Weather in Castro Valley, CA
Castro Valley, Tuesday, 10 November, 00:43
Fog. Feels like 55°. High 76°, low 50°.
Monthly outlook for Castro Valley, CA: average high 65.7°, average low 50.3°. That is 2° above the climate normal for November. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 10 November (76.3°), the coolest 19 November (47.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 November – 19 November | 65.3° | 63° | +1.3° |
| 20 November – 29 November | 66.2° | 60° | +3.4° |
| 30 November – 9 December | at normal | 58.5° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Cherryland (3 mi).
0
Castro Valley, Wednesday, 11 November
Clear. High 75°, low 48°.
0
Castro Valley, Thursday, 12 November
Partly cloudy. High 74°, low 49°.
0.26
Castro Valley, Friday, 13 November
Light rain. High 67°, low 57°.
0
Castro Valley, Saturday, 14 November
Overcast. High 63°, low 50°.
0.27Castro Valley, Sunday, 15 November
Rain. High 58°, low 50°.
0.8Castro Valley, Monday, 16 November
Heavy rain. High 61°, low 53°.
0.06Castro Valley, Tuesday, 17 November
Light rain. High 59°, low 48°.
0.01Castro Valley, Wednesday, 18 November
Light rain. High 58°, low 48°.
0Castro Valley, Thursday, 19 November
Clear. High 62°, low 47°.
0Castro Valley, Friday, 20 November
Clear. High 65°, low 49°.
0Castro Valley, Saturday, 21 November
Partly cloudy. High 66°, low 49°.
0Castro Valley, Sunday, 22 November
Overcast. High 66°, low 51°.
0Castro Valley, Monday, 23 November
Overcast. High 65°, low 52°.
0Castro Valley, Tuesday, 24 November
Overcast. High 68°, low 52°.
0Castro Valley, Wednesday, 25 November
Overcast. High 68°, low 52°.
0.06Castro Valley, Thursday, 26 November
Climate normal for this date — 60-year average.
0.07Castro Valley, Friday, 27 November
Climate normal for this date — 60-year average.
0.11Castro Valley, Saturday, 28 November
Climate normal for this date — 60-year average.
0.12Castro Valley, Sunday, 29 November
Climate normal for this date — 60-year average.
0.15Castro Valley, Monday, 30 November
Climate normal for this date — 60-year average.
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.
0.06
Castro 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.
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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