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San Bernardino, California Weather Summary
December,
2012
| 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: | 78.3°F (25.7°C) | at 12:37PM Dec 7 | 63.2°F (17.3°C) | 66°F (19°C) |
| Low Temperature: | 34.8°F (1.5°C) | at 7:11AM Dec 20 | 44.9°F (7.2°C) | 44°F (7°C) |
| Month Average: | 53.5°F (11.9°C) | for 31 days | ||
| Normal Average: | 55°F (13°C) | |||
| Precipitation: | 3.46" (87.8 mm) | |||
| Date | High | Low | Average | Precipitation |
| December 1 | 63.7°F(17.6°C) | 56.3°F(13.5°C) | 59.9°F(15.5°C) | 0.02"(0.5 mm) |
| December 2 | 62.8°F(17.1°C) | 57.6°F(14.2°C) | 59.5°F(15.3°C) | 0.14"(3.5 mm) |
| December 3 | 67.8°F(19.9°C) | 56.4°F(13.6°C) | 60.2°F(15.7°C) | 0.13"(3.3 mm) |
| December 4 | 72.2°F(22.3°C) | 52.6°F(11.5°C) | 61.1°F(16.2°C) | 0.00"(0.0 mm) |
| December 5 | 75.8°F(24.3°C) | 46.2°F(7.9°C) | 59.7°F(15.4°C) | 0.00"(0.0 mm) |
| December 6 | 67.1°F(19.5°C) | 51.3°F(10.7°C) | 57.2°F(14.0°C) | 0.00"(0.0 mm) |
| December 7 | 78.3°F(25.7°C) | 48.1°F(9.0°C) | 61.3°F(16.3°C) | 0.00"(0.0 mm) |
| December 8 | 72.3°F(22.4°C) | 44.5°F(6.9°C) | 57.7°F(14.3°C) | 0.00"(0.0 mm) |
| December 9 | 71.0°F(21.7°C) | 43.8°F(6.5°C) | 56.7°F(13.7°C) | 0.00"(0.0 mm) |
| December 10 | 76.2°F(24.5°C) | 49.6°F(9.8°C) | 61.0°F(16.1°C) | 0.00"(0.0 mm) |
| December 11 | 74.6°F(23.7°C) | 44.0°F(6.7°C) | 58.2°F(14.6°C) | 0.00"(0.0 mm) |
| December 12 | 62.6°F(17.0°C) | 43.7°F(6.5°C) | 53.9°F(12.1°C) | 0.17"(4.3 mm) |
| December 13 | 53.7°F(12.1°C) | 47.0°F(8.3°C) | 51.5°F(10.8°C) | 1.59"(40.3 mm) |
| December 14 | 55.5°F(13.1°C) | 44.1°F(6.7°C) | 49.2°F(9.5°C) | 0.04"(1.0 mm) |
| December 15 | 56.5°F(13.6°C) | 43.3°F(6.3°C) | 49.7°F(9.8°C) | 0.07"(1.7 mm) |
| December 16 | 55.2°F(12.9°C) | 48.2°F(9.0°C) | 51.6°F(10.9°C) | 0.00"(0.0 mm) |
| December 17 | 60.9°F(16.1°C) | 50.5°F(10.3°C) | 55.8°F(13.2°C) | 0.00"(0.0 mm) |
| December 18 | 57.5°F(14.2°C) | 46.8°F(8.2°C) | 52.9°F(11.6°C) | 0.31"(7.8 mm) |
| December 19 | 59.2°F(15.1°C) | 38.7°F(3.7°C) | 48.8°F(9.3°C) | 0.04"(1.0 mm) |
| December 20 | 61.1°F(16.2°C) | 34.8°F(1.5°C) | 46.9°F(8.3°C) | 0.00"(0.0 mm) |
| December 21 | 65.1°F(18.4°C) | 34.9°F(1.6°C) | 49.0°F(9.5°C) | 0.00"(0.0 mm) |
| December 22 | 61.5°F(16.4°C) | 36.0°F(2.2°C) | 49.3°F(9.6°C) | 0.00"(0.0 mm) |
| December 23 | 60.4°F(15.8°C) | 49.2°F(9.6°C) | 54.7°F(12.6°C) | 0.00"(0.0 mm) |
| December 24 | 62.3°F(16.8°C) | 48.2°F(9.0°C) | 54.2°F(12.3°C) | 0.36"(9.1 mm) |
| December 25 | 59.9°F(15.5°C) | 43.5°F(6.4°C) | 50.7°F(10.4°C) | 0.00"(0.0 mm) |
| December 26 | 55.8°F(13.2°C) | 43.4°F(6.3°C) | 48.9°F(9.4°C) | 0.21"(5.3 mm) |
| December 27 | 59.3°F(15.2°C) | 40.3°F(4.6°C) | 49.0°F(9.4°C) | 0.01"(0.2 mm) |
| December 28 | 61.0°F(16.1°C) | 35.4°F(1.9°C) | 48.4°F(9.1°C) | 0.00"(0.0 mm) |
| December 29 | 55.9°F(13.3°C) | 36.2°F(2.3°C) | 45.4°F(7.5°C) | 0.32"(8.1 mm) |
| December 30 | 53.5°F(11.9°C) | 39.8°F(4.3°C) | 47.0°F(8.3°C) | 0.04"(1.0 mm) |
| December 31 | 60.0°F(15.5°C) | 38.2°F(3.4°C) | 49.1°F(9.5°C) | 0.01"(0.2 mm) |