Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

38°F

3°C

Humidity	80%
Wind Speed	N 9 MPH
Barometer	NA
Dewpoint	32°F (0°C)
Visibility	NA
Wind Chill	32°F (0°C)
Last update	27 Dec 03:10 PM PST

More Information:

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

Extended Forecast for

3 Miles ESE Danville CA

Tonight
Low: 36 °F
Patchy Fog
then Patchy
Frost and
Patchy Fog
Sunday
High: 52 °F
Patchy Fog
then Sunny
Sunday Night
Low: 35 °F
Patchy Fog
then Areas
Frost and
Patchy Fog
Monday
High: 53 °F
Areas Frost
then Sunny
Monday Night
Low: 34 °F
Mostly Clear
then Patchy
Frost and
Patchy Fog
Tuesday
High: 54 °F
Areas Frost
and Patchy
Fog then
Sunny
Tuesday Night
Low: 36 °F
Patchy Fog
Wednesday
High: 54 °F
Patchy Fog
then Mostly
Cloudy
Wednesday Night
Low: 40 °F
Chance Rain
and Areas Fog

Detailed Forecast

Tonight

Patchy fog. Patchy frost after 3am. Otherwise, partly cloudy, with a low around 36. Calm wind.

Sunday

Patchy fog between 7am and 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 52. Calm wind becoming north around 5 mph in the afternoon.

Sunday Night

Patchy fog before 10pm, then patchy fog after 11pm. Areas of frost after 5am. Otherwise, mostly clear, with a low around 35. Calm wind.

Monday

Areas of frost before 8am. Otherwise, sunny, with a high near 53. Calm wind becoming northeast around 5 mph in the morning.

Monday Night

Patchy fog after 4am. Patchy frost after 1am. Otherwise, mostly clear, with a low around 34. Calm wind.

Tuesday

Patchy fog before 10am. Areas of frost before 9am. Otherwise, mostly sunny, with a high near 54.

Tuesday Night

Patchy fog before 1am, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 36.

Wednesday

Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 54.