As of 09:29 PDT

Weather in Mill Valley, CA

57°

Mill Valley, Sunday, 11 October, 09:29

Clear. Feels like 56°. High 64°, low 45°.

Pressure29.53 inHg

Wind3 mph SE

Humidity76%

Visibility6.2 mi

Dew point48°

See detailed hourly forecast

Monthly outlook for Mill Valley, CA: average high 65.1°, average low 51.2°. That is 2.4° below the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.7 inches. The warmest day looks like 16 October (79.4°), the coolest 13 October (43.6°).

65.1°/51.2°

Average high / low

−2.4°

Below normal

0 / 2

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
11 October – 20 October	67.2°	70.1°	-1.6°
21 October – 30 October	61.6°	67.4°	-3.3°
31 October – 9 November	at normal	65°	—

October records over 66 years

98.1°6 October 2024All-time high

41.2°31 October 1989All-time low

Climate normals and records are computed from the nearest reference point — Marin City (3 mi).

Mon, 1265° / 44°

65 °

Mill Valley, Monday, 12 October

Clear. High 65°, low 44°.

Pressure29.88 inHg

Wind3.7 mph S

Humidity48%

Visibility6.2 mi

Dew point43°

Tue, 1367° / 44°

67 °

Mill Valley, Tuesday, 13 October

Clear. High 67°, low 44°.

Pressure30.06 inHg

Wind5.2 mph NE

Humidity21%

Visibility6.2 mi

Dew point24°

Wed, 1469° / 44°

69 °

Mill Valley, Wednesday, 14 October

Mostly clear. High 69°, low 44°.

Pressure30.09 inHg

Wind2.6 mph S

Humidity48%

Visibility6.2 mi

Dew point48°

Thu, 1578° / 48°

78 °

Mill Valley, Thursday, 15 October

Clear. High 78°, low 48°.

Pressure30.09 inHg

Wind6.7 mph NW

Humidity30%

Visibility—

Dew point34°

Fri, 1679° / 55°

79 °

Mill Valley, Friday, 16 October

Clear. High 79°, low 55°.

Pressure30.00 inHg

Wind5 mph NW

Humidity21%

Visibility—

Dew point30°

Sat, 1768° / 58°

68 °

Mill Valley, Saturday, 17 October

Clear. High 68°, low 58°.

Pressure30.09 inHg

Wind7.1 mph W

Humidity42%

Visibility—

Dew point40°

Sun, 1862° / 54°

62 °

Mill Valley, Sunday, 18 October

Clear. High 62°, low 54°.

Pressure30.03 inHg

Wind9.5 mph W

Humidity66%

Visibility—

Dew point49°

Mon, 1960° / 51°

60 °

Mill Valley, Monday, 19 October

Mostly clear. High 60°, low 51°.

Pressure30.12 inHg

Wind16.8 mph NW

Humidity61%

Visibility—

Dew point44°

Tue, 2058° / 51°

58 °

Mill Valley, Tuesday, 20 October

Clear. High 58°, low 51°.

Pressure30.06 inHg

Wind8 mph W

Humidity64%

Visibility—

Dew point44°

Wed, 2159° / 52°

59 °

Mill Valley, Wednesday, 21 October

Clear. High 59°, low 52°.

Pressure29.97 inHg

Wind8.5 mph W

Humidity50%

Visibility—

Dew point38°

Thu, 2259° / 53°

59 °

Mill Valley, Thursday, 22 October

Clear. High 59°, low 53°.

Pressure30.00 inHg

Wind8.4 mph W

Humidity50%

Visibility—

Dew point39°

Fri, 2360° / 51°

60 °

Mill Valley, Friday, 23 October

Clear. High 60°, low 51°.

Pressure30.00 inHg

Wind7.6 mph W

Humidity44%

Visibility—

Dew point35°

Sat, 2461° / 53°

61 °

Mill Valley, Saturday, 24 October

Clear. High 61°, low 53°.

Pressure30.00 inHg

Wind6.1 mph W

Humidity45%

Visibility—

Dew point37°

Sun, 2564° / 56°

64 °

Mill Valley, Sunday, 25 October

Clear. High 64°, low 56°.

Pressure30.06 inHg

Wind6.6 mph W

Humidity38%

Visibility—

Dew point35°

Mon, 2666° / 59°

66 °

Mill Valley, Monday, 26 October

Clear. High 66°, low 59°.

Pressure29.97 inHg

Wind7.7 mph W

Humidity35%

Visibility—

Dew point34°

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

Tue, 2767° / 51°

0.03

67 °

Mill Valley, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high67°

Average low51°

Average precipitation0.03 in

Chance of precipitation7%

Record high84° (2003)

Record low43° (2010)

Wed, 2866° / 51°

0.07

66 °

Mill Valley, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high66°

Average low51°

Average precipitation0.07 in

Chance of precipitation17%

Record high82° (2003)

Record low43° (2023)

Thu, 2966° / 51°

0.06

66 °

Mill Valley, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high66°

Average low51°

Average precipitation0.06 in

Chance of precipitation22%

Record high78° (1965)

Record low43° (1971)

Fri, 3066° / 51°

0.06

66 °

Mill Valley, Friday, 30 October

Climate normal for this date — 60-year average.

Average high66°

Average low51°

Average precipitation0.06 in

Chance of precipitation17%

Record high80° (1966)

Record low42° (1971)

Sat, 3167° / 50°

0.03

67 °

Mill Valley, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high67°

Average low50°

Average precipitation0.03 in

Chance of precipitation17%

Record high81° (1966)

Record low41° (1989)

Sun, 0167° / 50°

0.06

67 °

Mill Valley, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high67°

Average low50°

Average precipitation0.06 in

Chance of precipitation15%

Record high81° (1966)

Record low41° (1984)

Mon, 0267° / 50°

0.04

67 °

Mill Valley, Monday, 2 November

Climate normal for this date — 60-year average.

Average high67°

Average low50°

Average precipitation0.04 in

Chance of precipitation13%

Record high80° (1997)

Record low42° (1974)

Tue, 0366° / 50°

0.03

66 °

Mill Valley, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high66°

Average low50°

Average precipitation0.03 in

Chance of precipitation12%

Record high80° (1976)

Record low43° (1971)

Wed, 0466° / 50°

0.03

66 °

Mill Valley, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high66°

Average low50°

Average precipitation0.03 in

Chance of precipitation10%

Record high80° (1976)

Record low42° (2003)

Thu, 0564° / 50°

0.06

64 °

Mill Valley, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high64°

Average low50°

Average precipitation0.06 in

Chance of precipitation15%

Record high77° (2020)

Record low44° (1971)

Fri, 0664° / 51°

0.07

64 °

Mill Valley, Friday, 6 November

Climate normal for this date — 60-year average.

Average high64°

Average low51°

Average precipitation0.07 in

Chance of precipitation20%

Record high77° (1976)

Record low42° (1996)

Sat, 0764° / 50°

0.09

64 °

Mill Valley, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high64°

Average low50°

Average precipitation0.09 in

Chance of precipitation25%

Record high79° (1991)

Record low42° (1971)

Sun, 0863° / 49°

0.08

63 °

Mill Valley, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high63°

Average low49°

Average precipitation0.08 in

Chance of precipitation25%

Record high75° (1976)

Record low41° (1983)

Mon, 0963° / 48°

0.09

63 °

Mill Valley, Monday, 9 November

Climate normal for this date — 60-year average.

Average high63°

Average low48°

Average precipitation0.09 in

Chance of precipitation20%

Record high73° (1976)

Record low41° (1998)

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 Mill Valley, 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 Mill Valley, 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.