Average Soil Temperature in Sun Valley, ID — January 2026
Data from Arco 17 SW (41.6 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
27.9°F
avg
20.1°F – 31.6°F
31 days
4" depth
28°F
avg
19.6°F – 31.6°F
31 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| Jan 1 | 31.3°F | 31.5°F |
| Jan 2 | 31.5°F | 31.5°F |
| Jan 3 | 31.6°F | 31.5°F |
| Jan 4 | 31.6°F | 31.6°F |
| Jan 5 | 31.6°F | 31.6°F |
| Jan 6 | 31.6°F | 31.6°F |
| Jan 7 | 31.6°F | 31.6°F |
| Jan 8 | 31.6°F | 31.6°F |
| Jan 9 | 30.6°F | 31.5°F |
| Jan 10 | 29.7°F | 31.1°F |
| Jan 11 | 30.4°F | 31.1°F |
| Jan 12 | 29.8°F | 30.7°F |
| Jan 13 | 29.7°F | 30.6°F |
| Jan 14 | 29.5°F | 30.4°F |
| Jan 15 | 29.5°F | 30°F |
| Jan 16 | 28.8°F | 29.7°F |
| Jan 17 | 28°F | 28.9°F |
| Jan 18 | 27.7°F | 28°F |
| Jan 19 | 26.6°F | 26.4°F |
| Jan 20 | 26.6°F | 26.4°F |
| Jan 21 | 26.2°F | 26.1°F |
| Jan 22 | 23°F | 23°F |
| Jan 23 | 24.1°F | 23.5°F |
| Jan 24 | 24.1°F | 23.9°F |
| Jan 25 | 21.6°F | 21.6°F |
| Jan 26 | 20.1°F | 19.6°F |
| Jan 27 | 22.5°F | 21.2°F |
| Jan 28 | 24.6°F | 23.4°F |
| Jan 29 | 25.9°F | 25°F |
| Jan 30 | 26.6°F | 25.9°F |
| Jan 31 | 28°F | 27.5°F |