Average Soil Temperature in O Fallon, MO for September 2026
Data from Elsberry PMC (22.8 mi away) • 25 of 30 days reported
Monthly Summary by Depth
2" depth
76.2°F
avg
68°F – 80.4°F
25 days
4" depth
76.6°F
avg
68.9°F – 81°F
25 days
8" depth
76.1°F
avg
70°F – 79.5°F
25 days
20" depth
75.9°F
avg
72.1°F – 77.5°F
25 days
40" depth
72.4°F
avg
71.4°F – 73°F
25 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Sep 1 | 79.2°F | 79.5°F | 77.7°F | 76.1°F | 71.8°F |
| Sep 2 | 80.1°F | 80.1°F | 78.6°F | 76.6°F | 71.8°F |
| Sep 3 | 80.1°F | 80.1°F | 79.2°F | 77°F | 72.3°F |
| Sep 4 | 80.4°F | 81°F | 79.5°F | 77.4°F | 72.3°F |
| Sep 5 | 80.2°F | 80.4°F | 79.2°F | 77.5°F | 72.7°F |
| Sep 6 | 78.1°F | 79.2°F | 78.6°F | 77.5°F | 72.7°F |
| Sep 7 | 75.6°F | 76.8°F | 76.8°F | 77.2°F | 73°F |
| Sep 8 | 77.7°F | 78.1°F | 77.2°F | 76.6°F | 73°F |
| Sep 9 | 78.4°F | 78.6°F | 77.7°F | 76.6°F | 72.7°F |
| Sep 10 | 76.1°F | 76.5°F | 76.5°F | 76.5°F | 72.7°F |
| Sep 11 | 75.7°F | 76.5°F | 76.5°F | 76.1°F | 72.7°F |
| Sep 12 | 75.9°F | 76.5°F | 75.9°F | 75.9°F | 72.7°F |
| Sep 13 | 73.6°F | 74.3°F | 74.7°F | 75.7°F | 72.7°F |
| Sep 14 | 75.2°F | 75°F | 74.7°F | 75.2°F | 72.3°F |
| Sep 15 | 77.9°F | 78.1°F | 76.5°F | 75.4°F | 72.3°F |
| Sep 16 | 78.1°F | 78.1°F | 76.8°F | 75.7°F | 72.3°F |
| Sep 17 | 78.4°F | 78.6°F | 77.2°F | 76.1°F | 72.3°F |
| Sep 18 | 78.4°F | 78.6°F | 77.7°F | 76.3°F | 72.3°F |
| Sep 19 | 76.6°F | 77.2°F | 77.2°F | 76.5°F | 72.7°F |
| Sep 20 | 75°F | 75.9°F | 76.5°F | 76.3°F | 72.7°F |
| Sep 21 | 73.9°F | 74.3°F | 73.9°F | 75.7°F | 72.7°F |
| Sep 22 | 72°F | 72.3°F | 72.7°F | 74.8°F | 72.3°F |
| Sep 23 | 70.5°F | 70.7°F | 71.1°F | 73.8°F | 72.3°F |
| Sep 24 | 68°F | 68.9°F | 70°F | 73°F | 72.3°F |
| Sep 25 | 70.3°F | 70.7°F | 70°F | 72.1°F | 71.4°F |