Currently
54°F
in Simi Valley, California, USA
56°F / 50°F
calm
0.00"
Thursday, March 5, 2026 6:13 AM PST
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Simi Valley, California Weather Summary
December,
2025
| 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: | 85.2°F (29.5°C) | at 2:14PM Dec 11 | 70.8°F (21.6°C) | 66°F (19°C) |
| Low Temperature: | 41.8°F (5.4°C) | at 7:16AM Dec 27 | 50.4°F (10.2°C) | 47°F (8°C) |
| Month Average: | 60.0°F (15.6°C) | for 31 days | ||
| Normal Average: | 56°F (13°C) | |||
| Precipitation: | 7.27" (184.6 mm) | |||
| Date | High | Low | Average | Precipitation |
| December 1 | 68.7°F(20.4°C) | 46.4°F(8.0°C) | 60.4°F(15.8°C) | 0.00"(0.0 mm) |
| December 2 | 68.5°F(20.3°C) | 46.8°F(8.2°C) | 56.8°F(13.8°C) | 0.00"(0.0 mm) |
| December 3 | 66.4°F(19.1°C) | 44.3°F(6.8°C) | 55.1°F(12.8°C) | 0.00"(0.0 mm) |
| December 4 | 66.4°F(19.1°C) | 52.4°F(11.3°C) | 58.9°F(15.0°C) | 0.00"(0.0 mm) |
| December 5 | 74.2°F(23.5°C) | 45.3°F(7.4°C) | 58.6°F(14.8°C) | 0.00"(0.0 mm) |
| December 6 | 70.9°F(21.6°C) | 44.8°F(7.1°C) | 55.4°F(13.0°C) | 0.00"(0.0 mm) |
| December 7 | 75.8°F(24.4°C) | 44.7°F(7.0°C) | 57.3°F(14.0°C) | 0.00"(0.0 mm) |
| December 8 | 77.2°F(25.1°C) | 50.2°F(10.1°C) | 66.9°F(19.4°C) | 0.00"(0.0 mm) |
| December 9 | 78.1°F(25.6°C) | 57.3°F(14.0°C) | 70.0°F(21.1°C) | 0.00"(0.0 mm) |
| December 10 | 82.0°F(27.8°C) | 68.2°F(20.1°C) | 74.3°F(23.5°C) | 0.00"(0.0 mm) |
| December 11 | 85.2°F(29.5°C) | 57.0°F(13.9°C) | 70.9°F(21.6°C) | 0.00"(0.0 mm) |
| December 12 | 78.7°F(26.0°C) | 50.2°F(10.1°C) | 61.5°F(16.4°C) | 0.00"(0.0 mm) |
| December 13 | 74.0°F(23.3°C) | 46.2°F(7.9°C) | 56.8°F(13.8°C) | 0.00"(0.0 mm) |
| December 14 | 72.2°F(22.3°C) | 45.8°F(7.7°C) | 56.9°F(13.8°C) | 0.00"(0.0 mm) |
| December 15 | 78.9°F(26.1°C) | 49.1°F(9.5°C) | 65.7°F(18.7°C) | 0.00"(0.0 mm) |
| December 16 | 76.9°F(24.9°C) | 53.0°F(11.7°C) | 64.3°F(17.9°C) | 0.00"(0.0 mm) |
| December 17 | 74.4°F(23.5°C) | 49.6°F(9.8°C) | 62.6°F(17.0°C) | 0.00"(0.0 mm) |
| December 18 | 81.6°F(27.6°C) | 53.0°F(11.6°C) | 65.6°F(18.7°C) | 0.00"(0.0 mm) |
| December 19 | 75.9°F(24.4°C) | 48.4°F(9.1°C) | 59.4°F(15.2°C) | 0.00"(0.0 mm) |
| December 20 | 68.0°F(20.0°C) | 47.2°F(8.4°C) | 56.2°F(13.4°C) | 0.00"(0.0 mm) |
| December 21 | 68.8°F(20.5°C) | 47.4°F(8.6°C) | 55.7°F(13.2°C) | 0.00"(0.0 mm) |
| December 22 | 70.2°F(21.2°C) | 46.7°F(8.2°C) | 57.2°F(14.0°C) | 0.00"(0.0 mm) |
| December 23 | 60.1°F(15.6°C) | 53.2°F(11.8°C) | 56.9°F(13.8°C) | 0.01"(0.2 mm) |
| December 24 | 61.6°F(16.4°C) | 55.5°F(13.1°C) | 57.2°F(14.0°C) | 4.84"(122.9 mm) |
| December 25 | 59.0°F(15.0°C) | 54.0°F(12.2°C) | 56.5°F(13.6°C) | 1.42"(36.0 mm) |
| December 26 | 59.1°F(15.0°C) | 48.8°F(9.4°C) | 55.1°F(12.8°C) | 0.75"(19.0 mm) |
| December 27 | 61.7°F(16.5°C) | 41.8°F(5.4°C) | 50.6°F(10.3°C) | 0.01"(0.2 mm) |
| December 28 | 64.0°F(17.8°C) | 48.2°F(9.0°C) | 56.9°F(13.8°C) | 0.00"(0.0 mm) |
| December 29 | 64.8°F(18.2°C) | 55.0°F(12.8°C) | 60.5°F(15.8°C) | 0.00"(0.0 mm) |
| December 30 | 66.9°F(19.4°C) | 61.6°F(16.4°C) | 63.5°F(17.5°C) | 0.00"(0.0 mm) |
| December 31 | 65.4°F(18.6°C) | 50.3°F(10.2°C) | 57.0°F(13.9°C) | 0.24"(6.1 mm) |