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San Bernardino, California Weather Summary
September,
2011
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 |
| Extremes | Average | Normal | ||
| High Temperature: | 103.5°F (39.7°C) | at 3:00PM Sep 7 | 91.3°F (32.9°C) | 92°F (34°C) |
| Low Temperature: | 58.3°F (14.6°C) | at 7:10AM Sep 18 | 63.7°F (17.6°C) | 66°F (19°C) |
| Month Average: | 75.7°F (24.3°C) | for 30 days | ||
| Normal Average: | 78°F (26°C) | |||
| Precipitation: | 0.01" (0.2 mm) | |||
| Date | High | Low | Average | Precipitation |
| September 1 | 95.0°F(35.0°C) | 61.6°F(16.4°C) | 76.9°F(24.9°C) | 0.00"(0.0 mm) |
| September 2 | 95.6°F(35.3°C) | 63.5°F(17.5°C) | 78.9°F(26.0°C) | 0.00"(0.0 mm) |
| September 3 | 96.0°F(35.6°C) | 63.6°F(17.6°C) | 79.1°F(26.1°C) | 0.00"(0.0 mm) |
| September 4 | 91.5°F(33.1°C) | 65.9°F(18.8°C) | 78.6°F(25.9°C) | 0.00"(0.0 mm) |
| September 5 | 93.6°F(34.2°C) | 70.5°F(21.4°C) | 80.3°F(26.8°C) | 0.01"(0.2 mm) |
| September 6 | 101.6°F(38.7°C) | 69.6°F(20.9°C) | 86.1°F(30.1°C) | 0.00"(0.0 mm) |
| September 7 | 103.5°F(39.7°C) | 74.4°F(23.5°C) | 88.7°F(31.5°C) | 0.00"(0.0 mm) |
| September 8 | 99.1°F(37.3°C) | 74.4°F(23.5°C) | 86.2°F(30.1°C) | 0.00"(0.0 mm) |
| September 9 | 92.1°F(33.4°C) | 67.0°F(19.4°C) | 78.2°F(25.7°C) | 0.00"(0.0 mm) |
| September 10 | 77.8°F(25.5°C) | 61.2°F(16.2°C) | 68.2°F(20.1°C) | 0.00"(0.0 mm) |
| September 11 | 84.5°F(29.1°C) | 61.5°F(16.4°C) | 70.4°F(21.3°C) | 0.00"(0.0 mm) |
| September 12 | 94.8°F(34.9°C) | 59.6°F(15.3°C) | 75.9°F(24.4°C) | 0.00"(0.0 mm) |
| September 13 | 92.1°F(33.4°C) | 66.4°F(19.1°C) | 77.2°F(25.1°C) | 0.00"(0.0 mm) |
| September 14 | 85.4°F(29.6°C) | 64.1°F(17.8°C) | 74.0°F(23.4°C) | 0.00"(0.0 mm) |
| September 15 | 87.0°F(30.5°C) | 61.6°F(16.5°C) | 71.9°F(22.2°C) | 0.00"(0.0 mm) |
| September 16 | 78.5°F(25.9°C) | 62.0°F(16.7°C) | 67.7°F(19.8°C) | 0.00"(0.0 mm) |
| September 17 | 81.6°F(27.6°C) | 62.1°F(16.7°C) | 68.4°F(20.2°C) | 0.00"(0.0 mm) |
| September 18 | 96.3°F(35.7°C) | 58.3°F(14.6°C) | 75.1°F(24.0°C) | 0.00"(0.0 mm) |
| September 19 | 98.1°F(36.7°C) | 64.3°F(18.0°C) | 79.5°F(26.4°C) | 0.00"(0.0 mm) |
| September 20 | 92.8°F(33.8°C) | 63.2°F(17.4°C) | 76.0°F(24.5°C) | 0.00"(0.0 mm) |
| September 21 | 94.0°F(34.4°C) | 60.8°F(16.0°C) | 75.0°F(23.9°C) | 0.00"(0.0 mm) |
| September 22 | 100.4°F(38.0°C) | 62.0°F(16.7°C) | 78.7°F(25.9°C) | 0.00"(0.0 mm) |
| September 23 | 95.3°F(35.1°C) | 64.9°F(18.3°C) | 77.2°F(25.1°C) | 0.00"(0.0 mm) |
| September 24 | 81.8°F(27.7°C) | 61.6°F(16.5°C) | 69.4°F(20.8°C) | 0.00"(0.0 mm) |
| September 25 | 76.2°F(24.6°C) | 60.9°F(16.1°C) | 65.5°F(18.6°C) | 0.00"(0.0 mm) |
| September 26 | 81.6°F(27.6°C) | 59.0°F(15.0°C) | 67.9°F(20.0°C) | 0.00"(0.0 mm) |
| September 27 | 100.1°F(37.8°C) | 60.7°F(16.0°C) | 77.8°F(25.5°C) | 0.00"(0.0 mm) |
| September 28 | 88.9°F(31.6°C) | 63.5°F(17.5°C) | 73.8°F(23.2°C) | 0.00"(0.0 mm) |
| September 29 | 91.0°F(32.8°C) | 61.7°F(16.5°C) | 74.4°F(23.6°C) | 0.00"(0.0 mm) |
| September 30 | 91.8°F(33.2°C) | 61.8°F(16.6°C) | 75.3°F(24.1°C) | 0.00"(0.0 mm) |