Weather in Mount Wilson, CA
Mount Wilson, Tuesday, 20 October, 23:11
Mostly clear. Feels like 49°. High 65°, low 45°.
Monthly outlook for Mount Wilson, CA: average high 63.8°, average low 46.5°. That is 7° below the climate normal for October. Precipitation is expected on 3 days (about 1.6 inches), against a normal of 1 days and 0.4 inches. The warmest day looks like 27 October (72°), the coolest 23 October (31.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 62° | 77.2° | -8.4° |
| 30 October – 8 November | 66.7° | 74.2° | -4.2° |
| 9 November – 18 November | at normal | 70.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Altadena (5 mi).
1.11
Mount Wilson, Wednesday, 21 October
Heavy rain. High 60°, low 44°.
0.44Mount Wilson, Thursday, 22 October
Rain. High 52°, low 32°.
0
Mount Wilson, Friday, 23 October
Mostly clear. High 51°, low 32°.
0
Mount Wilson, Saturday, 24 October
Clear. High 54°, low 35°.
0Mount Wilson, Sunday, 25 October
Clear. High 57°, low 41°.
0
Mount Wilson, Monday, 26 October
Overcast. High 68°, low 41°.
0
Mount Wilson, Tuesday, 27 October
Partly cloudy. High 72°, low 54°.
0Mount Wilson, Wednesday, 28 October
Overcast. High 72°, low 57°.
0Mount Wilson, Thursday, 29 October
Overcast. High 69°, low 56°.
0Mount Wilson, Friday, 30 October
Overcast. High 63°, low 49°.
0Mount Wilson, Saturday, 31 October
Mostly clear. High 62°, low 46°.
0Mount Wilson, Sunday, 1 November
Clear. High 69°, low 50°.
0Mount Wilson, Monday, 2 November
Clear. High 72°, low 55°.
0Mount Wilson, Tuesday, 3 November
Light rain. High 71°, low 55°.
0.07Mount Wilson, Wednesday, 4 November
Light rain. High 64°, low 53°.
0.01Mount Wilson, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Mount Wilson, Friday, 6 November
Climate normal for this date — 60-year average.
0.08Mount Wilson, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09Mount Wilson, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Mount Wilson, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Mount Wilson, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.06Mount Wilson, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.02Mount Wilson, Thursday, 12 November
Climate normal for this date — 60-year average.
0.03Mount Wilson, Friday, 13 November
Climate normal for this date — 60-year average.
0.05Mount Wilson, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Mount Wilson, Sunday, 15 November
Climate normal for this date — 60-year average.
0.04Mount Wilson, Monday, 16 November
Climate normal for this date — 60-year average.
0.05Mount Wilson, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Mount Wilson, 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 Mount Wilson, 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 Mount Wilson, 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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