Average Soil Temperature in Olympia, WA — December 2025
Data from Quinault 4 NE (55.6 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
44.8°F
avg
38.5°F – 51.1°F
31 days
4" depth
44.8°F
avg
39°F – 50.7°F
31 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| Dec 1 | 42.1°F | 42.3°F |
| Dec 2 | 43.7°F | 43.7°F |
| Dec 3 | 44.4°F | 44.2°F |
| Dec 4 | 44.6°F | 44.6°F |
| Dec 5 | 45.7°F | 45.3°F |
| Dec 6 | 46.4°F | 46.2°F |
| Dec 7 | 46.8°F | 46.6°F |
| Dec 8 | 48.4°F | 47.8°F |
| Dec 9 | 48.4°F | 48.2°F |
| Dec 10 | 50.7°F | 50°F |
| Dec 11 | 51.1°F | 50.7°F |
| Dec 12 | 50.7°F | 50.4°F |
| Dec 13 | 49.3°F | 49.3°F |
| Dec 14 | 49.1°F | 48.7°F |
| Dec 15 | 50.9°F | 50.5°F |
| Dec 16 | 49.6°F | 49.5°F |
| Dec 17 | 47.1°F | 47.5°F |
| Dec 18 | 44.8°F | 45.1°F |
| Dec 19 | 43.5°F | 43.9°F |
| Dec 20 | 43.2°F | 43.3°F |
| Dec 21 | 42.6°F | 43°F |
| Dec 22 | 42.4°F | 42.6°F |
| Dec 23 | 41.7°F | 41.9°F |
| Dec 24 | 41.5°F | 41.9°F |
| Dec 25 | 40.8°F | 41°F |
| Dec 26 | 41.9°F | 41.9°F |
| Dec 27 | 39.9°F | 40.5°F |
| Dec 28 | 39.6°F | 39.9°F |
| Dec 29 | 39.9°F | 40.3°F |
| Dec 30 | 39.6°F | 39.9°F |
| Dec 31 | 38.5°F | 39°F |