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San Bernardino, California Weather Summary
September,
2015
| 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: | 104.5°F (40.3°C) | at 2:57PM Sep 20 | 93.1°F (33.9°C) | 92°F (34°C) |
| Low Temperature: | 59.2°F (15.1°C) | at 6:55AM Sep 5 | 68.4°F (20.2°C) | 66°F (19°C) |
| Month Average: | 79.7°F (26.5°C) | for 30 days | ||
| Normal Average: | 78°F (26°C) | |||
| Precipitation: | 1.79" (45.4 mm) | |||
| Date | High | Low | Average | Precipitation |
| September 1 | 89.2°F(31.8°C) | 64.5°F(18.0°C) | 74.1°F(23.4°C) | 0.00"(0.0 mm) |
| September 2 | 88.2°F(31.2°C) | 65.5°F(18.6°C) | 74.0°F(23.3°C) | 0.00"(0.0 mm) |
| September 3 | 84.9°F(29.4°C) | 62.5°F(16.9°C) | 70.8°F(21.5°C) | 0.00"(0.0 mm) |
| September 4 | 82.8°F(28.2°C) | 62.7°F(17.0°C) | 70.7°F(21.5°C) | 0.00"(0.0 mm) |
| September 5 | 89.3°F(31.9°C) | 59.2°F(15.1°C) | 73.1°F(22.8°C) | 0.00"(0.0 mm) |
| September 6 | 94.4°F(34.6°C) | 63.2°F(17.3°C) | 79.3°F(26.3°C) | 0.00"(0.0 mm) |
| September 7 | 98.0°F(36.7°C) | 69.6°F(20.9°C) | 84.6°F(29.2°C) | 0.00"(0.0 mm) |
| September 8 | 103.4°F(39.7°C) | 75.4°F(24.1°C) | 88.5°F(31.4°C) | 0.00"(0.0 mm) |
| September 9 | 101.8°F(38.8°C) | 79.6°F(26.4°C) | 88.5°F(31.4°C) | 0.00"(0.0 mm) |
| September 10 | 98.3°F(36.8°C) | 77.6°F(25.3°C) | 87.1°F(30.6°C) | 0.00"(0.0 mm) |
| September 11 | 100.0°F(37.8°C) | 76.8°F(24.9°C) | 86.7°F(30.4°C) | 0.00"(0.0 mm) |
| September 12 | 90.9°F(32.7°C) | 73.7°F(23.2°C) | 82.6°F(28.1°C) | 0.00"(0.0 mm) |
| September 13 | 94.0°F(34.5°C) | 73.1°F(22.8°C) | 82.4°F(28.0°C) | 0.00"(0.0 mm) |
| September 14 | 84.6°F(29.2°C) | 68.4°F(20.2°C) | 76.0°F(24.5°C) | 0.00"(0.0 mm) |
| September 15 | 78.8°F(26.0°C) | 66.8°F(19.3°C) | 72.0°F(22.2°C) | 1.79"(45.4 mm) |
| September 16 | 79.7°F(26.5°C) | 64.9°F(18.3°C) | 71.1°F(21.7°C) | 0.00"(0.0 mm) |
| September 17 | 82.9°F(28.3°C) | 62.7°F(17.0°C) | 72.0°F(22.2°C) | 0.00"(0.0 mm) |
| September 18 | 96.0°F(35.5°C) | 61.4°F(16.3°C) | 77.7°F(25.4°C) | 0.00"(0.0 mm) |
| September 19 | 98.9°F(37.2°C) | 65.4°F(18.6°C) | 82.7°F(28.1°C) | 0.00"(0.0 mm) |
| September 20 | 104.5°F(40.3°C) | 68.5°F(20.3°C) | 86.5°F(30.3°C) | 0.00"(0.0 mm) |
| September 21 | 94.2°F(34.5°C) | 72.6°F(22.6°C) | 81.2°F(27.4°C) | 0.00"(0.0 mm) |
| September 22 | 87.8°F(31.0°C) | 71.0°F(21.6°C) | 77.4°F(25.2°C) | 0.00"(0.0 mm) |
| September 23 | 94.6°F(34.8°C) | 67.7°F(19.9°C) | 79.4°F(26.4°C) | 0.00"(0.0 mm) |
| September 24 | 99.6°F(37.5°C) | 69.4°F(20.8°C) | 83.8°F(28.8°C) | 0.00"(0.0 mm) |
| September 25 | 99.0°F(37.2°C) | 71.2°F(21.8°C) | 84.8°F(29.4°C) | 0.00"(0.0 mm) |
| September 26 | 98.9°F(37.2°C) | 71.9°F(22.1°C) | 84.8°F(29.4°C) | 0.00"(0.0 mm) |
| September 27 | 96.7°F(35.9°C) | 69.5°F(20.9°C) | 82.6°F(28.1°C) | 0.00"(0.0 mm) |
| September 28 | 93.2°F(34.0°C) | 67.9°F(19.9°C) | 80.2°F(26.8°C) | 0.00"(0.0 mm) |
| September 29 | 91.9°F(33.3°C) | 64.6°F(18.1°C) | 78.0°F(25.5°C) | 0.00"(0.0 mm) |
| September 30 | 95.7°F(35.4°C) | 63.6°F(17.6°C) | 79.7°F(26.5°C) | 0.00"(0.0 mm) |