Weather in Castro Valley, CA
Castro Valley, Sunday, 15 November, 02:57
Mostly clear. Feels like 51°. High 64°, low 52°.
Monthly outlook for Castro Valley, CA: average high 60.9°, average low 49°. That is 0.1° above the climate normal for November. Precipitation is expected on 6 days (about 4.2 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 29 November (65.6°), the coolest 17 November (38.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 59.5° | 61.5° | -1.1° |
| 25 November – 4 December | 63.2° | 59.1° | +2.3° |
| 5 December – 14 December | at normal | 57.3° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Cherryland (3 mi).
0.05
Castro Valley, Monday, 16 November
Light rain. High 60°, low 48°.
0
Castro Valley, Tuesday, 17 November
Overcast. High 59°, low 39°.
1.27Castro Valley, Wednesday, 18 November
Heavy rain. High 59°, low 51°.
0.78Castro Valley, Thursday, 19 November
Rain. High 51°, low 48°.
0.03Castro Valley, Friday, 20 November
Light rain. High 58°, low 46°.
0Castro Valley, Saturday, 21 November
Overcast. High 60°, low 50°.
0.03Castro Valley, Sunday, 22 November
Light rain. High 57°, low 50°.
0Castro Valley, Monday, 23 November
Overcast. High 64°, low 51°.
0.15Castro Valley, Tuesday, 24 November
Rain. High 63°, low 57°.
1.64Castro Valley, Wednesday, 25 November
Heavy rain. High 61°, low 53°.
0
Castro Valley, Thursday, 26 November
Clear. High 62°, low 49°.
0
Castro Valley, Friday, 27 November
Mostly clear. High 63°, low 47°.
0
Castro Valley, Saturday, 28 November
Partly cloudy. High 63°, low 46°.
0Castro Valley, Sunday, 29 November
Overcast. High 66°, low 49°.
0Castro Valley, Monday, 30 November
Clear. High 65°, low 49°.
0.1Castro Valley, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.16Castro Valley, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.11Castro Valley, Thursday, 3 December
Climate normal for this date — 60-year average.
0.07Castro Valley, Friday, 4 December
Climate normal for this date — 60-year average.
0.07Castro Valley, Saturday, 5 December
Climate normal for this date — 60-year average.
0.07Castro Valley, Sunday, 6 December
Climate normal for this date — 60-year average.
0.08Castro Valley, Monday, 7 December
Climate normal for this date — 60-year average.
0.06Castro Valley, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.06Castro Valley, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.1Castro Valley, Thursday, 10 December
Climate normal for this date — 60-year average.
0.13Castro Valley, Friday, 11 December
Climate normal for this date — 60-year average.
0.12Castro Valley, Saturday, 12 December
Climate normal for this date — 60-year average.
0.09Castro Valley, Sunday, 13 December
Climate normal for this date — 60-year average.
0.14Castro Valley, 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 Castro 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 Castro 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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