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San Bernardino, California Weather Summary
December,
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 | 31 |
| Extremes | Average | Normal | ||
| High Temperature: | 84.0°F (28.9°C) | at 1:47PM Dec 8 | 65.9°F (18.8°C) | 66°F (19°C) |
| Low Temperature: | 31.3°F (0.4°C) | at 7:33AM Dec 28 | 42.7°F (6.0°C) | 44°F (7°C) |
| Month Average: | 53.8°F (12.1°C) | for 30 days | ||
| Normal Average: | 55°F (13°C) | |||
| Precipitation: | 1.40" (35.5 mm) | |||
| Date | High | Low | Average | Precipitation |
| December 1 | 72.3°F(22.4°C) | 38.7°F(3.7°C) | 54.3°F(12.4°C) | 0.00"(0.0 mm) |
| December 2 | 77.7°F(25.4°C) | 43.7°F(6.5°C) | 58.8°F(14.9°C) | 0.00"(0.0 mm) |
| December 3 | 77.1°F(25.0°C) | 46.3°F(7.9°C) | 59.8°F(15.4°C) | 0.00"(0.0 mm) |
| December 4 | 66.4°F(19.1°C) | 42.4°F(5.8°C) | 52.8°F(11.5°C) | 0.00"(0.0 mm) |
| December 5 | 74.4°F(23.5°C) | 40.9°F(5.0°C) | 57.4°F(14.1°C) | 0.00"(0.0 mm) |
| December 6 | 79.8°F(26.6°C) | 48.0°F(8.9°C) | 60.8°F(16.0°C) | 0.00"(0.0 mm) |
| December 7 | 82.3°F(27.9°C) | 47.9°F(8.8°C) | 63.3°F(17.4°C) | 0.00"(0.0 mm) |
| December 8 | 84.0°F(28.9°C) | 51.8°F(11.0°C) | 66.6°F(19.2°C) | 0.00"(0.0 mm) |
| December 9 | 80.3°F(26.8°C) | 50.4°F(10.2°C) | 63.6°F(17.6°C) | 0.00"(0.0 mm) |
| December 10 | 71.7°F(22.1°C) | 47.5°F(8.6°C) | 58.7°F(14.8°C) | 0.08"(2.0 mm) |
| December 11 | 58.5°F(14.7°C) | 49.7°F(9.9°C) | 54.0°F(12.2°C) | 0.22"(5.5 mm) |
| December 12 | 63.1°F(17.3°C) | 47.1°F(8.4°C) | 56.0°F(13.3°C) | 0.00"(0.0 mm) |
| December 13 | 63.5°F(17.5°C) | 39.1°F(4.0°C) | 52.4°F(11.4°C) | 0.30"(7.6 mm) |
| December 14 | 56.5°F(13.6°C) | 41.2°F(5.1°C) | 49.2°F(9.6°C) | 0.00"(0.0 mm) |
| December 15 | 57.6°F(14.2°C) | 44.2°F(6.8°C) | 50.4°F(10.2°C) | 0.04"(1.0 mm) |
| December 16 | 60.6°F(15.9°C) | 38.1°F(3.4°C) | 49.7°F(9.8°C) | 0.00"(0.0 mm) |
| December 17 | 67.0°F(19.5°C) | 35.5°F(1.9°C) | 50.0°F(10.0°C) | 0.00"(0.0 mm) |
| December 18 | 71.6°F(22.0°C) | 41.0°F(5.0°C) | 54.8°F(12.7°C) | 0.00"(0.0 mm) |
| December 19 | 62.8°F(17.1°C) | 38.9°F(3.9°C) | 52.0°F(11.1°C) | 0.21"(5.3 mm) |
| December 20 | 58.7°F(14.8°C) | 43.0°F(6.1°C) | 51.0°F(10.5°C) | 0.00"(0.0 mm) |
| December 21 | 59.4°F(15.2°C) | 39.4°F(4.1°C) | 50.0°F(10.0°C) | 0.01"(0.2 mm) |
| December 22 | 58.2°F(14.5°C) | 49.8°F(9.9°C) | 54.5°F(12.5°C) | 0.43"(10.9 mm) |
| December 23 | 63.4°F(17.4°C) | 51.0°F(10.5°C) | 57.0°F(13.9°C) | 0.01"(0.2 mm) |
| December 24 | 59.7°F(15.4°C) | 43.9°F(6.6°C) | 52.0°F(11.1°C) | 0.00"(0.0 mm) |
| December 25 | 55.8°F(13.2°C) | 42.5°F(5.8°C) | 49.5°F(9.7°C) | 0.00"(0.0 mm) |
| December 26 | 56.5°F(13.6°C) | 42.1°F(5.6°C) | 49.2°F(9.6°C) | 0.06"(1.5 mm) |
| December 27 | 60.4°F(15.8°C) | 34.4°F(1.3°C) | 47.5°F(8.6°C) | 0.00"(0.0 mm) |
| December 28 | 54.6°F(12.6°C) | 31.3°F(0.4°C) | 42.9°F(6.1°C) | 0.04"(1.0 mm) |
| December 29 | 59.9°F(15.5°C) | 38.4°F(3.6°C) | 48.8°F(9.3°C) | 0.00"(0.0 mm) |
| December 30 | 62.0°F(16.7°C) | 34.0°F(1.1°C) | 46.9°F(8.3°C) | 0.00"(0.0 mm) |
| December 31 | 60.5°F(15.8°C) | 37.1°F(2.9°C) | N/A | 0.00"(0.0 mm) |