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Simi Valley, California Weather Summary
December,
2018
| 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: | 78.8°F (26.0°C) | at 2:11PM Dec 20 | 66.2°F (19.0°C) | 65°F (19°C) |
| Low Temperature: | 38.6°F (3.7°C) | at 1:56AM Dec 29 | 46.4°F (8.0°C) | 47°F (8°C) |
| Month Average: | 55.6°F (13.1°C) | for 31 days | ||
| Normal Average: | 56°F (13°C) | |||
| Precipitation: | 1.75" (44.4 mm) | |||
| Date | High | Low | Average | Precipitation |
| December 1 | 61.5°F(16.4°C) | 43.8°F(6.5°C) | 53.1°F(11.7°C) | 0.00"(0.0 mm) |
| December 2 | 60.4°F(15.8°C) | 40.5°F(4.7°C) | 51.6°F(10.9°C) | 0.00"(0.0 mm) |
| December 3 | 64.7°F(18.2°C) | 48.9°F(9.4°C) | 56.3°F(13.5°C) | 0.00"(0.0 mm) |
| December 4 | 65.1°F(18.4°C) | 52.7°F(11.5°C) | 57.6°F(14.2°C) | 0.00"(0.0 mm) |
| December 5 | 58.0°F(14.4°C) | 47.9°F(8.8°C) | 52.3°F(11.3°C) | 0.81"(20.5 mm) |
| December 6 | 51.2°F(10.7°C) | 45.1°F(7.3°C) | 48.7°F(9.3°C) | 0.94"(23.8 mm) |
| December 7 | 62.8°F(17.1°C) | 50.3°F(10.2°C) | 56.4°F(13.5°C) | 0.00"(0.0 mm) |
| December 8 | 69.8°F(21.0°C) | 53.3°F(11.8°C) | 59.8°F(15.5°C) | 0.00"(0.0 mm) |
| December 9 | 67.3°F(19.6°C) | 56.8°F(13.8°C) | 60.9°F(16.1°C) | 0.00"(0.0 mm) |
| December 10 | 70.1°F(21.2°C) | 53.1°F(11.7°C) | 60.9°F(16.1°C) | 0.00"(0.0 mm) |
| December 11 | 69.5°F(20.8°C) | 51.9°F(11.0°C) | 61.0°F(16.1°C) | 0.00"(0.0 mm) |
| December 12 | 70.9°F(21.6°C) | 45.4°F(7.5°C) | 56.6°F(13.7°C) | 0.00"(0.0 mm) |
| December 13 | 71.3°F(21.8°C) | 41.8°F(5.4°C) | 58.5°F(14.7°C) | 0.00"(0.0 mm) |
| December 14 | 66.5°F(19.2°C) | 50.7°F(10.4°C) | 60.2°F(15.7°C) | 0.00"(0.0 mm) |
| December 15 | 73.4°F(23.0°C) | 42.5°F(5.8°C) | 55.3°F(13.0°C) | 0.00"(0.0 mm) |
| December 16 | 71.5°F(21.9°C) | 43.0°F(6.1°C) | 54.7°F(12.6°C) | 0.00"(0.0 mm) |
| December 17 | 61.8°F(16.6°C) | 50.2°F(10.1°C) | 55.8°F(13.2°C) | 0.00"(0.0 mm) |
| December 18 | 65.7°F(18.7°C) | 45.2°F(7.3°C) | 55.4°F(13.0°C) | 0.00"(0.0 mm) |
| December 19 | 76.6°F(24.8°C) | 51.0°F(10.6°C) | 63.2°F(17.3°C) | 0.00"(0.0 mm) |
| December 20 | 78.8°F(26.0°C) | 47.1°F(8.4°C) | 59.3°F(15.2°C) | 0.00"(0.0 mm) |
| December 21 | 72.1°F(22.3°C) | 49.9°F(9.9°C) | 58.9°F(14.9°C) | 0.00"(0.0 mm) |
| December 22 | 73.4°F(23.0°C) | 45.0°F(7.2°C) | 56.0°F(13.3°C) | 0.00"(0.0 mm) |
| December 23 | 68.3°F(20.2°C) | 44.5°F(6.9°C) | 54.4°F(12.5°C) | 0.00"(0.0 mm) |
| December 24 | 70.2°F(21.2°C) | 43.5°F(6.4°C) | 55.8°F(13.2°C) | 0.00"(0.0 mm) |
| December 25 | 61.7°F(16.5°C) | 47.9°F(8.8°C) | 54.7°F(12.6°C) | 0.00"(0.0 mm) |
| December 26 | 68.1°F(20.1°C) | 44.1°F(6.7°C) | 55.0°F(12.8°C) | 0.00"(0.0 mm) |
| December 27 | 60.1°F(15.6°C) | 41.4°F(5.2°C) | 49.3°F(9.6°C) | 0.00"(0.0 mm) |
| December 28 | 57.4°F(14.1°C) | 40.4°F(4.6°C) | 49.1°F(9.5°C) | 0.00"(0.0 mm) |
| December 29 | 59.5°F(15.3°C) | 38.6°F(3.7°C) | 50.3°F(10.1°C) | 0.00"(0.0 mm) |
| December 30 | 64.8°F(18.2°C) | 41.4°F(5.2°C) | 52.6°F(11.5°C) | 0.00"(0.0 mm) |
| December 31 | 59.2°F(15.1°C) | 42.1°F(5.6°C) | 50.5°F(10.3°C) | 0.00"(0.0 mm) |