As of 20:13 PDT

Weather in Foster City, CA

57°

Foster City, Saturday, 31 October, 20:13

Clear. Feels like 56°. High 65°, low 50°.

Pressure29.83 inHg

Wind8.1 mph NW

Humidity76%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Monthly outlook for Foster City, CA: average high 65.1°, average low 54.9°. That is 0.3° above the climate normal for October. Precipitation is expected on 5 days (about 3.0 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 7 November (69.8°), the coolest 2 November (46.1°).

65.1°/54.9°

Average high / low

+0.3°

Above normal

5 / 3

Wet days / normal

3.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
31 October – 9 November	65.9°	65.6°	+0.2°
10 November – 19 November	63.7°	62.2°	+0.9°
20 November – 29 November	at normal	59.6°	—

October records over 66 years

97.9°5 October 1987All-time high

40.6°29 October 1971All-time low

Sun, 0166° / 48°

0.06

66 °

Foster City, Sunday, 1 November

Light rain. High 66°, low 48°.

Pressure29.97 inHg

Wind6.6 mph NW

Humidity61%

Visibility6.2 mi

Dew point45°

Mon, 0264° / 46°

64 °

Foster City, Monday, 2 November

Overcast. High 64°, low 46°.

Pressure30.18 inHg

Wind4 mph NE

Humidity74%

Visibility0.5 mi

Dew point52°

Tue, 0365° / 58°

0.2

65 °

Foster City, Tuesday, 3 November

Rain. High 65°, low 58°.

Pressure30.06 inHg

Wind7 mph SE

Humidity81%

Visibility6.2 mi

Dew point54°

Wed, 0464° / 56°

64 °

Foster City, Wednesday, 4 November

Clear. High 64°, low 56°.

Pressure30.09 inHg

Wind0.3 mph W

Humidity72%

Visibility6.2 mi

Dew point50°

Thu, 0566° / 57°

66 °

Foster City, Thursday, 5 November

Partly cloudy. High 66°, low 57°.

Pressure30.09 inHg

Wind6.8 mph W

Humidity86%

Visibility—

Dew point55°

Fri, 0666° / 58°

66 °

Foster City, Friday, 6 November

Overcast. High 66°, low 58°.

Pressure30.15 inHg

Wind6 mph S

Humidity73%

Visibility—

Dew point53°

Sat, 0770° / 58°

70 °

Foster City, Saturday, 7 November

Clear. High 70°, low 58°.

Pressure30.06 inHg

Wind5.4 mph SE

Humidity39%

Visibility—

Dew point40°

Sun, 0867° / 57°

67 °

Foster City, Sunday, 8 November

Overcast. High 67°, low 57°.

Pressure30.00 inHg

Wind6.4 mph NW

Humidity42%

Visibility—

Dew point41°

Mon, 0966° / 57°

66 °

Foster City, Monday, 9 November

Overcast. High 66°, low 57°.

Pressure30.00 inHg

Wind5 mph NW

Humidity77%

Visibility—

Dew point55°

Tue, 1068° / 57°

68 °

Foster City, Tuesday, 10 November

Clear. High 68°, low 57°.

Pressure30.09 inHg

Wind6.8 mph W

Humidity69%

Visibility—

Dew point53°

Wed, 1165° / 57°

0.13

65 °

Foster City, Wednesday, 11 November

Light rain. High 65°, low 57°.

Pressure30.12 inHg

Wind11.5 mph S

Humidity91%

Visibility—

Dew point58°

Thu, 1266° / 56°

66 °

Foster City, Thursday, 12 November

Overcast. High 66°, low 56°.

Pressure30.09 inHg

Wind7.5 mph S

Humidity55%

Visibility—

Dew point46°

Fri, 1366° / 57°

0.41

66 °

Foster City, Friday, 13 November

Rain. High 66°, low 57°.

Pressure29.85 inHg

Wind21.2 mph S

Humidity73%

Visibility—

Dew point55°

Sat, 1457° / 55°

2.19

57 °

Foster City, Saturday, 14 November

Heavy rain. High 57°, low 55°.

Pressure29.74 inHg

Wind12.8 mph E

Humidity91%

Visibility—

Dew point53°

Sun, 1560° / 53°

0.01

60 °

Foster City, Sunday, 15 November

Light rain. High 60°, low 53°.

Pressure29.88 inHg

Wind9.4 mph W

Humidity75%

Visibility—

Dew point49°

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

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)

Wed, 2560° / 48°

0.06

60 °

Foster City, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high60°

Average low48°

Average precipitation0.06 in

Chance of precipitation25%

Record high71° (1975)

Record low41° (1983)

Thu, 2659° / 47°

0.08

59 °

Foster City, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high59°

Average low47°

Average precipitation0.08 in

Chance of precipitation22%

Record high70° (2014)

Record low39° (2015)

Fri, 2759° / 47°

0.07

59 °

Foster City, Friday, 27 November

Climate normal for this date — 60-year average.

Average high59°

Average low47°

Average precipitation0.07 in

Chance of precipitation20%

Record high69° (1986)

Record low38° (2015)

Sat, 2859° / 47°

0.11

59 °

Foster City, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high59°

Average low47°

Average precipitation0.11 in

Chance of precipitation20%

Record high69° (1980)

Record low38° (2015)

Sun, 2959° / 47°

0.11

59 °

Foster City, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high59°

Average low47°

Average precipitation0.11 in

Chance of precipitation25%

Record high69° (1977)

Record low38° (2006)

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.