Average Soil Temperature in Castaic, CA for May 2026
Data from Stubblefield (58.9 mi away) • 31 of 31 days reported
Monthly Summary by Depth
2" depth
67.9°F
avg
56.7°F – 75.6°F
31 days
4" depth
71.9°F
avg
61.7°F – 78.6°F
31 days
8" depth
72.9°F
avg
64.2°F – 78.8°F
31 days
20" depth
68.5°F
avg
64°F – 72.7°F
31 days
40" depth
64.8°F
avg
62.1°F – 67.5°F
31 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| May 1 | 67.1°F | 69.3°F | 69.1°F | 64°F | 62.1°F |
| May 2 | 67.8°F | 70.7°F | 70.5°F | 64.9°F | 62.2°F |
| May 3 | 66.4°F | 69.3°F | 69.8°F | 65.7°F | 62.6°F |
| May 4 | 63.1°F | 66.6°F | 67.8°F | 65.7°F | 62.6°F |
| May 5 | 56.7°F | 61.7°F | 64.2°F | 64.9°F | 63°F |
| May 6 | 61.2°F | 65.3°F | 66.7°F | 64.2°F | 63.1°F |
| May 7 | 65.5°F | 68.7°F | 68.9°F | 64.8°F | 63°F |
| May 8 | 65.1°F | 69.6°F | 70.7°F | 65.7°F | 63.1°F |
| May 9 | 66.4°F | 70.2°F | 71.2°F | 66.2°F | 63.1°F |
| May 10 | 70°F | 72.7°F | 72.7°F | 66.7°F | 63.1°F |
| May 11 | 71.1°F | 74.3°F | 74.1°F | 67.8°F | 63.5°F |
| May 12 | 71.8°F | 75.2°F | 75.2°F | 68.7°F | 63.9°F |
| May 13 | 68.5°F | 73°F | 74.7°F | 69.1°F | 64.2°F |
| May 14 | 69.3°F | 72.9°F | 74.1°F | 69.1°F | 64.4°F |
| May 15 | 70.7°F | 74.3°F | 75°F | 69.4°F | 64.8°F |
| May 16 | 68.5°F | 73.2°F | 74.8°F | 69.6°F | 64.8°F |
| May 17 | 67.8°F | 72.7°F | 74.3°F | 69.6°F | 65.1°F |
| May 18 | 67.5°F | 72°F | 73.9°F | 69.6°F | 65.5°F |
| May 19 | 70°F | 73.6°F | 74.5°F | 69.6°F | 65.8°F |
| May 20 | 72.3°F | 75.2°F | 75.6°F | 70°F | 66°F |
| May 21 | 74.3°F | 77°F | 77°F | 70.5°F | 65.8°F |
| May 22 | 75°F | 77.9°F | 77.9°F | 71.2°F | 65.8°F |
| May 23 | 75.6°F | 78.6°F | 78.6°F | 71.8°F | 66°F |
| May 24 | 74.7°F | 78.4°F | 78.8°F | 72.3°F | 66.4°F |
| May 25 | 73.9°F | 78.1°F | 78.8°F | 72.7°F | 66.7°F |
| May 26 | 66.4°F | 72°F | 74.1°F | 72.3°F | 67.1°F |
| May 27 | 63.9°F | 70.2°F | 72.9°F | 71.2°F | 67.1°F |
| May 28 | 59.7°F | 65.1°F | 68°F | 70°F | 67.1°F |
| May 29 | 63.5°F | 68.4°F | 70°F | 68.7°F | 67.1°F |
| May 30 | 64.8°F | 70.3°F | 71.8°F | 68.7°F | 67.5°F |
| May 31 | 67.8°F | 72.5°F | 73.2°F | 68.9°F | 67.1°F |