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San Bernardino, California Weather Summary
December,
2013
| 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: | 84.3°F (29.1°C) | at 1:25PM Dec 17 | 69.0°F (20.6°C) | 66°F (19°C) |
| Low Temperature: | 32.5°F (0.3°C) | at 5:12AM Dec 10 | 44.5°F (6.9°C) | 44°F (7°C) |
| Month Average: | 56.0°F (13.3°C) | for 31 days | ||
| Normal Average: | 55°F (13°C) | |||
| Precipitation: | 1.25" (31.7 mm) | |||
| Date | High | Low | Average | Precipitation |
| December 1 | 78.1°F(25.6°C) | 51.9°F(11.1°C) | 62.6°F(17.0°C) | 0.00"(0.0 mm) |
| December 2 | 75.9°F(24.4°C) | 47.1°F(8.4°C) | 58.7°F(14.8°C) | 0.00"(0.0 mm) |
| December 3 | 67.0°F(19.5°C) | 44.1°F(6.7°C) | 55.8°F(13.2°C) | 0.03"(0.7 mm) |
| December 4 | 59.0°F(15.0°C) | 46.1°F(7.8°C) | 52.1°F(11.2°C) | 0.01"(0.2 mm) |
| December 5 | 57.5°F(14.2°C) | 40.6°F(4.8°C) | 49.1°F(9.5°C) | 0.00"(0.0 mm) |
| December 6 | 55.9°F(13.3°C) | 41.5°F(5.3°C) | 49.3°F(9.6°C) | 0.00"(0.0 mm) |
| December 7 | 50.4°F(10.2°C) | 44.0°F(6.7°C) | 47.5°F(8.6°C) | 0.29"(7.3 mm) |
| December 8 | 55.4°F(13.0°C) | 40.1°F(4.5°C) | 46.4°F(8.0°C) | 0.00"(0.0 mm) |
| December 9 | 56.1°F(13.4°C) | 35.1°F(1.7°C) | 45.0°F(7.2°C) | 0.60"(15.2 mm) |
| December 10 | 63.1°F(17.3°C) | 32.5°F(0.3°C) | 46.7°F(8.2°C) | 0.00"(0.0 mm) |
| December 11 | 68.6°F(20.3°C) | 35.3°F(1.8°C) | 51.5°F(10.9°C) | 0.00"(0.0 mm) |
| December 12 | 68.5°F(20.3°C) | 42.4°F(5.8°C) | 54.2°F(12.3°C) | 0.00"(0.0 mm) |
| December 13 | 64.9°F(18.3°C) | 38.2°F(3.5°C) | 52.0°F(11.1°C) | 0.00"(0.0 mm) |
| December 14 | 72.0°F(22.2°C) | 50.6°F(10.4°C) | 62.1°F(16.7°C) | 0.08"(2.0 mm) |
| December 15 | 78.0°F(25.5°C) | 46.5°F(8.1°C) | 60.1°F(15.6°C) | 0.00"(0.0 mm) |
| December 16 | 82.6°F(28.1°C) | 50.9°F(10.5°C) | 64.7°F(18.2°C) | 0.00"(0.0 mm) |
| December 17 | 84.3°F(29.1°C) | 54.5°F(12.5°C) | 67.0°F(19.4°C) | 0.00"(0.0 mm) |
| December 18 | 74.9°F(23.8°C) | 53.5°F(12.0°C) | 62.6°F(17.0°C) | 0.00"(0.0 mm) |
| December 19 | 54.4°F(12.4°C) | 45.6°F(7.5°C) | 50.9°F(10.5°C) | 0.23"(5.8 mm) |
| December 20 | 62.4°F(16.9°C) | 45.5°F(7.5°C) | 54.4°F(12.4°C) | 0.01"(0.2 mm) |
| December 21 | 58.8°F(14.9°C) | 40.1°F(4.5°C) | 49.8°F(9.9°C) | 0.00"(0.0 mm) |
| December 22 | 68.9°F(20.5°C) | 38.5°F(3.6°C) | 52.7°F(11.5°C) | 0.00"(0.0 mm) |
| December 23 | 74.1°F(23.4°C) | 44.5°F(7.0°C) | 58.1°F(14.5°C) | 0.00"(0.0 mm) |
| December 24 | 79.6°F(26.5°C) | 47.1°F(8.4°C) | 62.7°F(17.0°C) | 0.00"(0.0 mm) |
| December 25 | 76.2°F(24.6°C) | 50.8°F(10.5°C) | 63.7°F(17.6°C) | 0.00"(0.0 mm) |
| December 26 | 77.8°F(25.4°C) | 47.9°F(8.8°C) | 60.7°F(15.9°C) | 0.00"(0.0 mm) |
| December 27 | 80.2°F(26.8°C) | 45.1°F(7.3°C) | 61.7°F(16.5°C) | 0.00"(0.0 mm) |
| December 28 | 75.9°F(24.4°C) | 48.5°F(9.1°C) | 60.0°F(15.5°C) | 0.00"(0.0 mm) |
| December 29 | 70.7°F(21.5°C) | 47.5°F(8.6°C) | 62.7°F(17.1°C) | 0.00"(0.0 mm) |
| December 30 | 73.7°F(23.2°C) | 41.6°F(5.3°C) | 56.1°F(13.4°C) | 0.00"(0.0 mm) |
| December 31 | 74.0°F(23.3°C) | 40.4°F(4.7°C) | 55.7°F(13.1°C) | 0.00"(0.0 mm) |