Average Soil Temperature in Monrovia, CA — October 2025
Data from Fallbrook 5 NE (67.4 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
73.1°F
avg
63.9°F – 79.7°F
31 days
4" depth
74°F
avg
66.7°F – 79.5°F
31 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| Oct 1 | 78.8°F | 79.5°F |
| Oct 2 | 78.8°F | 79.3°F |
| Oct 3 | 77.2°F | 78.6°F |
| Oct 4 | 77°F | 77.7°F |
| Oct 5 | 76.8°F | 77.5°F |
| Oct 6 | 77.4°F | 77.9°F |
| Oct 7 | 74.8°F | 76.3°F |
| Oct 8 | 73.8°F | 75.2°F |
| Oct 9 | 74.3°F | 75°F |
| Oct 10 | 79.7°F | 78.3°F |
| Oct 11 | 78.4°F | 78.6°F |
| Oct 12 | 75.7°F | 76.6°F |
| Oct 13 | 70.7°F | 73.8°F |
| Oct 14 | 64.4°F | 68.9°F |
| Oct 15 | 63.9°F | 66.7°F |
| Oct 16 | 65.3°F | 67.3°F |
| Oct 17 | 68.5°F | 69.4°F |
| Oct 18 | 71.1°F | 71.6°F |
| Oct 19 | 72°F | 72.3°F |
| Oct 20 | 72.5°F | 72.9°F |
| Oct 21 | 72.5°F | 73°F |
| Oct 22 | 72°F | 72.9°F |
| Oct 23 | 70.5°F | 71.6°F |
| Oct 24 | 72°F | 72.1°F |
| Oct 25 | 70.2°F | 71.4°F |
| Oct 26 | 69.6°F | 70.7°F |
| Oct 27 | 71.4°F | 71.8°F |
| Oct 28 | 73.6°F | 73°F |
| Oct 29 | 76.1°F | 75°F |
| Oct 30 | 75.7°F | 75.6°F |
| Oct 31 | 72.3°F | 73.4°F |