Weather in Mount Wilson, CA
Mount Wilson, Sunday, 15 November, 04:37
Partly cloudy. Feels like 41°. High 58°, low 40°.
Monthly outlook for Mount Wilson, CA: average high 50°, average low 37°. That is 10° below the climate normal for November. Precipitation is expected on 5 days (about 3.8 inches), against a normal of 2 days and 0.9 inches. The warmest day looks like 15 November (58°), the coolest 20 November (26.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 48.4° | 69° | -11.4° |
| 25 November – 4 December | 52.7° | 66.2° | -7.5° |
| 5 December – 14 December | at normal | 64.3° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Altadena (5 mi).
0.17
Mount Wilson, Monday, 16 November
Light rain. High 56°, low 38°.
0.11Mount Wilson, Tuesday, 17 November
Rain. High 43°, low 28°.
0
Mount Wilson, Wednesday, 18 November
Clear. High 42°, low 30°.
2.39
Mount Wilson, Thursday, 19 November
Snow. High 36°, low 30°.
0Mount Wilson, Friday, 20 November
Clear. High 39°, low 26°.
0Mount Wilson, Saturday, 21 November
Clear. High 51°, low 37°.
0
Mount Wilson, Sunday, 22 November
Overcast. High 49°, low 39°.
0Mount Wilson, Monday, 23 November
Overcast. High 54°, low 39°.
0Mount Wilson, Tuesday, 24 November
Overcast. High 56°, low 44°.
1.08Mount Wilson, Wednesday, 25 November
Heavy rain. High 51°, low 41°.
0.08Mount Wilson, Thursday, 26 November
Light rain. High 49°, low 38°.
0Mount Wilson, Friday, 27 November
Clear. High 54°, low 40°.
0Mount Wilson, Saturday, 28 November
Clear. High 57°, low 41°.
0
Mount Wilson, Sunday, 29 November
Partly cloudy. High 53°, low 42°.
0Mount Wilson, Monday, 30 November
Clear. High 52°, low 39°.
0.02
Mount Wilson, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.04Mount Wilson, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.08Mount Wilson, Thursday, 3 December
Climate normal for this date — 60-year average.
0.09Mount Wilson, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Mount Wilson, Saturday, 5 December
Climate normal for this date — 60-year average.
0.13Mount Wilson, Sunday, 6 December
Climate normal for this date — 60-year average.
0.1Mount Wilson, Monday, 7 December
Climate normal for this date — 60-year average.
0.03Mount Wilson, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.03Mount Wilson, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.04Mount Wilson, Thursday, 10 December
Climate normal for this date — 60-year average.
0.09Mount Wilson, Friday, 11 December
Climate normal for this date — 60-year average.
0.06Mount Wilson, Saturday, 12 December
Climate normal for this date — 60-year average.
0.04Mount Wilson, Sunday, 13 December
Climate normal for this date — 60-year average.
0.07Mount Wilson, Monday, 14 December
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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