Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain & Isolated Severe Thunderstorms in Southern California

Snow squalls are likely to cross the Lower Great Lakes this evening and the Ohio Valley through the interior Northeast/northern Mid-Atlantic overnight, before potentially reaching the I-95 corridor from D.C. to New York City early New Year’s Day morning. Heavy rain and isolated severe thunderstorms will impact coastal southern California including Los Angeles tonight into early on New Year's Day. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

46°F

8°C

Humidity	96%
Wind Speed	SE 19 MPH
Barometer	NA
Dewpoint	45°F (7°C)
Visibility	NA
Wind Chill	39°F (4°C)
Last update	31 Dec 01:50 PM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles SSE Clayton CA

This Afternoon
High: 52 °F
Rain
Tonight
Low: 46 °F⇑
Rain
New Year's Day
High: 51 °F
Rain Likely
Thursday Night
Low: 46 °F
Chance Rain
Friday
High: 55 °F
Rain Likely
Friday Night
Low: 52 °F
Rain and
Breezy
Saturday
High: 56 °F
Showers and
Breezy
Saturday Night
Low: 49 °F
Showers
Sunday
High: 53 °F
Rain

Detailed Forecast

This Afternoon

Rain. High near 52. East wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Tonight

Rain. Temperature rising to around 51 by 5am. East southeast wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

New Year's Day

Rain likely, mainly before 4pm. Mostly cloudy, with a high near 51. South wind 13 to 17 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night

A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 46. South wind 10 to 14 mph, with gusts as high as 23 mph. New precipitation amounts of less than a tenth of an inch possible.

Friday

Rain likely, mainly after 4pm. Mostly cloudy, with a high near 55. South wind 11 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

Rain. Low around 52. Breezy. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Saturday

Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 56. Breezy. Chance of precipitation is 100%.

Saturday Night

Showers and possibly a thunderstorm. Cloudy, with a low around 49.

Sunday

Rain. Cloudy, with a high near 53.

Sunday Night

Rain. Mostly cloudy, with a low around 48.

Monday

Rain likely. Mostly cloudy, with a high near 51.