Average Soil Temperature in Harlan, IA — March 2026
Data from Shagbark Hills (59.4 mi away) • 28 of 31 days reported
Monthly Summary by Depth
2" depth
37.6°F
avg
31.3°F – 47.7°F
28 days
4" depth
39.4°F
avg
31.6°F – 50°F
28 days
8" depth
39°F
avg
32.5°F – 48.4°F
28 days
20" depth
38.5°F
avg
33.8°F – 45.9°F
28 days
40" depth
39.5°F
avg
37.8°F – 43.5°F
28 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Mar 1 | 31.3°F | 31.6°F | 32.5°F | 33.8°F | 37.8°F |
| Mar 2 | 31.5°F | 31.6°F | 32.5°F | 34°F | 37.8°F |
| Mar 3 | 31.5°F | 31.6°F | 32.5°F | 34°F | 37.8°F |
| Mar 4 | 31.5°F | 31.6°F | 32.5°F | 34°F | 37.8°F |
| Mar 5 | 31.6°F | 32.2°F | 32.5°F | 34°F | 37.8°F |
| Mar 6 | 31.6°F | 32.7°F | 32.7°F | 34.2°F | 37.8°F |
| Mar 7 | 31.6°F | 33.6°F | 32.7°F | 34.7°F | 37.8°F |
| Mar 8 | 32.9°F | 36.7°F | 34°F | 35.1°F | 37.8°F |
| Mar 9 | 35.6°F | 40.1°F | 37.4°F | 36.1°F | 37.9°F |
| Mar 10 | 35.6°F | 38.8°F | 38.3°F | 37.2°F | 38.1°F |
| Mar 11 | 35.6°F | 37.6°F | 38.3°F | 37.8°F | 38.5°F |
| Mar 12 | 37°F | 38.7°F | 38.1°F | 37.9°F | 38.7°F |
| Mar 13 | 36.9°F | 38.3°F | 38.7°F | 38.1°F | 39°F |
| Mar 14 | 39.4°F | 41°F | 40.1°F | 38.5°F | 39.2°F |
| Mar 15 | 35.4°F | 36.1°F | 38.5°F | 39.2°F | 39.6°F |
| Mar 16 | 33.1°F | 33.8°F | 36.1°F | 38.5°F | 39.7°F |
| Mar 17 | 32.5°F | 33.1°F | 35.1°F | 37.8°F | 39.9°F |
| Mar 18 | 32.5°F | 34.9°F | 34.9°F | 37.2°F | 39.7°F |
| Mar 19 | 38.3°F | 41.4°F | 38.5°F | 37.4°F | 39.7°F |
| Mar 20 | 43.2°F | 45.9°F | 42.8°F | 38.8°F | 39.7°F |
| Mar 21 | 47.3°F | 49.8°F | 46.4°F | 41°F | 39.9°F |
| Mar 22 | 43.3°F | 44.6°F | 45.5°F | 42.6°F | 40.3°F |
| Mar 24 | 42.8°F | 44.2°F | 44.1°F | 42.6°F | 41.4°F |
| Mar 25 | 46.8°F | 48.9°F | 46.4°F | 43°F | 41.7°F |
| Mar 26 | 45.3°F | 46.9°F | 47.5°F | 44.4°F | 42.1°F |
| Mar 29 | 45.5°F | 48°F | 46.4°F | 44.2°F | 43°F |
| Mar 30 | 47.7°F | 50°F | 48.4°F | 45°F | 43.3°F |
| Mar 31 | 46.6°F | 48.6°F | 48.4°F | 45.9°F | 43.5°F |