Average Soil Temperature in Flagstaff, AZ for September 2026
Data from Williams 35 NNW (55 mi away) • 25 of 30 days reported
Monthly Summary by Depth
2" depth
72°F
avg
65.3°F – 78.3°F
25 days
4" depth
71.7°F
avg
66.6°F – 76.6°F
25 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| Sep 1 | 65.3°F | 66.6°F |
| Sep 2 | 68.4°F | 68.2°F |
| Sep 3 | 69.1°F | 68.7°F |
| Sep 4 | 70.5°F | 70.3°F |
| Sep 5 | 71.8°F | 71.1°F |
| Sep 6 | 72.9°F | 72.5°F |
| Sep 7 | 73.2°F | 72.5°F |
| Sep 8 | 74.8°F | 73.8°F |
| Sep 9 | 76.8°F | 75.2°F |
| Sep 10 | 78.3°F | 76.5°F |
| Sep 11 | 78.3°F | 76.6°F |
| Sep 12 | 76.3°F | 75.4°F |
| Sep 13 | 73°F | 73.6°F |
| Sep 14 | 73.6°F | 72.7°F |
| Sep 15 | 73.9°F | 73.8°F |
| Sep 16 | 72.7°F | 72.9°F |
| Sep 17 | 72.5°F | 72°F |
| Sep 18 | 72.1°F | 72.1°F |
| Sep 19 | 70.9°F | 71.2°F |
| Sep 20 | 70.2°F | 70.3°F |
| Sep 21 | 72.1°F | 71.4°F |
| Sep 22 | 70.9°F | 71.1°F |
| Sep 23 | 70.2°F | 70°F |
| Sep 24 | 65.5°F | 67.8°F |
| Sep 25 | 67.5°F | 67.1°F |