Average Soil Temperature in Rapid City, SD for May 2026
Data from Sundance 8 NNW (66.4 mi away) • 28 of 31 days reported
Monthly Summary by Depth
2" depth
49.3°F
avg
43.7°F – 56.1°F
28 days
4" depth
47.7°F
avg
41.9°F – 54.3°F
28 days
8" depth
46.5°F
avg
41°F – 52.2°F
28 days
20" depth
44.2°F
avg
40.3°F – 48°F
28 days
40" depth
43.4°F
avg
40.8°F – 46°F
28 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| May 1 | 43.9°F | 41.9°F | 41°F | 40.3°F | 40.8°F |
| May 2 | 45.9°F | 44.1°F | 42.4°F | 40.6°F | 40.8°F |
| May 3 | 47.1°F | 45.7°F | 43.9°F | 41.4°F | 41°F |
| May 4 | 45.7°F | 44.8°F | 44.1°F | 41.9°F | 41.4°F |
| May 5 | 44.4°F | 43.3°F | 43.2°F | 42.1°F | 41.5°F |
| May 6 | 43.7°F | 42.1°F | 42.3°F | 41.9°F | 41.7°F |
| May 7 | 43.9°F | 43°F | 42.6°F | 41.7°F | 41.7°F |
| May 8 | 46°F | 44.8°F | 43.2°F | 41.7°F | 41.7°F |
| May 9 | 47.7°F | 46°F | 44.6°F | 42.3°F | 41.9°F |
| May 10 | 48.4°F | 46.8°F | 45.1°F | 42.6°F | 42.1°F |
| May 11 | 50.5°F | 48.9°F | 46.6°F | 43.3°F | 42.3°F |
| May 12 | 51.4°F | 49.6°F | 47.5°F | 44.1°F | 42.6°F |
| May 13 | 52.9°F | 50.9°F | 48.4°F | 44.6°F | 43°F |
| May 14 | 54.1°F | 52.3°F | 49.6°F | 45.3°F | 43.3°F |
| May 15 | 52.5°F | 50.4°F | 49.3°F | 46°F | 43.9°F |
| May 16 | 52.2°F | 50°F | 48.9°F | 46°F | 44.2°F |
| May 17 | 49.8°F | 48.9°F | 48.6°F | 46.2°F | 44.6°F |
| May 18 | 45°F | 44.8°F | 46.4°F | 45.9°F | 45°F |
| May 19 | 46.4°F | 45°F | 45.1°F | 45°F | 44.8°F |
| May 20 | 48.7°F | 46.8°F | 46°F | 44.8°F | 44.8°F |
| May 21 | 48.7°F | 47.5°F | 46.9°F | 45°F | 44.6°F |
| May 22 | 48.4°F | 47.1°F | 46.6°F | 45.1°F | 44.8°F |
| May 23 | 50°F | 48.2°F | 46.9°F | 45.1°F | 44.8°F |
| May 24 | 52.5°F | 50.7°F | 48.6°F | 45.7°F | 44.8°F |
| May 25 | 53.8°F | 51.6°F | 49.6°F | 46.2°F | 45°F |
| May 26 | 55°F | 53.2°F | 50.7°F | 46.9°F | 45.3°F |
| May 27 | 56.1°F | 54.3°F | 51.6°F | 47.5°F | 45.7°F |
| May 28 | 55.6°F | 54.1°F | 52.2°F | 48°F | 46°F |