Weather in Mount Wilson, CA
Mount Wilson, Sunday, 25 October, 03:44
Clear. Feels like 44°. High 65°, low 44°.
Monthly outlook for Mount Wilson, CA: average high 55.9°, average low 42.1°. That is 10.4° below the climate normal for October. Precipitation is expected on 3 days (about 2.9 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 9 November (66.6°), the coolest 29 October (38.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 25 October – 3 November | 54.5° | 75.7° | -11.7° |
| 4 November – 13 November | 58.1° | 72.3° | -7.9° |
| 14 November – 23 November | at normal | 69.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Altadena (5 mi).
0
Mount Wilson, Monday, 26 October
Clear. High 65°, low 43°.
0Mount Wilson, Tuesday, 27 October
Clear. High 54°, low 39°.
0
Mount Wilson, Wednesday, 28 October
Mostly clear. High 54°, low 39°.
0
Mount Wilson, Thursday, 29 October
Overcast. High 51°, low 38°.
0Mount Wilson, Friday, 30 October
Clear. High 50°, low 38°.
0.56
Mount Wilson, Saturday, 31 October
Rain. High 50°, low 42°.
1.97Mount Wilson, Sunday, 1 November
Heavy rain. High 50°, low 42°.
0Mount Wilson, Monday, 2 November
Overcast. High 51°, low 39°.
0Mount Wilson, Tuesday, 3 November
Overcast. High 56°, low 42°.
0Mount Wilson, Wednesday, 4 November
Mostly clear. High 57°, low 44°.
0Mount Wilson, Thursday, 5 November
Overcast. High 59°, low 45°.
0Mount Wilson, Friday, 6 November
Overcast. High 59°, low 47°.
0.37Mount Wilson, Saturday, 7 November
Rain. High 48°, low 44°.
0Mount Wilson, Sunday, 8 November
Clear. High 60°, low 41°.
0Mount Wilson, Monday, 9 November
Clear. High 67°, low 47°.
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.
0.05Mount Wilson, Thursday, 19 November
Climate normal for this date — 60-year average.
0.07Mount Wilson, Friday, 20 November
Climate normal for this date — 60-year average.
0.09Mount Wilson, Saturday, 21 November
Climate normal for this date — 60-year average.
0.06Mount Wilson, Sunday, 22 November
Climate normal for this date — 60-year average.
0.01Mount Wilson, Monday, 23 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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