

High temperatures remain relatively stable through the week, ranging from 65°F to 77°F. Mostly dry conditions with only one day showing rain chances.
This week's forecast shows temperatures running 5°F above the historical average for November. Normal highs for this period are around 65°F with lows around 45°F.
1848 - When Joseph Henry came to the Smithsonian, one of his priorities was to set up a meteorological program. In 1847, while outlining his plan for the new institution, Henry called for "a system of extended meteorological observations for solving American storms." On November 1st, 1848, Joseph Henry and Navy meteorologist James Espy wrote a letter urging anyone interested in becoming a weather observer to signify their willingness to do so. By 1849, he had budgeted $1,000 for the Smithsonian meteorological project and established a network of some 150 volunteer weather observers. A decade later, the project had more than 600 volunteer observers, including people in Canada, Mexico, Latin America, and the Caribbean. Its cost in 1860 was $4,400, or thirty percent of the Smithsonian's research and publication budget.
More on this and other weather history
Night: Mostly clear, with a low around 54. West southwest wind around 9 mph.
Day: Sunny. High near 77, with temperatures falling to around 71 in the afternoon. West wind 3 to 8 mph.
Night: Mostly clear, with a low around 51. West southwest wind 8 to 12 mph.
Day: Sunny, with a high near 69. West southwest wind 12 to 15 mph, with gusts as high as 18 mph.
Night: Mostly cloudy, with a low around 54. West southwest wind 6 to 15 mph, with gusts as high as 18 mph.
Day: Partly sunny, with a high near 71.
Night: A chance of rain between 10pm and 4am, then showers and thunderstorms. Mostly cloudy, with a low around 58.
Day: Showers and thunderstorms before 10am, then rain. Mostly cloudy, with a high near 65.
Night: A chance of rain before 10pm. Mostly cloudy, with a low around 55.
Day: Mostly sunny, with a high near 68.
Night: A slight chance of rain between 10pm and 4am. Partly cloudy, with a low around 54.
Day: Mostly sunny, with a high near 70.
Night: Partly cloudy, with a low around 52.
Day: Mostly sunny, with a high near 70.
Crockett
(2.3 miles away)
Benicia
(2.9 miles away)
Martinez-Amorco Pier
(3.3 miles away)
Sat's High Temperature
97 at 6 Miles West-southwest Of Glamis, CA
Sat's Low Temperature
7 at Walden, CO

Port Costa is a small town and census-designated place (CDP) in Contra Costa County, California, located in the East Bay region of the San Francisco Bay Area. Situated on the southern shore of the Carquinez Strait, the population was 190 in 2020 according to the United States Census Bureau.
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Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.
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