Weather in Simi Valley, CA
Simi Valley, Tuesday, 20 October, 06:10
Clear. Feels like 57°. High 81°, low 58°.
Monthly outlook for Simi Valley, CA: average high 74.1°, average low 58.4°. That is 1.3° below the climate normal for October. Precipitation is expected on 5 days (about 2.3 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 26 October (85.8°), the coolest 31 October (53.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 76° | 77.1° | -0.6° |
| 30 October – 8 November | 70.9° | 74.4° | -1.9° |
| 9 November – 18 November | at normal | 70.8° | — |
October records over 66 years
0.48
Simi Valley, Wednesday, 21 October
Rain. High 67°, low 55°.
0.97Simi Valley, Thursday, 22 October
Heavy rain. High 66°, low 56°.
0
Simi Valley, Friday, 23 October
Clear. High 71°, low 55°.
0Simi Valley, Saturday, 24 October
Clear. High 77°, low 55°.
0Simi Valley, Sunday, 25 October
Clear. High 80°, low 58°.
0
Simi Valley, Monday, 26 October
Partly cloudy. High 86°, low 61°.
0
Simi Valley, Tuesday, 27 October
Overcast. High 85°, low 67°.
0Simi Valley, Wednesday, 28 October
Overcast. High 74°, low 62°.
0Simi Valley, Thursday, 29 October
Overcast. High 72°, low 58°.
0.11Simi Valley, Friday, 30 October
Light rain. High 66°, low 56°.
0.07Simi Valley, Saturday, 31 October
Light rain. High 66°, low 54°.
0
Simi Valley, Sunday, 1 November
Mostly clear. High 74°, low 55°.
0Simi Valley, Monday, 2 November
Overcast. High 80°, low 62°.
0Simi Valley, Tuesday, 3 November
Overcast. High 73°, low 64°.
0.69Simi Valley, Wednesday, 4 November
Rain. High 66°, low 58°.
0.01Simi Valley, Thursday, 5 November
Climate normal for this date — 60-year average.
0.03Simi Valley, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Simi Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
0.08Simi Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Simi Valley, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Simi Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.06Simi Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Simi Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
0.03Simi Valley, Friday, 13 November
Climate normal for this date — 60-year average.
0.05Simi Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Simi Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Simi Valley, Monday, 16 November
Climate normal for this date — 60-year average.
0.05Simi Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.04Simi Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Simi Valley, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Simi Valley, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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