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San Bernardino, California Weather Summary
December,
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 | 31 |
| Extremes | Average | Normal | ||
| High Temperature: | 85.6°F (29.8°C) | at 1:58PM Dec 31 | 66.4°F (19.1°C) | 66°F (19°C) |
| Low Temperature: | 35.3°F (1.8°C) | at 5:35AM Dec 6 | 42.2°F (5.6°C) | 44°F (7°C) |
| Month Average: | 53.8°F (12.1°C) | for 31 days | ||
| Normal Average: | 55°F (13°C) | |||
| Precipitation: | 0.61" (15.4 mm) | |||
| Date | High | Low | Average | Precipitation |
| December 1 | 61.1°F(16.2°C) | 52.6°F(11.5°C) | 56.1°F(13.4°C) | 0.00"(0.0 mm) |
| December 2 | 62.8°F(17.1°C) | 45.7°F(7.6°C) | 55.6°F(13.1°C) | 0.00"(0.0 mm) |
| December 3 | 58.3°F(14.6°C) | 40.0°F(4.5°C) | 50.9°F(10.5°C) | 0.00"(0.0 mm) |
| December 4 | 61.6°F(16.4°C) | 36.6°F(2.5°C) | 48.9°F(9.4°C) | 0.00"(0.0 mm) |
| December 5 | 59.5°F(15.3°C) | 38.6°F(3.7°C) | 51.7°F(11.0°C) | 0.00"(0.0 mm) |
| December 6 | 64.9°F(18.3°C) | 35.3°F(1.8°C) | 48.5°F(9.2°C) | 0.00"(0.0 mm) |
| December 7 | 70.1°F(21.1°C) | 35.6°F(2.0°C) | 51.3°F(10.7°C) | 0.00"(0.0 mm) |
| December 8 | 71.1°F(21.7°C) | 37.7°F(3.1°C) | 53.1°F(11.7°C) | 0.00"(0.0 mm) |
| December 9 | 73.1°F(22.8°C) | 41.8°F(5.5°C) | 56.4°F(13.6°C) | 0.00"(0.0 mm) |
| December 10 | 72.9°F(22.7°C) | 40.1°F(4.5°C) | 54.9°F(12.7°C) | 0.00"(0.0 mm) |
| December 11 | 60.0°F(15.5°C) | 37.0°F(2.8°C) | 49.4°F(9.7°C) | 0.00"(0.0 mm) |
| December 12 | 51.0°F(10.6°C) | 44.8°F(7.1°C) | 48.5°F(9.1°C) | 0.53"(13.4 mm) |
| December 13 | 58.8°F(14.9°C) | 41.4°F(5.2°C) | 49.1°F(9.5°C) | 0.00"(0.0 mm) |
| December 14 | 59.5°F(15.3°C) | 38.1°F(3.4°C) | 48.9°F(9.4°C) | 0.00"(0.0 mm) |
| December 15 | 56.5°F(13.6°C) | 37.3°F(3.0°C) | 46.6°F(8.1°C) | 0.03"(0.7 mm) |
| December 16 | 62.8°F(17.1°C) | 51.9°F(11.1°C) | 58.7°F(14.8°C) | 0.00"(0.0 mm) |
| December 17 | 62.7°F(17.1°C) | 49.3°F(9.6°C) | 57.4°F(14.1°C) | 0.03"(0.7 mm) |
| December 18 | 57.6°F(14.2°C) | 41.2°F(5.1°C) | 48.9°F(9.4°C) | 0.02"(0.5 mm) |
| December 19 | 58.4°F(14.7°C) | 47.0°F(8.3°C) | 51.9°F(11.1°C) | 0.00"(0.0 mm) |
| December 20 | 64.0°F(17.8°C) | 42.5°F(5.9°C) | 53.1°F(11.7°C) | 0.00"(0.0 mm) |
| December 21 | 64.0°F(17.8°C) | 37.9°F(3.3°C) | 50.5°F(10.3°C) | 0.00"(0.0 mm) |
| December 22 | 57.7°F(14.3°C) | 39.5°F(4.2°C) | 51.1°F(10.6°C) | 0.00"(0.0 mm) |
| December 23 | 68.0°F(20.0°C) | 52.8°F(11.6°C) | 59.7°F(15.4°C) | 0.00"(0.0 mm) |
| December 24 | 74.2°F(23.4°C) | 44.5°F(7.0°C) | 58.8°F(14.9°C) | 0.00"(0.0 mm) |
| December 25 | 75.1°F(23.9°C) | 41.4°F(5.2°C) | 56.0°F(13.4°C) | 0.00"(0.0 mm) |
| December 26 | 74.9°F(23.8°C) | 38.4°F(3.5°C) | 54.7°F(12.6°C) | 0.00"(0.0 mm) |
| December 27 | 76.2°F(24.5°C) | 38.5°F(3.6°C) | 55.0°F(12.8°C) | 0.00"(0.0 mm) |
| December 28 | 80.5°F(26.9°C) | 41.5°F(5.3°C) | 59.0°F(15.0°C) | 0.00"(0.0 mm) |
| December 29 | 79.2°F(26.2°C) | 46.9°F(8.3°C) | 61.1°F(16.2°C) | 0.00"(0.0 mm) |
| December 30 | 77.9°F(25.5°C) | 46.3°F(8.0°C) | 60.5°F(15.8°C) | 0.00"(0.0 mm) |
| December 31 | 85.6°F(29.8°C) | 44.3°F(6.8°C) | 62.8°F(17.1°C) | 0.00"(0.0 mm) |