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Historical Weather for Diamond Bar, California |
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| Weather Station Latitude: 33°43'N Longitude: 117°46'W |
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| Elevation: 35 Meters |
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| Estimate distance to Diamond Bar, CA: 20.7 miles |
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| Average Temperature |
Years on record: 80 |
| 12.0 | 12.8 | 13.9 | 15.7 | 17.6 | 19.7 | 22.0 | 22.4 | 21.5 | 18.6 | 15.2 | 12.5 |
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| Average High Temperature |
Years on record: 86 |
| 19.3 | 19.8 | 20.9 | 22.6 | 24.0 | 26.2 | 28.9 | 29.5 | 29.2 | 26.3 | 23.4 | 20.1 |
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| Average Low Temperature |
Years on record: 80 |
| 4.7 | 5.8 | 6.8 | 8.8 | 11.1 | 13.1 | 15.0 | 15.2 | 13.7 | 10.8 | 6.9 | 4.9 |
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| Average Precipitation |
Years on record: 94 |
| 7.1 | 6.8 | 5.9 | 2.7 | 0.9 | 0.1 | 0.0 | 0.1 | 0.4 | 1.1 | 3.2 | 5.8 |
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