Average Soil Temperature in Issaquah, WA for August 2026
Data from Darrington 21 NNE (76.6 mi away) • 25 of 31 days reported
Monthly Summary by Depth
2" depth
64.7°F
avg
62.4°F – 66.2°F
25 days
4" depth
64.9°F
avg
62.8°F – 66.4°F
25 days
8" depth
64°F
avg
63.1°F – 64.8°F
25 days
20" depth
63.1°F
avg
62.4°F – 63.9°F
25 days
40" depth
62.2°F
avg
61.7°F – 62.8°F
25 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Aug 1 | 64.9°F | 65.5°F | 64.6°F | 63.7°F | 62.8°F |
| Aug 2 | 63.3°F | 63.9°F | 64°F | 63.3°F | 62.4°F |
| Aug 3 | 62.4°F | 62.8°F | 63.3°F | 62.6°F | 61.9°F |
| Aug 4 | 63.1°F | 63.3°F | 63.1°F | 62.4°F | 61.7°F |
| Aug 5 | 63.7°F | 64°F | 63.3°F | 62.4°F | 61.7°F |
| Aug 6 | 64.6°F | 64.8°F | 63.5°F | 62.6°F | 61.7°F |
| Aug 7 | 65.7°F | 65.8°F | 63.9°F | 63°F | 61.9°F |
| Aug 8 | 65.3°F | 65.7°F | 64°F | 63.1°F | 62.1°F |
| Aug 9 | 64.2°F | 64.8°F | 63.7°F | 63.1°F | 62.1°F |
| Aug 10 | 63.9°F | 64.4°F | 63.5°F | 63°F | 62.1°F |
| Aug 11 | 64°F | 64.6°F | 63.5°F | 62.8°F | 61.9°F |
| Aug 12 | 64.2°F | 64.6°F | 63.5°F | 62.8°F | 61.9°F |
| Aug 13 | 64.9°F | 65.1°F | 63.7°F | 62.8°F | 61.9°F |
| Aug 14 | 65.8°F | 66°F | 64°F | 63.1°F | 62.1°F |
| Aug 15 | 64.9°F | 65.1°F | 64°F | 63.3°F | 62.2°F |
| Aug 16 | 65.5°F | 65.5°F | 64.2°F | 63.3°F | 62.2°F |
| Aug 17 | 65.1°F | 65.3°F | 64.2°F | 63.3°F | 62.2°F |
| Aug 18 | 66.2°F | 66.4°F | 64.4°F | 63.5°F | 62.2°F |
| Aug 19 | 66°F | 66.2°F | 64.6°F | 63.7°F | 62.6°F |
| Aug 20 | 65.8°F | 66°F | 64.6°F | 63.7°F | 62.6°F |
| Aug 21 | 65.8°F | 66°F | 64.6°F | 63.7°F | 62.8°F |
| Aug 22 | 64.8°F | 64.9°F | 64.8°F | 63.9°F | 62.8°F |
| Aug 23 | 63.7°F | 64°F | 64.2°F | 63.3°F | 62.6°F |
| Aug 24 | 63.7°F | 63.9°F | 63.7°F | 62.8°F | 62.1°F |
| Aug 25 | 65.1°F | 64.9°F | 64°F | 63°F | 62.1°F |