Average Soil Temperature in Alpine, CA — September 2025
Data from Fallbrook 5 NE (49.2 mi away) • 30 of 30 days reported
Monthly Summary by Depth
2" depth
84.2°F
avg
74.1°F – 91.2°F
30 days
4" depth
84.6°F
avg
78.4°F – 89.8°F
30 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| Sep 1 | 90.1°F | 89.6°F |
| Sep 2 | 88.9°F | 88.7°F |
| Sep 3 | 91.2°F | 89.8°F |
| Sep 4 | 90.1°F | 89.8°F |
| Sep 5 | 88.3°F | 88.5°F |
| Sep 6 | 88.2°F | 88°F |
| Sep 7 | 89.2°F | 88.7°F |
| Sep 8 | 88.7°F | 88.5°F |
| Sep 9 | 85.8°F | 86.5°F |
| Sep 10 | 85.5°F | 86.2°F |
| Sep 11 | 84.9°F | 85.5°F |
| Sep 12 | 84.7°F | 84.9°F |
| Sep 13 | 82.6°F | 83.7°F |
| Sep 14 | 83.8°F | 83.8°F |
| Sep 15 | 86.7°F | 85.8°F |
| Sep 16 | 89.1°F | 87.4°F |
| Sep 17 | 86.7°F | 87.1°F |
| Sep 18 | 80.8°F | 83.1°F |
| Sep 19 | 81.5°F | 82.8°F |
| Sep 20 | 82°F | 83.1°F |
| Sep 21 | 74.1°F | 78.4°F |
| Sep 22 | 77.9°F | 78.6°F |
| Sep 23 | 82.9°F | 82.2°F |
| Sep 24 | 83.3°F | 83.3°F |
| Sep 25 | 81.3°F | 82.2°F |
| Sep 26 | 78.1°F | 80.2°F |
| Sep 27 | 78.4°F | 79.5°F |
| Sep 28 | 80.4°F | 80.6°F |
| Sep 29 | 80.2°F | 80.6°F |
| Sep 30 | 79.7°F | 80.6°F |