Average Soil Temperature in Flagstaff, AZ — December 2025
Data from Williams 35 NNW (55 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
39.4°F
avg
33.3°F – 46.2°F
31 days
4" depth
40.4°F
avg
35.4°F – 46.4°F
31 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| Dec 1 | 36.3°F | 38.8°F |
| Dec 2 | 35.8°F | 37.8°F |
| Dec 3 | 36.9°F | 38.3°F |
| Dec 4 | 34.2°F | 36.5°F |
| Dec 5 | 34.5°F | 36.5°F |
| Dec 6 | 36.7°F | 37.6°F |
| Dec 7 | 36.9°F | 38.1°F |
| Dec 8 | 36.9°F | 38.1°F |
| Dec 9 | 37.4°F | 38.5°F |
| Dec 10 | 39.6°F | 39.9°F |
| Dec 11 | 41.5°F | 41.7°F |
| Dec 12 | 41.5°F | 42.1°F |
| Dec 13 | 40.8°F | 41.7°F |
| Dec 14 | 41°F | 41.5°F |
| Dec 15 | 40.6°F | 41.5°F |
| Dec 16 | 39.6°F | 40.6°F |
| Dec 17 | 41.4°F | 41.7°F |
| Dec 18 | 40.8°F | 41.7°F |
| Dec 19 | 41.4°F | 41.7°F |
| Dec 20 | 43°F | 43.3°F |
| Dec 21 | 42.4°F | 43°F |
| Dec 22 | 42.3°F | 43°F |
| Dec 23 | 43.5°F | 43.3°F |
| Dec 24 | 46°F | 45.7°F |
| Dec 25 | 46.2°F | 46.4°F |
| Dec 26 | 44.1°F | 44.8°F |
| Dec 27 | 40.6°F | 42.4°F |
| Dec 28 | 36°F | 38.7°F |
| Dec 29 | 33.3°F | 36.1°F |
| Dec 30 | 33.3°F | 35.4°F |
| Dec 31 | 35.6°F | 36.3°F |