As of 12:30 PDT

Weather in Foster City, CA

66°

Foster City, Monday, 26 October, 12:30

Clear. Feels like 65°. High 68°, low 51°.

Pressure30.15 inHg

Wind10.4 mph W

Humidity61%

Visibility6.2 mi

Dew point52°

See detailed hourly forecast

Monthly outlook for Foster City, CA: average high 64.5°, average low 55.2°. That is 0.7° below the climate normal for October. Precipitation is expected on 4 days (about 2.3 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 27 October (69.8°), the coolest 27 October (47.7°).

64.5°/55.2°

Average high / low

−0.7°

Below normal

4 / 3

Wet days / normal

2.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
26 October – 4 November	64.6°	66.9°	-1.3°
5 November – 14 November	64.3°	63.5°	+0.4°
15 November – 24 November	at normal	60.8°	—

October records over 66 years

97.9°5 October 1987All-time high

40.6°29 October 1971All-time low

Tue, 2770° / 48°

70 °

Foster City, Tuesday, 27 October

Overcast. High 70°, low 48°.

Pressure30.09 inHg

Wind11.2 mph W

Humidity62%

Visibility6.2 mi

Dew point47°

Wed, 2864° / 54°

64 °

Foster City, Wednesday, 28 October

Overcast. High 64°, low 54°.

Pressure30.03 inHg

Wind2.6 mph SW

Humidity77%

Visibility—

Dew point49°

Thu, 2965° / 55°

65 °

Foster City, Thursday, 29 October

Overcast. High 65°, low 55°.

Pressure29.91 inHg

Wind2.6 mph NE

Humidity73%

Visibility6.2 mi

Dew point52°

Fri, 3062° / 55°

62 °

Foster City, Friday, 30 October

Clear. High 62°, low 55°.

Pressure29.91 inHg

Wind5.3 mph W

Humidity57%

Visibility6.2 mi

Dew point45°

Sat, 3160° / 57°

60 °

Foster City, Saturday, 31 October

Partly cloudy. High 60°, low 57°.

Pressure29.97 inHg

Wind12.1 mph W

Humidity64%

Visibility—

Dew point46°

Sun, 0162° / 52°

62 °

Foster City, Sunday, 1 November

Clear. High 62°, low 52°.

Pressure29.97 inHg

Wind5.5 mph NW

Humidity34%

Visibility—

Dew point30°

Mon, 0266° / 53°

0.04

66 °

Foster City, Monday, 2 November

Light rain. High 66°, low 53°.

Pressure30.00 inHg

Wind6.5 mph E

Humidity23%

Visibility—

Dew point22°

Tue, 0365° / 56°

0.43

65 °

Foster City, Tuesday, 3 November

Rain. High 65°, low 56°.

Pressure29.91 inHg

Wind19.6 mph SW

Humidity67%

Visibility—

Dew point53°

Wed, 0464° / 57°

0.02

64 °

Foster City, Wednesday, 4 November

Light rain. High 64°, low 57°.

Pressure30.03 inHg

Wind9.3 mph SW

Humidity74%

Visibility—

Dew point54°

Thu, 0564° / 56°

64 °

Foster City, Thursday, 5 November

Overcast. High 64°, low 56°.

Pressure29.97 inHg

Wind15.2 mph S

Humidity70%

Visibility—

Dew point52°

Fri, 0667° / 63°

0.32

67 °

Foster City, Friday, 6 November

Rain. High 67°, low 63°.

Pressure29.83 inHg

Wind28 mph S

Humidity68%

Visibility—

Dew point55°

Sat, 0762° / 57°

1.49

62 °

Foster City, Saturday, 7 November

Heavy rain. High 62°, low 57°.

Pressure29.77 inHg

Wind9.7 mph W

Humidity80%

Visibility—

Dew point53°

Sun, 0862° / 55°

62 °

Foster City, Sunday, 8 November

Clear. High 62°, low 55°.

Pressure30.09 inHg

Wind8.6 mph NW

Humidity71%

Visibility—

Dew point51°

Mon, 0965° / 56°

65 °

Foster City, Monday, 9 November

Clear. High 65°, low 56°.

Pressure30.15 inHg

Wind5.5 mph NW

Humidity58%

Visibility—

Dew point46°

Tue, 1066° / 57°

66 °

Foster City, Tuesday, 10 November

Overcast. High 66°, low 57°.

Pressure30.06 inHg

Wind4.4 mph N

Humidity55%

Visibility—

Dew point46°

From day 17 onward the outlook is built from 60-year climate statistics

Wed, 1163° / 51°

0.09

63 °

Foster City, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high63°

Average low51°

Average precipitation0.09 in

Chance of precipitation27%

Record high80° (1990)

Record low40° (1985)

Thu, 1263° / 51°

0.07

63 °

Foster City, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high63°

Average low51°

Average precipitation0.07 in

Chance of precipitation17%

Record high77° (1990)

Record low42° (1985)

Fri, 1363° / 51°

0.12

63 °

Foster City, Friday, 13 November

Climate normal for this date — 60-year average.

Average high63°

Average low51°

Average precipitation0.12 in

Chance of precipitation27%

Record high76° (1995)

Record low42° (1985)

Sat, 1462° / 50°

0.06

62 °

Foster City, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high62°

Average low50°

Average precipitation0.06 in

Chance of precipitation22%

Record high76° (2008)

Record low38° (1964)

Sun, 1563° / 50°

0.07

63 °

Foster City, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high63°

Average low50°

Average precipitation0.07 in

Chance of precipitation17%

Record high76° (2008)

Record low37° (1964)

Mon, 1662° / 51°

0.1

62 °

Foster City, Monday, 16 November

Climate normal for this date — 60-year average.

Average high62°

Average low51°

Average precipitation0.1 in

Chance of precipitation25%

Record high76° (2008)

Record low38° (1964)

Tue, 1762° / 50°

0.12

62 °

Foster City, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high62°

Average low50°

Average precipitation0.12 in

Chance of precipitation28%

Record high77° (2008)

Record low39° (1964)

Wed, 1861° / 49°

0.06

61 °

Foster City, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high61°

Average low49°

Average precipitation0.06 in

Chance of precipitation22%

Record high75° (2005)

Record low38° (1994)

Thu, 1960° / 49°

0.04

60 °

Foster City, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high60°

Average low49°

Average precipitation0.04 in

Chance of precipitation25%

Record high75° (1989)

Record low38° (1977)

Fri, 2061° / 49°

0.1

61 °

Foster City, Friday, 20 November

Climate normal for this date — 60-year average.

Average high61°

Average low49°

Average precipitation0.1 in

Chance of precipitation25%

Record high73° (1989)

Record low40° (1971)

Sat, 2160° / 49°

0.08

60 °

Foster City, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high60°

Average low49°

Average precipitation0.08 in

Chance of precipitation27%

Record high71° (2005)

Record low38° (1985)

Sun, 2260° / 49°

0.08

60 °

Foster City, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high60°

Average low49°

Average precipitation0.08 in

Chance of precipitation28%

Record high71° (2005)

Record low39° (1985)

Mon, 2360° / 48°

0.05

60 °

Foster City, Monday, 23 November

Climate normal for this date — 60-year average.

Average high60°

Average low48°

Average precipitation0.05 in

Chance of precipitation17%

Record high71° (1995)

Record low39° (1993)

Tue, 2460° / 48°

0.08

60 °

Foster City, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high60°

Average low48°

Average precipitation0.08 in

Chance of precipitation18%

Record high69° (1995)

Record low36° (2010)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Foster City, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Foster City, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.