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Simi Valley, California Weather Summary
December,
2019
| 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: | 74.1°F (23.4°C) | at 1:01PM Dec 12 | 62.5°F (17.0°C) | 65°F (19°C) |
| Low Temperature: | 35.8°F (2.1°C) | at 6:42AM Dec 28 | 46.2°F (7.9°C) | 47°F (8°C) |
| Month Average: | 53.8°F (12.1°C) | for 31 days | ||
| Normal Average: | 56°F (13°C) | |||
| Precipitation: | 4.71" (119.6 mm) | |||
| Date | High | Low | Average | Precipitation |
| December 1 | 58.3°F(14.6°C) | 45.5°F(7.5°C) | 51.5°F(10.8°C) | 0.00"(0.0 mm) |
| December 2 | 69.5°F(20.8°C) | 48.6°F(9.2°C) | 56.6°F(13.7°C) | 0.00"(0.0 mm) |
| December 3 | 64.4°F(18.0°C) | 48.7°F(9.3°C) | 58.4°F(14.7°C) | 0.00"(0.0 mm) |
| December 4 | 59.5°F(15.3°C) | 51.1°F(10.6°C) | 54.9°F(12.7°C) | 1.19"(30.2 mm) |
| December 5 | 64.7°F(18.2°C) | 49.9°F(9.9°C) | 57.1°F(13.9°C) | 0.00"(0.0 mm) |
| December 6 | 65.7°F(18.7°C) | 55.4°F(13.0°C) | 58.8°F(14.9°C) | 0.14"(3.5 mm) |
| December 7 | 61.5°F(16.4°C) | 56.0°F(13.3°C) | 57.9°F(14.4°C) | 0.16"(4.0 mm) |
| December 8 | 60.4°F(15.8°C) | 50.2°F(10.1°C) | 56.2°F(13.4°C) | 0.43"(10.9 mm) |
| December 9 | 67.7°F(19.8°C) | 46.4°F(8.0°C) | 55.5°F(13.1°C) | 0.00"(0.0 mm) |
| December 10 | 66.8°F(19.4°C) | 43.2°F(6.2°C) | 52.4°F(11.3°C) | 0.00"(0.0 mm) |
| December 11 | 66.6°F(19.2°C) | 42.2°F(5.7°C) | 53.3°F(11.8°C) | 0.00"(0.0 mm) |
| December 12 | 74.1°F(23.4°C) | 47.2°F(8.4°C) | 59.4°F(15.2°C) | 0.00"(0.0 mm) |
| December 13 | 69.2°F(20.7°C) | 49.0°F(9.4°C) | 57.7°F(14.3°C) | 0.00"(0.0 mm) |
| December 14 | 64.0°F(17.8°C) | 46.1°F(7.8°C) | 54.2°F(12.4°C) | 0.00"(0.0 mm) |
| December 15 | 57.1°F(13.9°C) | 41.0°F(5.0°C) | 49.8°F(9.9°C) | 0.00"(0.0 mm) |
| December 16 | 59.9°F(15.5°C) | 48.7°F(9.3°C) | 53.9°F(12.1°C) | 0.00"(0.0 mm) |
| December 17 | 58.9°F(14.9°C) | 49.8°F(9.9°C) | 53.3°F(11.8°C) | 0.00"(0.0 mm) |
| December 18 | 61.2°F(16.2°C) | 40.3°F(4.6°C) | 50.1°F(10.0°C) | 0.00"(0.0 mm) |
| December 19 | 65.6°F(18.7°C) | 39.8°F(4.3°C) | 55.3°F(12.9°C) | 0.00"(0.0 mm) |
| December 20 | 69.6°F(20.9°C) | 55.5°F(13.1°C) | 61.2°F(16.2°C) | 0.00"(0.0 mm) |
| December 21 | 69.7°F(20.9°C) | 50.8°F(10.5°C) | 60.7°F(16.0°C) | 0.00"(0.0 mm) |
| December 22 | 65.3°F(18.5°C) | 47.7°F(8.7°C) | 55.4°F(13.0°C) | 1.10"(27.9 mm) |
| December 23 | 55.9°F(13.3°C) | 46.1°F(7.8°C) | 50.8°F(10.4°C) | 0.28"(7.1 mm) |
| December 24 | 57.7°F(14.3°C) | 39.3°F(4.1°C) | 47.8°F(8.8°C) | 0.00"(0.0 mm) |
| December 25 | 54.5°F(12.5°C) | 41.8°F(5.4°C) | 47.9°F(8.8°C) | 1.10"(27.9 mm) |
| December 26 | 51.8°F(11.0°C) | 40.1°F(4.5°C) | 45.4°F(7.4°C) | 0.31"(7.8 mm) |
| December 27 | 58.1°F(14.5°C) | 38.5°F(3.6°C) | 47.8°F(8.8°C) | 0.00"(0.0 mm) |
| December 28 | 60.5°F(15.8°C) | 35.8°F(2.1°C) | 47.3°F(8.5°C) | 0.00"(0.0 mm) |
| December 29 | 58.4°F(14.7°C) | 39.4°F(4.1°C) | 48.2°F(9.0°C) | 0.00"(0.0 mm) |
| December 30 | 57.8°F(14.3°C) | 47.1°F(8.4°C) | 51.8°F(11.0°C) | 0.00"(0.0 mm) |
| December 31 | 63.8°F(17.7°C) | 52.4°F(11.3°C) | 57.2°F(14.0°C) | 0.00"(0.0 mm) |