Currently
70°F
in Simi Valley, California, USA
70°F / 52°F
calm
0.01"
Friday, October 23, 2026 1:43 PM PDT
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Simi Valley, California Weather Summary
September,
2026
| 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: | 103.7°F (39.8°C) | at 1:38PM Sep 9 | 84.7°F (29.3°C) | 86°F (30°C) |
| Low Temperature: | 54.2°F (12.3°C) | at 7:10AM Sep 1 | 61.2°F (16.2°C) | 61°F (16°C) |
| Month Average: | 71.5°F (21.9°C) | for 30 days | ||
| Normal Average: | 72°F (22°C) | |||
| Precipitation: | 0.60" (15.2 mm) | |||
| Date | High | Low | Average | Precipitation |
| September 1 | 81.6°F(27.5°C) | 54.2°F(12.3°C) | 67.4°F(19.6°C) | 0.00"(0.0 mm) |
| September 2 | 80.4°F(26.9°C) | 54.8°F(12.7°C) | 67.0°F(19.5°C) | 0.00"(0.0 mm) |
| September 3 | 81.7°F(27.6°C) | 57.1°F(14.0°C) | 67.9°F(19.9°C) | 0.00"(0.0 mm) |
| September 4 | 82.7°F(28.1°C) | 57.4°F(14.1°C) | 68.2°F(20.1°C) | 0.00"(0.0 mm) |
| September 5 | 89.4°F(31.9°C) | 57.1°F(14.0°C) | 71.6°F(22.0°C) | 0.00"(0.0 mm) |
| September 6 | 72.5°F(22.5°C) | 65.3°F(18.5°C) | 68.6°F(20.4°C) | 0.56"(14.2 mm) |
| September 7 | 88.8°F(31.6°C) | 66.1°F(18.9°C) | 74.3°F(23.5°C) | 0.01"(0.2 mm) |
| September 8 | 84.5°F(29.1°C) | 68.2°F(20.1°C) | 73.9°F(23.3°C) | 0.03"(0.7 mm) |
| September 9 | 103.7°F(39.8°C) | 68.8°F(20.4°C) | 84.1°F(28.9°C) | 0.00"(0.0 mm) |
| September 10 | 97.9°F(36.6°C) | 74.1°F(23.4°C) | 84.6°F(29.2°C) | 0.00"(0.0 mm) |
| September 11 | 90.9°F(32.7°C) | 70.2°F(21.2°C) | 79.2°F(26.2°C) | 0.00"(0.0 mm) |
| September 12 | 88.9°F(31.6°C) | 66.5°F(19.2°C) | 74.7°F(23.7°C) | 0.00"(0.0 mm) |
| September 13 | 82.4°F(28.0°C) | 62.2°F(16.8°C) | 71.5°F(21.9°C) | 0.00"(0.0 mm) |
| September 14 | 84.1°F(28.9°C) | 59.2°F(15.1°C) | 70.7°F(21.5°C) | 0.00"(0.0 mm) |
| September 15 | 83.1°F(28.4°C) | 62.6°F(17.0°C) | 70.5°F(21.4°C) | 0.00"(0.0 mm) |
| September 16 | 80.1°F(26.7°C) | 64.7°F(18.2°C) | 69.6°F(20.9°C) | 0.00"(0.0 mm) |
| September 17 | 77.9°F(25.5°C) | 59.3°F(15.2°C) | 68.4°F(20.2°C) | 0.00"(0.0 mm) |
| September 18 | 78.4°F(25.8°C) | 56.0°F(13.3°C) | 66.0°F(18.9°C) | 0.00"(0.0 mm) |
| September 19 | 81.4°F(27.4°C) | 56.6°F(13.7°C) | 67.4°F(19.7°C) | 0.00"(0.0 mm) |
| September 20 | 82.1°F(27.8°C) | 59.7°F(15.4°C) | 67.2°F(19.6°C) | 0.00"(0.0 mm) |
| September 21 | 77.8°F(25.5°C) | 59.6°F(15.3°C) | 67.7°F(19.8°C) | 0.00"(0.0 mm) |
| September 22 | 79.9°F(26.6°C) | 57.1°F(14.0°C) | 66.9°F(19.4°C) | 0.00"(0.0 mm) |
| September 23 | 88.8°F(31.5°C) | 58.3°F(14.6°C) | 72.3°F(22.4°C) | 0.00"(0.0 mm) |
| September 24 | 85.5°F(29.7°C) | 59.5°F(15.3°C) | 70.5°F(21.4°C) | 0.00"(0.0 mm) |
| September 25 | 85.4°F(29.7°C) | 60.8°F(16.0°C) | 71.5°F(22.0°C) | 0.00"(0.0 mm) |
| September 26 | 90.3°F(32.4°C) | 62.1°F(16.7°C) | 75.4°F(24.1°C) | 0.00"(0.0 mm) |
| September 27 | 88.0°F(31.1°C) | 62.8°F(17.1°C) | 74.3°F(23.5°C) | 0.00"(0.0 mm) |
| September 28 | 79.9°F(26.6°C) | 58.4°F(14.6°C) | 68.3°F(20.2°C) | 0.00"(0.0 mm) |
| September 29 | 87.4°F(30.8°C) | 58.6°F(14.8°C) | 72.6°F(22.6°C) | 0.00"(0.0 mm) |
| September 30 | 86.6°F(30.3°C) | 59.8°F(15.5°C) | 71.5°F(21.9°C) | 0.00"(0.0 mm) |