Average Soil Temperature in Harlan, IA for May 2026
Data from Shagbark Hills (59.4 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
60.6°F
avg
52.2°F – 71.4°F
31 days
4" depth
62.4°F
avg
53.6°F – 72.7°F
31 days
8" depth
61.5°F
avg
54.3°F – 70.9°F
31 days
20" depth
57.9°F
avg
52.7°F – 65.1°F
31 days
40" depth
53.8°F
avg
50.7°F – 58.3°F
31 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| May 1 | 52.2°F | 53.6°F | 54.3°F | 52.9°F | 50.7°F |
| May 2 | 54°F | 55.9°F | 55°F | 52.7°F | 50.7°F |
| May 3 | 55.4°F | 57.7°F | 56.5°F | 53.2°F | 50.9°F |
| May 4 | 55.4°F | 57.9°F | 57.2°F | 54.1°F | 50.9°F |
| May 5 | 53.6°F | 55.9°F | 56.3°F | 54.5°F | 51.3°F |
| May 6 | 53.1°F | 55°F | 55.4°F | 54.3°F | 51.4°F |
| May 7 | 55.6°F | 57.9°F | 57°F | 54.3°F | 51.6°F |
| May 8 | 57°F | 59.7°F | 58.1°F | 54.9°F | 51.6°F |
| May 9 | 56.3°F | 58.6°F | 58.3°F | 55.4°F | 51.8°F |
| May 10 | 56.1°F | 58.6°F | 58.1°F | 55.6°F | 52.2°F |
| May 11 | 58.1°F | 60.4°F | 58.8°F | 55.8°F | 52.3°F |
| May 12 | 58.6°F | 61.7°F | 60.3°F | 56.5°F | 52.5°F |
| May 13 | 60.3°F | 63°F | 61.3°F | 57.2°F | 52.9°F |
| May 14 | 59.5°F | 61.9°F | 60.8°F | 57.7°F | 53.1°F |
| May 15 | 62.6°F | 64.8°F | 63°F | 58.3°F | 53.4°F |
| May 16 | 63°F | 64.8°F | 63.3°F | 59°F | 53.8°F |
| May 17 | 64.2°F | 65.8°F | 64.6°F | 59.5°F | 54.1°F |
| May 18 | 60.8°F | 61.3°F | 62.2°F | 59.9°F | 54.5°F |
| May 19 | 57.6°F | 57.7°F | 59.7°F | 59.2°F | 54.9°F |
| May 20 | 57.6°F | 58.1°F | 58.8°F | 57.9°F | 55°F |
| May 21 | 59.9°F | 61°F | 60.3°F | 57.7°F | 55°F |
| May 22 | 59.4°F | 60.1°F | 59.9°F | 57.9°F | 55°F |
| May 23 | 61.7°F | 63.1°F | 61.7°F | 57.9°F | 55°F |
| May 24 | 63.7°F | 64.9°F | 63.3°F | 58.8°F | 55°F |
| May 25 | 65.8°F | 67.6°F | 65.3°F | 59.7°F | 55.4°F |
| May 26 | 68.2°F | 70.5°F | 67.8°F | 61°F | 55.6°F |
| May 27 | 69.6°F | 72°F | 69.3°F | 62.4°F | 56.1°F |
| May 28 | 69.8°F | 72°F | 70°F | 63.7°F | 56.5°F |
| May 29 | 69.1°F | 70.3°F | 69.4°F | 64.4°F | 57.2°F |
| May 30 | 69.4°F | 70.5°F | 69.4°F | 64.8°F | 57.7°F |
| May 31 | 71.4°F | 72.7°F | 70.9°F | 65.1°F | 58.3°F |