Monthly outlook for Castro Valley, CA: average high 61.7°, average low 48.6°. That is 0.1° below the climate normal for November. Precipitation is expected on 7 days (about 3.3 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 11 November (75°), the coolest 17 November (41.8°).
61.7°/48.6°
Average high / low
−0.1°
Below normal
7 / 4
Wet days / normal
3.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 November – 20 November
62.9°
62.8°
+0.1°
21 November – 30 November
59.6°
59.7°
-0.1°
1 December – 10 December
at normal
58.4°
—
November records over 66 years
83.5°2 November 1967All-time high
35.1°28 November 2020All-time low
Climate normals and records are computed from the nearest reference point — Cherryland (3 mi).
Thu, 1274° / 49°0
74 °
Castro Valley, Thursday, 12 November
Mostly clear. High 74°, low 49°.
Pressure29.83 inHg
Wind7 mph SW
Humidity58%
Visibility6.2 mi
Dew point54°
Fri, 1361° / 50°0.69
61 °
Castro Valley, Friday, 13 November
Heavy rain. High 61°, low 50°.
Pressure29.65 inHg
Wind14 mph S
Humidity94%
Visibility1.4 mi
Dew point54°
Sat, 1463° / 47°0
63 °
Castro Valley, Saturday, 14 November
Clear. High 63°, low 47°.
Pressure29.97 inHg
Wind3.6 mph SW
Humidity65%
Visibility6.2 mi
Dew point50°
Sun, 1560° / 51°0.39
60 °
Castro Valley, Sunday, 15 November
Rain. High 60°, low 51°.
Pressure30.00 inHg
Wind9.4 mph S
Humidity84%
Visibility6.2 mi
Dew point54°
Mon, 1660° / 47°0
60 °
Castro Valley, Monday, 16 November
Clear. High 60°, low 47°.
Pressure30.18 inHg
Wind7.7 mph W
Humidity64%
Visibility—
Dew point43°
Tue, 1760° / 42°0
60 °
Castro Valley, Tuesday, 17 November
Partly cloudy. High 60°, low 42°.
Pressure30.09 inHg
Wind7.8 mph W
Humidity64%
Visibility—
Dew point42°
Wed, 1859° / 48°0.42
59 °
Castro Valley, Wednesday, 18 November
Rain. High 59°, low 48°.
Pressure30.03 inHg
Wind9 mph SE
Humidity66%
Visibility—
Dew point44°
Thu, 1959° / 51°0.67
59 °
Castro Valley, Thursday, 19 November
Rain. High 59°, low 51°.
Pressure29.91 inHg
Wind15 mph SW
Humidity76%
Visibility—
Dew point48°
Fri, 2057° / 52°0.93
57 °
Castro Valley, Friday, 20 November
Rain. High 57°, low 52°.
Pressure29.88 inHg
Wind18.1 mph SE
Humidity82%
Visibility—
Dew point49°
Sat, 2159° / 50°0.07
59 °
Castro Valley, Saturday, 21 November
Light rain. High 59°, low 50°.
Pressure30.09 inHg
Wind5.5 mph S
Humidity69%
Visibility—
Dew point46°
Sun, 2260° / 46°0
60 °
Castro Valley, Sunday, 22 November
Overcast. High 60°, low 46°.
Pressure30.18 inHg
Wind4 mph N
Humidity63%
Visibility—
Dew point41°
Mon, 2361° / 46°0
61 °
Castro Valley, Monday, 23 November
Clear. High 61°, low 46°.
Pressure30.18 inHg
Wind3.6 mph NE
Humidity59%
Visibility—
Dew point40°
Tue, 2462° / 46°0
62 °
Castro Valley, Tuesday, 24 November
Mostly clear. High 62°, low 46°.
Pressure30.09 inHg
Wind3.2 mph NE
Humidity51%
Visibility—
Dew point36°
Wed, 2555° / 52°0.07
55 °
Castro Valley, Wednesday, 25 November
Light rain. High 55°, low 52°.
Pressure30.09 inHg
Wind4.4 mph SE
Humidity76%
Visibility—
Dew point46°
Thu, 2661° / 50°0.03
61 °
Castro Valley, Thursday, 26 November
Light rain. High 61°, low 50°.
Pressure30.21 inHg
Wind4.5 mph SE
Humidity68%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2759° / 45°0.07
59 °
Castro Valley, Friday, 27 November
Climate normal for this date — 60-year average.
Average high59°
Average low45°
Average precipitation0.07 in
Chance of precipitation22%
Record high72° (1986)
Record low36° (2023)
Sat, 2859° / 44°0.11
59 °
Castro Valley, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.11 in
Chance of precipitation23%
Record high69° (1980)
Record low35° (2020)
Sun, 2959° / 45°0.12
59 °
Castro Valley, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high59°
Average low45°
Average precipitation0.12 in
Chance of precipitation25%
Record high71° (1995)
Record low36° (2022)
Mon, 3058° / 44°0.15
58 °
Castro Valley, Monday, 30 November
Climate normal for this date — 60-year average.
Average high58°
Average low44°
Average precipitation0.15 in
Chance of precipitation25%
Record high69° (1977)
Record low37° (2015)
Tue, 0159° / 45°0.1
59 °
Castro Valley, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high59°
Average low45°
Average precipitation0.1 in
Chance of precipitation27%
Record high70° (2021)
Record low37° (2007)
Wed, 0259° / 44°0.16
59 °
Castro Valley, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.16 in
Chance of precipitation25%
Record high67° (1986)
Record low31° (2022)
Thu, 0359° / 45°0.11
59 °
Castro Valley, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high59°
Average low45°
Average precipitation0.11 in
Chance of precipitation28%
Record high71° (1979)
Record low37° (1968)
Fri, 0459° / 45°0.07
59 °
Castro Valley, Friday, 4 December
Climate normal for this date — 60-year average.
Average high59°
Average low45°
Average precipitation0.07 in
Chance of precipitation23%
Record high69° (1979)
Record low37° (2013)
Sat, 0558° / 46°0.07
58 °
Castro Valley, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.07 in
Chance of precipitation25%
Record high66° (2014)
Record low36° (1972)
Sun, 0658° / 45°0.07
58 °
Castro Valley, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high58°
Average low45°
Average precipitation0.07 in
Chance of precipitation30%
Record high68° (1962)
Record low35° (1978)
Mon, 0758° / 44°0.08
58 °
Castro Valley, Monday, 7 December
Climate normal for this date — 60-year average.
Average high58°
Average low44°
Average precipitation0.08 in
Chance of precipitation28%
Record high70° (2020)
Record low33° (1978)
Tue, 0858° / 44°0.06
58 °
Castro Valley, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high58°
Average low44°
Average precipitation0.06 in
Chance of precipitation18%
Record high69° (2020)
Record low31° (1972)
Wed, 0958° / 44°0.06
58 °
Castro Valley, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high58°
Average low44°
Average precipitation0.06 in
Chance of precipitation27%
Record high69° (1990)
Record low25° (1972)
Thu, 1057° / 44°0.1
57 °
Castro Valley, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.1 in
Chance of precipitation25%
Record high64° (1962)
Record low28° (1972)
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.