Current Conditions

Castro Valley, California

56°F13°C

Clear

Clear. Temperatures will hold near 56°F.Clear. Temperatures will hold near 13°C.

Wind

ESE 4 mph7 km/h

Humidity

76%

Cloud Cover

As of Wednesday, November 11, 2026 at 11:25 PM PST

Today's Outlook

Night

Clear. Temperatures will range from 51°F to 71°F.Clear. Temperatures will range from 11°C to 22°C.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 73°F23°C	Low 56°F13°C	Precip 0 in0 mm—	Cloud 1%	Wind E 4 mph6 km/h	Clear. Temperatures will range from 51°F to 71°F.Clear. Temperatures will range from 11°C to 22°C.
Breeze	High 67°F20°C	Low 51°F10°C	Precip 0 in0 mm—	Cloud 44%	Wind S 5 mph9 km/h	A breeze from the SW at 7 mph. Temperatures will range from 54°F to 67°F. Partly cloudy.A breeze from the SW at 11 km/h. Temperatures will range from 12°C to 19°C. Partly cloudy.There is a medium chance of drizzle before dawn. Temperatures will range from 58°F to 67°F. Mostly clear, with a breeze from the S at 8–10 mph.There is a medium chance of drizzle before dawn. Temperatures will range from 14°C to 19°C. Mostly clear, with a breeze from the S at 13–16 km/h.
Rain	High 60°F15°C	Low 53°F12°C	Precip 0.59 in14.9 mm100%	Cloud 64%	Wind SSW 9 mph15 km/h	Rain is expected around midday. Temperatures will hold near 59°F. Cloudy, with a strong breeze from the S at 14 mph.Rain is expected around midday. Temperatures will hold near 15°C. Cloudy, with a strong breeze from the S at 23 km/h.There is a low chance of brief drizzle in the afternoon. Temperatures will range from 49°F to 58°F. Partly cloudy, with a breeze from the WSW at 8–9 mph.There is a low chance of brief drizzle in the afternoon. Temperatures will range from 9°C to 14°C. Partly cloudy, with a breeze from the WSW at 13–14 km/h.
Mostly cloudy	High 63°F17°C	Low 49°F10°C	Precip 0 in0.1 mm3%	Cloud 60%	Wind S 5 mph9 km/h	Partly cloudy. Temperatures will range from 51°F to 63°F.Partly cloudy. Temperatures will range from 11°C to 17°C.A breeze from the SSE at 7–8 mph, and there is a marginal chance of drizzle before dawn. Temperatures will range from 53°F to 63°F. Mostly cloudy.A breeze from the SSE at 11–13 km/h, and there is a marginal chance of drizzle before dawn. Temperatures will range from 12°C to 17°C. Mostly cloudy.
Low chance of showers	High 58°F15°C	Low 53°F12°C	Precip 0.35 in8.8 mm91%	Cloud 91%	Wind S 7 mph11 km/h	Light rain is expected throughout the day. Temperatures will range from 54°F to 58°F. Cloudy, with a breeze from the S at 8–9 mph.Light rain is expected throughout the day. Temperatures will range from 12°C to 14°C. Cloudy, with a breeze from the S at 13–14 km/h.There is a low chance of showers overnight. Temperatures will range from 51°F to 58°F. Partly cloudy.There is a low chance of showers overnight. Temperatures will range from 11°C to 14°C. Partly cloudy.
Low chance of showers	High 58°F15°C	Low 49°F10°C	Precip 0.04 in0.9 mm26%	Cloud 30%	Wind WNW 7 mph11 km/h	A breeze from the WNW at 7–8 mph, and there is a marginal chance of drizzle in the morning. Temperatures will range from 51°F to 58°F. Mostly clear.A breeze from the WNW at 11–13 km/h, and there is a marginal chance of drizzle in the morning. Temperatures will range from 11°C to 14°C. Mostly clear.A breeze from the WNW at 7–8 mph. Temperatures will range from 46°F to 58°F. Clear.A breeze from the WNW at 11–13 km/h. Temperatures will range from 8°C to 14°C. Clear.
Medium chance of light rain	High 59°F15°C	Low 46°F8°CFeels 43°F6°C	Precip 0.01 in0.3 mm10%	Cloud 37%	Wind SW 6 mph9 km/h	Mostly clear. Temperatures will range from 47°F to 59°F.Mostly clear. Temperatures will range from 8°C to 15°C.Light rain is expected for much of the night. Temperatures will range from 51°F to 59°F. Cloudy, with a breeze from the SSE at 9–10 mph.Light rain is expected for much of the night. Temperatures will range from 11°C to 15°C. Cloudy, with a breeze from the SSE at 14–16 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdayNov 11	73°F23°C	56°F13°C	0 in0 mm· —	1%	Clear	E 4 mph6 km/h
NightClear. Temperatures will range from 51°F to 71°F.Clear. Temperatures will range from 11°C to 22°C.
	ThursdayNov 12	67°F20°C	51°F10°C	0 in0 mm· —	44%	Breeze	S 5 mph9 km/h
DayA breeze from the SW at 7 mph. Temperatures will range from 54°F to 67°F. Partly cloudy.A breeze from the SW at 11 km/h. Temperatures will range from 12°C to 19°C. Partly cloudy. NightThere is a medium chance of drizzle before dawn. Temperatures will range from 58°F to 67°F. Mostly clear, with a breeze from the S at 8–10 mph.There is a medium chance of drizzle before dawn. Temperatures will range from 14°C to 19°C. Mostly clear, with a breeze from the S at 13–16 km/h.
	FridayNov 13	60°F15°C	53°F12°C	0.59 in14.9 mm· 100%	64%	Rain	SSW 9 mph15 km/h
DayRain is expected around midday. Temperatures will hold near 59°F. Cloudy, with a strong breeze from the S at 14 mph.Rain is expected around midday. Temperatures will hold near 15°C. Cloudy, with a strong breeze from the S at 23 km/h. NightThere is a low chance of brief drizzle in the afternoon. Temperatures will range from 49°F to 58°F. Partly cloudy, with a breeze from the WSW at 8–9 mph.There is a low chance of brief drizzle in the afternoon. Temperatures will range from 9°C to 14°C. Partly cloudy, with a breeze from the WSW at 13–14 km/h.
	SaturdayNov 14	63°F17°C	49°F10°C	0 in0.1 mm· 3%	60%	Mostly cloudy	S 5 mph9 km/h
DayPartly cloudy. Temperatures will range from 51°F to 63°F.Partly cloudy. Temperatures will range from 11°C to 17°C. NightA breeze from the SSE at 7–8 mph, and there is a marginal chance of drizzle before dawn. Temperatures will range from 53°F to 63°F. Mostly cloudy.A breeze from the SSE at 11–13 km/h, and there is a marginal chance of drizzle before dawn. Temperatures will range from 12°C to 17°C. Mostly cloudy.
	SundayNov 15	58°F15°C	53°F12°C	0.35 in8.8 mm· 91%	91%	Low chance of showers	S 7 mph11 km/h
DayLight rain is expected throughout the day. Temperatures will range from 54°F to 58°F. Cloudy, with a breeze from the S at 8–9 mph.Light rain is expected throughout the day. Temperatures will range from 12°C to 14°C. Cloudy, with a breeze from the S at 13–14 km/h. NightThere is a low chance of showers overnight. Temperatures will range from 51°F to 58°F. Partly cloudy.There is a low chance of showers overnight. Temperatures will range from 11°C to 14°C. Partly cloudy.
	MondayNov 16	58°F15°C	49°F10°C	0.04 in0.9 mm· 26%	30%	Low chance of showers	WNW 7 mph11 km/h
DayA breeze from the WNW at 7–8 mph, and there is a marginal chance of drizzle in the morning. Temperatures will range from 51°F to 58°F. Mostly clear.A breeze from the WNW at 11–13 km/h, and there is a marginal chance of drizzle in the morning. Temperatures will range from 11°C to 14°C. Mostly clear. NightA breeze from the WNW at 7–8 mph. Temperatures will range from 46°F to 58°F. Clear.A breeze from the WNW at 11–13 km/h. Temperatures will range from 8°C to 14°C. Clear.
	TuesdayNov 17	59°F15°C	46°F8°C Feels 43°F6°C	0.01 in0.3 mm· 10%	37%	Medium chance of light rain	SW 6 mph9 km/h
DayMostly clear. Temperatures will range from 47°F to 59°F.Mostly clear. Temperatures will range from 8°C to 15°C. NightLight rain is expected for much of the night. Temperatures will range from 51°F to 59°F. Cloudy, with a breeze from the SSE at 9–10 mph.Light rain is expected for much of the night. Temperatures will range from 11°C to 15°C. Cloudy, with a breeze from the SSE at 14–16 km/h.
	WednesdayNov 18	55°F13°C	51°F10°C	1.11 in28.1 mm· 87%	86%	Light rain	S 9 mph14 km/h
DayLight rain is expected throughout the day. Temperatures will range from 51°F to 55°F. Cloudy, with a breeze from the SSW at 9–10 mph.Light rain is expected throughout the day. Temperatures will range from 11°C to 13°C. Cloudy, with a breeze from the SSW at 14–16 km/h. NightLight rain is likely throughout the night. Temperatures will range from 50°F to 55°F. Mostly cloudy, with a breeze from the S at 8 mph.Light rain is likely throughout the night. Temperatures will range from 10°C to 13°C. Mostly cloudy, with a breeze from the S at 13 km/h.
	ThursdayNov 19	55°F13°C	50°F10°C Feels 47°F8°C	0.6 in15.3 mm· 64%	66%	Medium chance of showers	SSW 7 mph12 km/h
DayThere is a medium chance of showers throughout the day. Temperatures will range from 50°F to 55°F. Mostly cloudy, with a breeze from the SSW at 8 mph.There is a medium chance of showers throughout the day. Temperatures will range from 10°C to 13°C. Mostly cloudy, with a breeze from the SSW at 13 km/h. NightThere is a medium chance of showers for much of the night. Temperatures will range from 47°F to 55°F. Partly cloudy, with a breeze from the SW at 7 mph.There is a medium chance of showers for much of the night. Temperatures will range from 8°C to 13°C. Partly cloudy, with a breeze from the SW at 11 km/h.
	FridayNov 20	57°F14°C	47°F8°C	0.06 in1.4 mm· 25%	42%	Low chance of showers	SSE 5 mph9 km/h
DayPartly cloudy. Temperatures will range from 48°F to 57°F. There is a marginal chance of showers around midday.Partly cloudy. Temperatures will range from 9°C to 14°C. There is a marginal chance of showers around midday. NightPartly cloudy. Temperatures will range from 45°F to 57°F. There is a marginal chance of light rain before dawn.Partly cloudy. Temperatures will range from 7°C to 14°C. There is a marginal chance of light rain before dawn.
	SaturdayNov 21	57°F14°C	45°F7°C Feels 42°F6°C	0.1 in2.6 mm· 24%	66%	Low chance of light rain	ESE 6 mph10 km/h
DayThere is a low chance of light rain in the afternoon. Temperatures will range from 46°F to 57°F. Mostly cloudy.There is a low chance of light rain in the afternoon. Temperatures will range from 8°C to 14°C. Mostly cloudy. NightThere is a low chance of light rain throughout the night. Temperatures will range from 49°F to 57°F. Mostly cloudy.There is a low chance of light rain throughout the night. Temperatures will range from 9°C to 14°C. Mostly cloudy.
	SundayNov 22	57°F14°C	49°F9°C Feels 46°F8°C	0.31 in7.9 mm· 41%	77%	Medium chance of light rain	SE 6 mph10 km/h
DayThere is a medium chance of light rain throughout the day. Temperatures will range from 49°F to 57°F. Mostly cloudy.There is a medium chance of light rain throughout the day. Temperatures will range from 9°C to 14°C. Mostly cloudy. NightThere is a medium chance of light rain throughout the night. Temperatures will range from 50°F to 56°F. Mostly cloudy.There is a medium chance of light rain throughout the night. Temperatures will range from 10°C to 13°C. Mostly cloudy.
	MondayNov 23	58°F15°C	50°F10°C	0.35 in8.9 mm· 44%	79%	Medium chance of light rain	SE 6 mph9 km/h
DayThere is a medium chance of light rain throughout the day. Temperatures will range from 51°F to 58°F. Mostly cloudy.There is a medium chance of light rain throughout the day. Temperatures will range from 11°C to 14°C. Mostly cloudy. NightThere is a low chance of light rain throughout the night. Temperatures will range from 51°F to 58°F. Mostly cloudy.There is a low chance of light rain throughout the night. Temperatures will range from 11°C to 14°C. Mostly cloudy.
	TuesdayNov 24	59°F15°C	51°F11°C	0.28 in7.2 mm· 35%	78%	Medium chance of light rain	SSE 6 mph9 km/h
DayThere is a medium chance of light rain throughout the day. Temperatures will range from 51°F to 59°F. Mostly cloudy.There is a medium chance of light rain throughout the day. Temperatures will range from 11°C to 15°C. Mostly cloudy. NightThere is a low chance of light rain throughout the night. Temperatures will range from 51°F to 58°F. Mostly cloudy.There is a low chance of light rain throughout the night. Temperatures will range from 11°C to 14°C. Mostly cloudy.
	WednesdayNov 25	60°F15°C	51°F11°C	0.24 in6.2 mm· 32%	71%	Low chance of showers	SSE 6 mph9 km/h
DayThere is a low chance of showers for much of the day. Temperatures will range from 52°F to 60°F. Mostly cloudy.There is a low chance of showers for much of the day. Temperatures will range from 11°C to 16°C. Mostly cloudy. NightThere is a low chance of showers for much of the night. Temperatures will range from 51°F to 59°F. Mostly cloudy.There is a low chance of showers for much of the night. Temperatures will range from 11°C to 15°C. Mostly cloudy.

Nearby Cities

Ashland2 mi2 km Hayward2 mi3 km San Lorenzo3 mi5 km San Leandro4 mi7 km Union City8 mi12 km Dublin8 mi13 km

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Coordinates: 37.6941°N, 122.0863°W·Elevation: 50m·Timezone: America/Los_Angeles·Population: 61,388