Average Soil Temperature in Issaquah, WA — September 2024
Data from Darrington 21 NNE (76.6 mi away) • 30 of 30 days reported
Monthly Summary by Depth
2" depth
60.1°F
avg
52.2°F – 63.7°F
30 days
4" depth
60.2°F
avg
53.2°F – 63.3°F
30 days
8" depth
61°F
avg
56.1°F – 63.1°F
30 days
20" depth
60.3°F
avg
56.3°F – 62.2°F
30 days
40" depth
60°F
avg
56.7°F – 61.5°F
30 days
Daily Readings
| Date | 2" | 4" | 8" | 20" | 40" |
|---|---|---|---|---|---|
| Sep 1 | 62.8°F | 62.6°F | 62.2°F | 61.2°F | 60.4°F |
| Sep 2 | 62.8°F | 62.8°F | 62.6°F | 61.5°F | 61°F |
| Sep 3 | 63.7°F | 63.3°F | 63°F | 61.9°F | 61.2°F |
| Sep 4 | 62.1°F | 62.1°F | 62.6°F | 61.7°F | 61.3°F |
| Sep 5 | 62.6°F | 62.4°F | 62.6°F | 61.7°F | 61.2°F |
| Sep 6 | 62.8°F | 62.8°F | 62.8°F | 61.7°F | 61.2°F |
| Sep 7 | 62.8°F | 62.8°F | 62.8°F | 61.9°F | 61.3°F |
| Sep 8 | 63°F | 63°F | 63°F | 62.1°F | 61.5°F |
| Sep 9 | 63.1°F | 63°F | 63.1°F | 62.2°F | 61.5°F |
| Sep 10 | 62.6°F | 62.6°F | 63°F | 62.1°F | 61.5°F |
| Sep 11 | 61.9°F | 62.1°F | 62.6°F | 61.9°F | 61.5°F |
| Sep 12 | 61.7°F | 61.9°F | 62.4°F | 61.5°F | 61.2°F |
| Sep 13 | 61.7°F | 61.7°F | 62.2°F | 61.3°F | 61.2°F |
| Sep 14 | 61.5°F | 61.7°F | 62.2°F | 61.3°F | 61°F |
| Sep 15 | 60.8°F | 61°F | 61.9°F | 61.2°F | 60.8°F |
| Sep 16 | 59.4°F | 59.9°F | 61.2°F | 60.6°F | 60.6°F |
| Sep 17 | 59.5°F | 59.7°F | 60.8°F | 60.3°F | 60.1°F |
| Sep 18 | 59.5°F | 59.7°F | 60.8°F | 60.1°F | 59.9°F |
| Sep 19 | 59.5°F | 59.7°F | 60.6°F | 59.9°F | 59.9°F |
| Sep 20 | 59°F | 59.4°F | 60.4°F | 59.9°F | 59.7°F |
| Sep 21 | 56.3°F | 57°F | 59.2°F | 59°F | 59.2°F |
| Sep 22 | 57.2°F | 57.4°F | 58.8°F | 58.5°F | 58.6°F |
| Sep 23 | 59.4°F | 59.2°F | 59.5°F | 58.6°F | 58.6°F |
| Sep 24 | 58.8°F | 58.8°F | 59.5°F | 58.8°F | 58.6°F |
| Sep 25 | 59.5°F | 59.5°F | 60.1°F | 59.2°F | 58.8°F |
| Sep 26 | 57.7°F | 58.1°F | 59.5°F | 59°F | 58.8°F |
| Sep 27 | 57.4°F | 57.7°F | 59°F | 58.5°F | 58.5°F |
| Sep 28 | 55°F | 55.8°F | 57.9°F | 57.7°F | 57.9°F |
| Sep 29 | 55.2°F | 55.8°F | 57.6°F | 57.2°F | 57.4°F |
| Sep 30 | 52.2°F | 53.2°F | 56.1°F | 56.3°F | 56.7°F |