Average Soil Temperature in Jacksonville, IL — January 2026
Data from Mason #1 (43.9 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
36.5°F
avg
31.1°F – 47.1°F
31 days
4" depth
36.6°F
avg
31.6°F – 45.3°F
31 days
8" depth
38.2°F
avg
33.1°F – 46°F
31 days
20" depth
40°F
avg
35.4°F – 45.1°F
31 days
40" depth
43.9°F
avg
39.9°F – 46.6°F
31 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Jan 1 | 39°F | 39°F | 41°F | 42.3°F | 46.6°F |
| Jan 2 | 38.3°F | 38.3°F | 40.6°F | 41.9°F | 46°F |
| Jan 3 | 38.3°F | 38.1°F | 39.7°F | 41.5°F | 45.9°F |
| Jan 4 | 38.8°F | 38.8°F | 40.3°F | 41.7°F | 45.5°F |
| Jan 5 | 40.5°F | 40.1°F | 41.4°F | 42.1°F | 45.5°F |
| Jan 6 | 41.9°F | 41.5°F | 42.8°F | 42.8°F | 45.5°F |
| Jan 7 | 41.7°F | 41.5°F | 43°F | 43.2°F | 45.5°F |
| Jan 8 | 47.1°F | 45.3°F | 46°F | 43.9°F | 45.7°F |
| Jan 9 | 43.5°F | 43.5°F | 45.1°F | 45.1°F | 45.9°F |
| Jan 10 | 42.4°F | 42.3°F | 43.7°F | 44.4°F | 46°F |
| Jan 11 | 39.2°F | 39.6°F | 41.4°F | 43.3°F | 46°F |
| Jan 12 | 39°F | 39.2°F | 40.6°F | 42.4°F | 45.9°F |
| Jan 13 | 41°F | 40.6°F | 41.9°F | 42.4°F | 45.5°F |
| Jan 14 | 38.3°F | 38.8°F | 40.6°F | 42.4°F | 45.3°F |
| Jan 15 | 36°F | 36.3°F | 38.3°F | 41°F | 45.3°F |
| Jan 16 | 37.6°F | 37.6°F | 39°F | 40.6°F | 45°F |
| Jan 17 | 35.1°F | 36°F | 37.6°F | 40.3°F | 44.6°F |
| Jan 18 | 34.3°F | 34.9°F | 36.7°F | 39.4°F | 44.1°F |
| Jan 19 | 33.4°F | 34°F | 35.8°F | 38.8°F | 43.7°F |
| Jan 20 | 33.1°F | 33.6°F | 35.1°F | 38.1°F | 43.2°F |
| Jan 21 | 33.3°F | 33.6°F | 35.2°F | 37.8°F | 42.8°F |
| Jan 22 | 33.3°F | 33.6°F | 35.1°F | 37.6°F | 42.4°F |
| Jan 23 | 32.5°F | 32.9°F | 34.5°F | 37.2°F | 42.1°F |
| Jan 24 | 32°F | 32.2°F | 34°F | 36.7°F | 41.9°F |
| Jan 25 | 32.2°F | 32.2°F | 33.8°F | 36.5°F | 41.5°F |
| Jan 26 | 32°F | 32.2°F | 33.8°F | 36.3°F | 41.2°F |
| Jan 27 | 31.8°F | 32.2°F | 33.8°F | 36.1°F | 41°F |
| Jan 28 | 31.6°F | 32.2°F | 33.4°F | 36°F | 40.6°F |
| Jan 29 | 31.5°F | 32°F | 33.3°F | 35.8°F | 40.5°F |
| Jan 30 | 31.5°F | 31.6°F | 33.1°F | 35.6°F | 40.3°F |
| Jan 31 | 31.1°F | 31.6°F | 33.1°F | 35.4°F | 39.9°F |