Average Soil Temperature in Sioux Falls, SD for May 2026
Data from Sioux Falls 14 NNE (13.2 mi away) • 28 of 31 days reported
Monthly Summary by Depth
2" depth
59.4°F
avg
50.9°F – 70.9°F
28 days
4" depth
58°F
avg
50.9°F – 68.5°F
28 days
8" depth
55.1°F
avg
49.5°F – 64.4°F
28 days
20" depth
54°F
avg
49.1°F – 61.9°F
28 days
40" depth
51.8°F
avg
48.2°F – 57.2°F
28 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| May 1 | 51.3°F | 50.9°F | 49.5°F | 49.1°F | 48.2°F |
| May 2 | 52.2°F | 51.4°F | 49.5°F | 49.1°F | 48.2°F |
| May 3 | 56.3°F | 54.5°F | 51.1°F | 50°F | 48.4°F |
| May 4 | 55.4°F | 54.7°F | 51.8°F | 50.9°F | 48.9°F |
| May 5 | 52.2°F | 52.3°F | 50.7°F | 50.4°F | 49.1°F |
| May 6 | 50.9°F | 50.9°F | 49.5°F | 49.6°F | 49.1°F |
| May 7 | 54.3°F | 52.9°F | 50.2°F | 49.6°F | 48.9°F |
| May 8 | 56.5°F | 55°F | 51.6°F | 50.5°F | 49.1°F |
| May 9 | 57.7°F | 56.5°F | 52.7°F | 51.4°F | 49.5°F |
| May 10 | 57.4°F | 56.3°F | 52.9°F | 52°F | 50°F |
| May 11 | 57.6°F | 56.3°F | 53.1°F | 52.2°F | 50.4°F |
| May 12 | 61.2°F | 59.2°F | 54.7°F | 53.1°F | 50.7°F |
| May 13 | 61.5°F | 59.7°F | 55.4°F | 54°F | 51.3°F |
| May 14 | 59.7°F | 58.8°F | 55.9°F | 54.7°F | 51.8°F |
| May 15 | 62.2°F | 59.9°F | 56.1°F | 54.7°F | 52.2°F |
| May 16 | 63.9°F | 61.7°F | 57.7°F | 55.9°F | 52.7°F |
| May 17 | 63.3°F | 61.9°F | 58.5°F | 56.8°F | 53.4°F |
| May 18 | 58.6°F | 59°F | 57.7°F | 56.8°F | 54°F |
| May 19 | 55.2°F | 55.9°F | 55.4°F | 55.2°F | 54°F |
| May 20 | 56.5°F | 55.8°F | 54.5°F | 54.3°F | 53.4°F |
| May 21 | 59.2°F | 57.7°F | 55.6°F | 54.7°F | 53.2°F |
| May 22 | 56.8°F | 56.8°F | 55.6°F | 55°F | 53.4°F |
| May 23 | 59.9°F | 58.1°F | 55.6°F | 54.7°F | 53.2°F |
| May 24 | 63.7°F | 61.5°F | 57.9°F | 56.1°F | 53.6°F |
| May 25 | 67.5°F | 64.6°F | 60.1°F | 57.9°F | 54.3°F |
| May 26 | 69.4°F | 66.7°F | 62.2°F | 59.7°F | 55.4°F |
| May 27 | 70.5°F | 67.8°F | 63.3°F | 60.8°F | 56.3°F |
| May 28 | 70.9°F | 68.5°F | 64.4°F | 61.9°F | 57.2°F |