Castro Valley (94546) Daily Weather Forecast

How Many Days Will You Need AC In Castro Valley This Summer?

The average heat index and average air temperature remained constant between 1981 and 2022, according to a new analysis.

Cal State East Bay Remains Closed Tuesday

CSU-East Bay announced the closure on its website.

Cal State East Bay Closed Monday

CSU-East Bay announced the closure on its website.

BAAQMD Extends Air Quality Advisory Through Tuesday

Tuesday will mark the fifth consecutive day of the air advisory issued due to wildfires in Northern California and Oregon.

Pollen Season Is Kicking Up Allergies And Hay Fever In Castro Valley

More grass pollen can be expected this year thanks to several atmospheric rivers.

Atmospheric River Storm Expected To Arrive in Castro Valley Overnight

Incoming storm a "direct threat to life and property," NWS says.

'Significant Accumulating Snow': NWS; Castro Valley Forecast

The snow level has fallen to 500 feet in some areas, with up to 18 inches of snow expected on peaks including Mission Peak and Mt. Diablo.

Castro Valley Goes Under Freeze Watch

The freeze watch will be in effect from at 2 a.m. to 9 a.m. Wednesday, and residents are urged to prepare, the NWS said.

Castro Valley Temperatures To Plunge Into 30s

Castro Valley temperatures are expected to top out at 54 degrees Thursday afternoon before plunging precipitously.

Flood Advisory Issued for Castro Valley, East Bay

The advisory is scheduled to end later tonight.

Most East Bay Regional Parks Closed Due To Storms, Damage

Downed trees, falling branches, flooding and mudslides create potential safety hazards, Parks District says.

Castro Valley Has 1 Day To Dry Out: Plan Ahead

After 3 days of drenching rain in the past week, Friday looks dry. But the storm door is wide open again starting Saturday.

Multiple Roads Closed In Castro Valley Area

Washouts, mudslides and flooding have taken a toll on local roads.

Residents Of Kilkare, Palomares, Niles Canyon Roads Urged To Evacuate

Residents are urged to evacuate because of the storm, saturated soils and runoff.

East Bay Regional Parks Announces Closure Of Parks Due To Storm

All parks managed by East Bay Regional Parks District are closed Wednesday and Thursday due to expected storm conditions and high winds.

Where To Find Free Sandbags In Castro Valley, Hayward

Wednesday's storm is expected to be "brutal" with flooding and high winds.

Castro Valley Goes Under Flood Watch

​Excessive runoff could flood low-lying areas, particularly in some of the creeks and rivers of Alameda County.

Atmospheric River Pummels Castro Valley; More Rain Coming

A major storm caused flooding, power outages, and high winds all over the Bay Area. More rain is expected through January.

Sierra Snowpack Records Best Start In A Decade

The statewide snowpack is about 163 percent of average for this time of year, according to the California Department of Water Resources.

Atmospheric River, Wind Advisory To Hit Castro Valley

The weather service is predicting downpours.

Rain, Near Freezing Temperatures Expected In Castro Valley

A cold front dropped temperatures on Monday. Expect rain as the week progresses.

Drought- and Heat-Stressed Castro Valley Trees Need Water

We need to conserve water, but an East Bay expert warns that trees receiving less water are more susceptible to pests and disease.

Excessive Heat Watch Issued For Castro Valley, East Bay: NWS

Temps are expected to hit triple digits in parts of the East Bay this weekend with records expected to be broken. Castro Valley forecast.

Heat Advisory In Effect Through Tuesday

The heat advisory is in effect from 11 a.m. to 8 p.m. Tuesday.

Castro Valley Under Heat Advisory

"Extreme heat will significantly increase the potential for heat-related illnesses."

Castro Valley Readies To Go Under Heat Advisory: NWS

Cooler temperatures in Castro Valley are expected to give way to warmer weather starting Thursday, the National Weather Service said.

Wind Advisory Issued For East Bay

Here's the timing for the worst of the wind.

Heat Wave To Hit Castro Valley, Bay Area

Temperatures will hover around the 90s in Castro Valley later this week as the Bay Area sees some of the hottest April weather since 1989.

Storm To Bring Rain To Bay Area, Snow To Tahoe

The week's heatwave will give way to rain in the Bay Area and snow in the local mountains in what may be the heaviest storm so far in 2022.

Chance Of Rain In Castro Valley This Weekend

The rain will be followed by a warming trend.

Thunderstorm Possible Thursday Morning: NWS

The National Weather Service issued a Special Weather Statement for parts of the East Bay, with Hayward specifically mentioned.

High Wind Watch For Castro Valley

Some parts of the Bay Area could see wind gusts up to 65 mph. See the timing, intensity of the watch.

Gusty Winds Prompt Wind Advisory In Castro Valley

"Tree limbs could be blown down and power outages may occur," the National Weather Service said.

Rain, Slick Roads Expected In Castro Valley Amid Christmas Travel

Here's how much rain the Bay Area is expected to get over the next week.

'Potent' Storm To Hit Castro Valley; Here's When Rain Could Start

See how much rain is expected in the days to come as a powerful storm barrels toward the Bay Area.

Here's When Rain, Thunder Could Come To Castro Valley Monday

An "atmospheric river" is expected to bring widespread rain as a wind advisory is in effect across most of the Bay Area.

Castro Valley Winter 2021 Forecast From NOAA

Last week's storm has many residents hoping for a drought-breaking winter. Here's what NOAA predicts.

Castro Valley Rainfall Totals

Get the latest updates, including rainfall totals, in Castro Valley after a "bomb cyclone" tore through the region.

'The Storm Door Is Officially Open' In Castro Valley: Officials

Officials warn that wet roads, traffic incidents and wind may be on the horizon as fall's first rain arrives. What to expect, Castro Valley.

Winter Weather Forecast For Castro Valley

AccuWeather says the return of a La Niña cycle could affect how much rain Castro Valley receives, and when it will finally arrive.