Average Soil Temperature in Thornton, CO for May 2026
Data from Boulder 14 W (32.4 mi away) • 28 of 31 days reported
Monthly Summary by Depth
2" depth
42.4°F
avg
33.3°F – 52.2°F
28 days
4" depth
42.2°F
avg
34.3°F – 50.4°F
28 days
Daily Readings
| Date | 2" | 4" |
|---|---|---|
| May 1 | 36.9°F | 37.6°F |
| May 2 | 42.8°F | 41°F |
| May 3 | 41.4°F | 41°F |
| May 4 | 39.7°F | 39.9°F |
| May 5 | 37.4°F | 38.3°F |
| May 6 | 35.6°F | 36.7°F |
| May 7 | 34.3°F | 35.6°F |
| May 8 | 33.3°F | 34.3°F |
| May 9 | 36.7°F | 37°F |
| May 10 | 44.8°F | 43°F |
| May 11 | 46.8°F | 44.8°F |
| May 12 | 48.9°F | 46.9°F |
| May 13 | 50.2°F | 48.4°F |
| May 14 | 51.3°F | 49.5°F |
| May 15 | 52.2°F | 50.4°F |
| May 16 | 50.7°F | 49.5°F |
| May 17 | 47.3°F | 47.1°F |
| May 18 | 40.1°F | 41.5°F |
| May 19 | 37.8°F | 39.2°F |
| May 20 | 35.8°F | 37°F |
| May 21 | 34.9°F | 36.1°F |
| May 22 | 35.6°F | 37.8°F |
| May 23 | 40.1°F | 41°F |
| May 24 | 45.9°F | 44.6°F |
| May 25 | 47.1°F | 46°F |
| May 26 | 46.6°F | 46°F |
| May 27 | 45°F | 44.6°F |
| May 28 | 48.7°F | 47.5°F |