Average Soil Temperature in Sun Valley, ID — December 2025
Data from Arco 17 SW (41.6 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
31°F
avg
26.4°F – 33.6°F
31 days
4" depth
30.8°F
avg
27.1°F – 32.2°F
31 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| Dec 1 | 28.2°F | 28.8°F |
| Dec 2 | 27.5°F | 28.2°F |
| Dec 3 | 26.4°F | 27.1°F |
| Dec 4 | 26.8°F | 27.3°F |
| Dec 5 | 27.1°F | 27.7°F |
| Dec 6 | 30°F | 29.8°F |
| Dec 7 | 28.8°F | 28.9°F |
| Dec 8 | 28.9°F | 29.1°F |
| Dec 9 | 31.1°F | 30.7°F |
| Dec 10 | 32.5°F | 31.3°F |
| Dec 11 | 33.6°F | 31.5°F |
| Dec 12 | 33.3°F | 31.6°F |
| Dec 13 | 32.9°F | 31.6°F |
| Dec 14 | 31.8°F | 31.6°F |
| Dec 15 | 30.2°F | 30.4°F |
| Dec 16 | 32.5°F | 31.3°F |
| Dec 17 | 33.6°F | 31.6°F |
| Dec 18 | 32.2°F | 31.8°F |
| Dec 19 | 32°F | 31.8°F |
| Dec 20 | 31.8°F | 32°F |
| Dec 21 | 31.8°F | 32°F |
| Dec 22 | 31.8°F | 31.8°F |
| Dec 23 | 32.5°F | 31.8°F |
| Dec 24 | 32.7°F | 31.8°F |
| Dec 25 | 33.6°F | 32°F |
| Dec 26 | 32.7°F | 32.2°F |
| Dec 27 | 32.2°F | 32°F |
| Dec 28 | 31.6°F | 32°F |
| Dec 29 | 30.6°F | 31.8°F |
| Dec 30 | 29.8°F | 31.5°F |
| Dec 31 | 30°F | 31.3°F |