Currently
50°F
in Simi Valley, California, USA
50°F / 50°F
2 mph SW
0.00"
Thursday, March 5, 2026 12:36 AM PST
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Simi Valley, California Weather Summary
September,
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 |
| Extremes | Average | Normal | ||
| High Temperature: | 97.7°F (36.5°C) | at 2:20PM Sep 2 | 84.2°F (29.0°C) | 87°F (30°C) |
| Low Temperature: | 56.6°F (13.7°C) | at 6:57AM Sep 11 | 61.4°F (16.3°C) | 61°F (16°C) |
| Month Average: | 71.2°F (21.8°C) | for 30 days | ||
| Normal Average: | 72°F (22°C) | |||
| Precipitation: | 0.27" (6.8 mm) | |||
| Date | High | Low | Average | Precipitation |
| September 1 | 92.5°F(33.6°C) | 65.4°F(18.6°C) | 77.9°F(25.5°C) | 0.00"(0.0 mm) |
| September 2 | 97.7°F(36.5°C) | 65.2°F(18.4°C) | 78.2°F(25.6°C) | 0.00"(0.0 mm) |
| September 3 | 91.2°F(32.9°C) | 68.4°F(20.2°C) | 78.8°F(26.0°C) | 0.00"(0.0 mm) |
| September 4 | 88.1°F(31.2°C) | 65.7°F(18.7°C) | 76.1°F(24.5°C) | 0.00"(0.0 mm) |
| September 5 | 87.3°F(30.7°C) | 57.9°F(14.4°C) | 72.4°F(22.5°C) | 0.00"(0.0 mm) |
| September 6 | 90.0°F(32.2°C) | 56.6°F(13.7°C) | 72.0°F(22.2°C) | 0.00"(0.0 mm) |
| September 7 | 90.2°F(32.3°C) | 59.8°F(15.4°C) | 73.5°F(23.1°C) | 0.00"(0.0 mm) |
| September 8 | 85.0°F(29.5°C) | 59.4°F(15.2°C) | 70.7°F(21.5°C) | 0.00"(0.0 mm) |
| September 9 | 80.9°F(27.2°C) | 56.8°F(13.8°C) | 67.6°F(19.8°C) | 0.00"(0.0 mm) |
| September 10 | 77.3°F(25.2°C) | 58.3°F(14.6°C) | 67.0°F(19.4°C) | 0.00"(0.0 mm) |
| September 11 | 77.7°F(25.4°C) | 56.6°F(13.7°C) | 66.1°F(19.0°C) | 0.00"(0.0 mm) |
| September 12 | 78.1°F(25.6°C) | 56.9°F(13.8°C) | 66.5°F(19.2°C) | 0.00"(0.0 mm) |
| September 13 | 78.8°F(26.0°C) | 59.1°F(15.0°C) | 67.2°F(19.5°C) | 0.00"(0.0 mm) |
| September 14 | 83.4°F(28.6°C) | 59.1°F(15.1°C) | 69.1°F(20.6°C) | 0.00"(0.0 mm) |
| September 15 | 87.0°F(30.6°C) | 57.8°F(14.3°C) | 71.4°F(21.9°C) | 0.00"(0.0 mm) |
| September 16 | 94.7°F(34.8°C) | 60.4°F(15.8°C) | 76.2°F(24.6°C) | 0.00"(0.0 mm) |
| September 17 | 91.0°F(32.8°C) | 67.9°F(19.9°C) | 76.3°F(24.6°C) | 0.00"(0.0 mm) |
| September 18 | 81.1°F(27.3°C) | 65.8°F(18.8°C) | 71.2°F(21.8°C) | 0.27"(6.8 mm) |
| September 19 | 81.4°F(27.5°C) | 66.0°F(18.9°C) | 72.8°F(22.7°C) | 0.00"(0.0 mm) |
| September 20 | 85.4°F(29.7°C) | 61.9°F(16.6°C) | 71.0°F(21.7°C) | 0.00"(0.0 mm) |
| September 21 | 82.2°F(27.9°C) | 60.0°F(15.5°C) | 69.3°F(20.7°C) | 0.00"(0.0 mm) |
| September 22 | 85.6°F(29.8°C) | 61.1°F(16.2°C) | 72.3°F(22.4°C) | 0.00"(0.0 mm) |
| September 23 | 91.1°F(32.8°C) | 64.3°F(18.0°C) | 75.4°F(24.1°C) | 0.00"(0.0 mm) |
| September 24 | 85.1°F(29.5°C) | 65.8°F(18.8°C) | 73.2°F(22.9°C) | 0.00"(0.0 mm) |
| September 25 | 78.8°F(26.0°C) | 60.6°F(15.9°C) | 68.5°F(20.3°C) | 0.00"(0.0 mm) |
| September 26 | 78.3°F(25.7°C) | 63.6°F(17.6°C) | 68.6°F(20.3°C) | 0.00"(0.0 mm) |
| September 27 | 74.0°F(23.3°C) | 63.2°F(17.3°C) | 67.5°F(19.7°C) | 0.00"(0.0 mm) |
| September 28 | 77.8°F(25.5°C) | 60.7°F(15.9°C) | 67.6°F(19.8°C) | 0.00"(0.0 mm) |
| September 29 | 78.8°F(26.0°C) | 57.8°F(14.3°C) | 65.4°F(18.6°C) | 0.00"(0.0 mm) |
| September 30 | 76.0°F(24.4°C) | 58.7°F(14.8°C) | 65.9°F(18.8°C) | 0.00"(0.0 mm) |