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As of 08:47 PDT

Weather in Port Costa, CA

69°Current weather

Port Costa, Sunday, 9 August, 08:47

Clear. Feels like 69°. High 88°, low 62°.

Pressure29.88 inHg
Wind3.1 mph W
Humidity72%
Visibility6.2 mi
Dew point60°

10-day forecast for Port Costa, CA: 59° to 88°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.

88°
Best day: Sunday, August 9
72°
Worst day: Thursday, August 13

Tap any day below to see morning, afternoon, evening and overnight.

Mon, 1083° / 59°0Partly cloudy
MorningOvercast64°feels 63°
AfternoonPartly cloudy83°feels 83°
EveningClear66°feels 66°
OvernightClear61°feels 60°
83 °Partly cloudy

Port Costa, Monday, 10 August

Partly cloudy. High 83°, low 59°.

Pressure29.88 inHg
Wind10.8 mph SW
Humidity49%
Visibility6.2 mi
Dew point52°
Tue, 1177° / 60°0Clear
MorningClear62°feels 62°
AfternoonClear76°feels 76°
EveningClear65°feels 64°
OvernightClear61°feels 61°
77 °Clear

Port Costa, Tuesday, 11 August

Clear. High 77°, low 60°.

Pressure29.94 inHg
Wind8.3 mph SW
Humidity45%
Visibility6.2 mi
Dew point52°
Wed, 1274° / 60°0Clear
MorningPartly cloudy62°feels 62°
AfternoonClear74°feels 73°
EveningClear63°feels 62°
OvernightOvercast61°feels 61°
74 °Clear

Port Costa, Wednesday, 12 August

Clear. High 74°, low 60°.

Pressure29.85 inHg
Wind10.2 mph SW
Humidity51%
Visibility6.2 mi
Dew point53°
Thu, 1372° / 60°0Partly cloudy
MorningMostly clear62°feels 61°
AfternoonPartly cloudy71°feels 70°
EveningPartly cloudy63°feels 63°
OvernightPartly cloudy60°feels 60°
72 °Partly cloudy

Port Costa, Thursday, 13 August

Partly cloudy. High 72°, low 60°.

Pressure29.85 inHg
Wind15.1 mph SW
Humidity54%
Visibility—
Dew point53°
Fri, 1474° / 60°0Clear
MorningClear65°feels 65°
AfternoonClear73°feels 72°
EveningClear65°feels 64°
OvernightClear62°feels 62°
74 °Clear

Port Costa, Friday, 14 August

Clear. High 74°, low 60°.

Pressure29.91 inHg
Wind14.1 mph SW
Humidity48%
Visibility—
Dew point52°
Sat, 1575° / 60°0Clear
MorningClear65°feels 65°
AfternoonClear73°feels 73°
EveningClear65°feels 64°
OvernightClear62°feels 62°
75 °Clear

Port Costa, Saturday, 15 August

Clear. High 75°, low 60°.

Pressure30.00 inHg
Wind12.5 mph SW
Humidity47%
Visibility—
Dew point51°
Sun, 1677° / 61°0Overcast
MorningOvercast65°feels 64°
AfternoonOvercast70°feels 69°
EveningOvercast72°feels 71°
OvernightOvercast66°feels 66°
77 °Overcast

Port Costa, Sunday, 16 August

Overcast. High 77°, low 61°.

Pressure30.12 inHg
Wind7.1 mph SW
Humidity55%
Visibility—
Dew point52°
Mon, 1785° / 63°0Overcast
MorningOvercast71°feels 70°
AfternoonOvercast83°feels 82°
EveningOvercast74°feels 73°
OvernightOvercast68°feels 67°
85 °Overcast

Port Costa, Monday, 17 August

Overcast. High 85°, low 63°.

Pressure30.06 inHg
Wind8.8 mph SW
Humidity31%
Visibility—
Dew point49°
Tue, 1883° / 64°0Clear
MorningClear70°feels 70°
AfternoonClear82°feels 80°
EveningClear74°feels 73°
OvernightClear68°feels 68°
83 °Clear

Port Costa, Tuesday, 18 August

Clear. High 83°, low 64°.

Pressure30.00 inHg
Wind8.8 mph SW
Humidity34%
Visibility—
Dew point50°

About this forecast

How reliable is a 10-day forecast?

The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.

What does the time-of-day table show?

Temperature in Port Costa, CA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.

How is the best day chosen?

We weigh the daytime high against precipitation: a warm, dry day scores highest.