Average Soil Temperature in Spearfish, SD for September 2021
Data from Sundance 8 NNW (28.4 mi away) • 30 of 30 days reported
Monthly Summary by Depth
2" depth
58.6°F
avg
51.3°F – 64.8°F
30 days
4" depth
58.1°F
avg
51.8°F – 62.8°F
30 days
8" depth
58.2°F
avg
53.1°F – 61.9°F
30 days
20" depth
57.3°F
avg
54.5°F – 59.4°F
30 days
40" depth
57°F
avg
55.2°F – 58.3°F
30 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Sep 1 | 63.5°F | 62.6°F | 61.9°F | 59.4°F | 58.3°F |
| Sep 2 | 64°F | 62.6°F | 61.9°F | 59.4°F | 58.3°F |
| Sep 3 | 60.6°F | 60.8°F | 61.2°F | 59.4°F | 58.3°F |
| Sep 4 | 59.5°F | 59.2°F | 59.5°F | 59°F | 58.3°F |
| Sep 5 | 60.3°F | 59.4°F | 59.5°F | 58.5°F | 58.1°F |
| Sep 6 | 61.5°F | 60.3°F | 59.9°F | 58.5°F | 57.9°F |
| Sep 7 | 61°F | 59.9°F | 59.9°F | 58.3°F | 57.7°F |
| Sep 8 | 61.3°F | 60.1°F | 59.7°F | 58.3°F | 57.7°F |
| Sep 9 | 62.2°F | 60.8°F | 60.3°F | 58.3°F | 57.6°F |
| Sep 10 | 63.1°F | 61.5°F | 60.4°F | 58.3°F | 57.6°F |
| Sep 11 | 64.8°F | 62.8°F | 61.5°F | 58.5°F | 57.6°F |
| Sep 12 | 63.1°F | 62.1°F | 61.3°F | 58.6°F | 57.7°F |
| Sep 13 | 62.2°F | 61.3°F | 61°F | 58.8°F | 57.7°F |
| Sep 14 | 58.6°F | 59°F | 59.7°F | 58.6°F | 57.7°F |
| Sep 15 | 59.9°F | 59°F | 59°F | 58.1°F | 57.7°F |
| Sep 16 | 59.2°F | 58.8°F | 59°F | 57.9°F | 57.6°F |
| Sep 17 | 55.2°F | 55.9°F | 57.4°F | 57.6°F | 57.4°F |
| Sep 18 | 59.2°F | 57.9°F | 57.4°F | 57°F | 57.2°F |
| Sep 19 | 59.9°F | 59.4°F | 58.8°F | 57°F | 57°F |
| Sep 20 | 54°F | 55.4°F | 57.2°F | 57°F | 57°F |
| Sep 21 | 51.8°F | 52.5°F | 54.7°F | 56.3°F | 56.7°F |
| Sep 22 | 53.4°F | 53.2°F | 54.3°F | 55.6°F | 56.3°F |
| Sep 23 | 55.4°F | 54.7°F | 55°F | 55.2°F | 56.1°F |
| Sep 24 | 54.5°F | 54.5°F | 55.2°F | 55.2°F | 55.8°F |
| Sep 25 | 55°F | 54.5°F | 54.9°F | 55°F | 55.6°F |
| Sep 26 | 56.5°F | 55.8°F | 55.4°F | 54.9°F | 55.4°F |
| Sep 27 | 57.6°F | 56.8°F | 56.1°F | 55°F | 55.2°F |
| Sep 28 | 58.3°F | 57.6°F | 56.8°F | 55.2°F | 55.2°F |
| Sep 29 | 51.3°F | 53.4°F | 55.4°F | 55.4°F | 55.2°F |
| Sep 30 | 51.8°F | 51.8°F | 53.1°F | 54.5°F | 55.2°F |