 | 66.2°F | 65.8°F | 65.5°F | 66°F | 65.8°F |
| Sep 15 | 66°F | 65.8°F | 65.7°F | 66.2°F | 65.8°F |
| Sep 16 | 65.1°F | 65.3°F | 65.3°F | 66.2°F | 66°F |
| Sep 17 | 65.1°F | 65.1°F | 64.9°F | 65.8°F | 65.8°F |
| Sep 18 | 66.4°F | 65.8°F | 65.3°F | 65.8°F | 66°F |
| Sep 19 | 66.2°F | 66°F | 65.7°F | 66.2°F | 65.7°F |
| Sep 20 | 66°F | 66°F | 65.7°F | 66.2°F | 65.8°F |
| Sep 21 | 65.1°F | 65.3°F | 65.3°F | 66.2°F | 65.8°F |
| Sep 22 | 64.4°F | 64.6°F | 64.6°F | 65.8°F | 65.7°F |
| Sep 23 | 66.2°F | 65.5°F | 64.9°F | 65.7°F | 65.5°F |
| Sep 24 | 66.9°F | 66.4°F | 66°F | 66.2°F | 66.2°F |
| Sep 25 | 68.4°F | 67.5°F | 66.9°F | 66.6°F | 66.2°F |
| Sep 26 | 67.8°F | 67.5°F | 67.1°F | 67.1°F | 66.2°F |
| Sep 27 | 66.7°F | 66.7°F | 66.6°F | 67.1°F | 66.4°F |
| Sep 28 | 67.6°F | 67.3°F | 66.9°F | 67.1°F | 66.4°F |
| Sep 29 | 66.9°F | 66.9°F | 66.7°F | 67.1°F | 66.4°F |
| Sep 30 | 66.9°F | 66.7°F | 66.6°F | 67.1°F | 66.7°F |