Weather in Simi Valley, CA
Simi Valley, Tuesday, 20 October, 20:26
Mostly clear. Feels like 66°. High 80°, low 59°.
Monthly outlook for Simi Valley, CA: average high 79.9°, average low 60.4°. That is 1.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 2 November (87.4°), the coolest 23 October (51°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 78.6° | 77.1° | +0.8° |
| 30 October – 8 November | 82.1° | 74.4° | +4.3° |
| 9 November – 18 November | at normal | 70.8° | — |
October records over 66 years
0.49
Simi Valley, Wednesday, 21 October
Rain. High 69°, low 56°.
0.24Simi Valley, Thursday, 22 October
Rain. High 66°, low 51°.
0
Simi Valley, Friday, 23 October
Clear. High 70°, low 51°.
0Simi Valley, Saturday, 24 October
Clear. High 76°, low 55°.
0Simi Valley, Sunday, 25 October
Clear. High 81°, low 56°.
0
Simi Valley, Monday, 26 October
Overcast. High 85°, low 60°.
0
Simi Valley, Tuesday, 27 October
Partly cloudy. High 87°, low 65°.
0Simi Valley, Wednesday, 28 October
Overcast. High 87°, low 68°.
0Simi Valley, Thursday, 29 October
Overcast. High 85°, low 67°.
0Simi Valley, Friday, 30 October
Overcast. High 80°, low 63°.
0Simi Valley, Saturday, 31 October
Clear. High 76°, low 60°.
0Simi Valley, Sunday, 1 November
Clear. High 83°, low 58°.
0
Simi Valley, Monday, 2 November
Mostly clear. High 87°, low 63°.
0Simi Valley, Tuesday, 3 November
Partly cloudy. High 86°, low 68°.
0Simi Valley, Wednesday, 4 November
Overcast. High 80°, low 65°.
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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