Average Soil Temperature in Hillsboro, OR for September 2026
Data from Corvallis 10 SSW (76.7 mi away) • 25 of 30 days reported
Monthly Summary by Depth
2" depth
66.3°F
avg
63.1°F – 73.4°F
25 days
4" depth
66°F
avg
63°F – 72.5°F
25 days
8" depth
66.5°F
avg
63.7°F – 72.3°F
25 days
20" depth
67°F
avg
64.4°F – 71.4°F
25 days
40" depth
66.6°F
avg
64.9°F – 68.5°F
25 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Sep 1 | 73.4°F | 72.5°F | 72.3°F | 71.4°F | 68.5°F |
| Sep 2 | 69.3°F | 69.4°F | 70.7°F | 71.1°F | 68.5°F |
| Sep 3 | 66.9°F | 67.3°F | 68.9°F | 70.2°F | 68.4°F |
| Sep 4 | 67.1°F | 66.7°F | 67.8°F | 69.1°F | 68.2°F |
| Sep 5 | 68.5°F | 67.8°F | 68°F | 68.7°F | 68°F |
| Sep 6 | 66.4°F | 66.4°F | 67.5°F | 68.4°F | 67.8°F |
| Sep 7 | 67.5°F | 66.9°F | 67.1°F | 67.8°F | 67.6°F |
| Sep 8 | 68.7°F | 68°F | 67.6°F | 67.6°F | 67.3°F |
| Sep 9 | 69.3°F | 68.5°F | 68.2°F | 67.8°F | 67.1°F |
| Sep 10 | 69.3°F | 68.7°F | 68.4°F | 68°F | 66.9°F |
| Sep 11 | 67.1°F | 67.1°F | 67.8°F | 68°F | 66.9°F |
| Sep 12 | 64.8°F | 65.3°F | 66.6°F | 67.5°F | 66.7°F |
| Sep 13 | 63.7°F | 64°F | 65.3°F | 66.7°F | 66.6°F |
| Sep 14 | 64.4°F | 64.2°F | 64.9°F | 66°F | 66.4°F |
| Sep 15 | 63.7°F | 63.9°F | 64.8°F | 65.8°F | 66.2°F |
| Sep 16 | 65.5°F | 64.9°F | 64.9°F | 65.5°F | 66°F |
| Sep 17 | 66.7°F | 66°F | 65.7°F | 65.5°F | 65.8°F |
| Sep 18 | 64.9°F | 64.8°F | 65.5°F | 65.8°F | 65.7°F |
| Sep 19 | 63.9°F | 63.9°F | 64.6°F | 65.5°F | 65.5°F |
| Sep 20 | 64.9°F | 64.2°F | 64.4°F | 65.1°F | 65.5°F |
| Sep 21 | 64.9°F | 64.6°F | 64.8°F | 65.1°F | 65.3°F |
| Sep 22 | 65.5°F | 64.8°F | 64.9°F | 65.1°F | 65.1°F |
| Sep 23 | 63.3°F | 63.3°F | 64.2°F | 64.9°F | 65.1°F |
| Sep 24 | 63.1°F | 63°F | 63.7°F | 64.6°F | 64.9°F |
| Sep 25 | 64°F | 63.7°F | 63.9°F | 64.4°F | 64.9°F |