Average Soil Temperature in Belleville, IL for September 2026
Data from Shaw Nature Reserve (44.5 mi away) • 25 of 30 days reported
Monthly Summary by Depth
2" depth
78.4°F
avg
68.5°F – 82.9°F
25 days
4" depth
78.9°F
avg
70°F – 83.1°F
25 days
8" depth
79.4°F
avg
72.3°F – 82.8°F
25 days
20" depth
77.8°F
avg
73.6°F – 79.3°F
25 days
40" depth
74.7°F
avg
73.9°F – 75°F
25 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Sep 1 | 80.4°F | 81.1°F | 81°F | 77.7°F | 74.3°F |
| Sep 2 | 81.5°F | 82°F | 81.7°F | 78.3°F | 74.3°F |
| Sep 3 | 82°F | 82.4°F | 82°F | 78.6°F | 74.7°F |
| Sep 4 | 82°F | 82.4°F | 82.2°F | 79°F | 74.7°F |
| Sep 5 | 82.9°F | 83.1°F | 82.8°F | 79.2°F | 74.7°F |
| Sep 6 | 81°F | 81.5°F | 82°F | 79.3°F | 75°F |
| Sep 7 | 77.7°F | 78.8°F | 80.1°F | 79°F | 75°F |
| Sep 8 | 78.1°F | 79°F | 79.3°F | 78.1°F | 75°F |
| Sep 9 | 78.1°F | 77.9°F | 79.5°F | 78.6°F | 75°F |
| Sep 10 | 76.8°F | 77.5°F | 78.3°F | 77.7°F | 75°F |
| Sep 11 | 77.7°F | 78.1°F | 78.6°F | 77.4°F | 74.7°F |
| Sep 12 | 79.2°F | 79.7°F | 79.9°F | 77.4°F | 74.7°F |
| Sep 13 | 77.2°F | 78.1°F | 79°F | 77.5°F | 74.7°F |
| Sep 14 | 77.7°F | 77.9°F | 78.3°F | 77.2°F | 74.7°F |
| Sep 15 | 81°F | 81°F | 80.6°F | 77.4°F | 74.7°F |
| Sep 16 | 80.4°F | 81°F | 81°F | 78.1°F | 74.7°F |
| Sep 17 | 81.5°F | 81.7°F | 81.5°F | 78.3°F | 74.7°F |
| Sep 18 | 82°F | 82.2°F | 82°F | 78.6°F | 74.7°F |
| Sep 19 | 80.1°F | 80.8°F | 81.5°F | 79°F | 74.7°F |
| Sep 20 | 80.1°F | 80.6°F | 81°F | 78.6°F | 75°F |
| Sep 21 | 76.5°F | 76.8°F | 77.9°F | 78.1°F | 75°F |
| Sep 22 | 73.4°F | 74.1°F | 75.7°F | 77°F | 75°F |
| Sep 23 | 72.7°F | 73.4°F | 74.7°F | 75.7°F | 74.7°F |
| Sep 24 | 68.5°F | 70°F | 72.3°F | 74.8°F | 74.3°F |
| Sep 25 | 71.1°F | 71.6°F | 72.5°F | 73.6°F | 73.9°F |