Monthly outlook for Larkspur, CA: average high 66°, average low 55.3°. That is 0.8° below the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 2 days and 0.9 inches. The warmest day looks like 24 October (70.7°), the coolest 20 October (47.6°).
66°/55.3°
Average high / low
−0.8°
Below normal
4 / 2
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
68°
68°
-0°
29 October – 7 November
62.6°
65.6°
-1.7°
8 November – 17 November
at normal
62.2°
—
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 (5 mi).
Tue, 2070° / 48°0.01
70 °
Larkspur, Tuesday, 20 October
Light rain. High 70°, low 48°.
Pressure29.94 inHg
Wind3.8 mph NE
Humidity62%
Visibility6.2 mi
Dew point47°
Wed, 2168° / 53°0.15
68 °
Larkspur, Wednesday, 21 October
Rain. High 68°, low 53°.
Pressure29.88 inHg
Wind1.4 mph NE
Humidity59%
Visibility6.2 mi
Dew point51°
Thu, 2267° / 51°0
67 °
Larkspur, Thursday, 22 October
Overcast. High 67°, low 51°.
Pressure29.97 inHg
Wind0.8 mph SW
Humidity67%
Visibility4.1 mi
Dew point55°
Fri, 2370° / 48°0
70 °
Larkspur, Friday, 23 October
Clear. High 70°, low 48°.
Pressure30.15 inHg
Wind6 mph NW
Humidity62%
Visibility—
Dew point48°
Sat, 2471° / 50°0
71 °
Larkspur, Saturday, 24 October
Clear. High 71°, low 50°.
Pressure30.06 inHg
Wind4.3 mph NW
Humidity37%
Visibility—
Dew point37°
Sun, 2568° / 54°0
68 °
Larkspur, Sunday, 25 October
Overcast. High 68°, low 54°.
Pressure30.12 inHg
Wind7.2 mph NW
Humidity44%
Visibility—
Dew point40°
Mon, 2667° / 61°0
67 °
Larkspur, Monday, 26 October
Overcast. High 67°, low 61°.
Pressure30.03 inHg
Wind6.1 mph NE
Humidity45%
Visibility—
Dew point42°
Tue, 2766° / 59°0
66 °
Larkspur, Tuesday, 27 October
Overcast. High 66°, low 59°.
Pressure29.94 inHg
Wind7.2 mph W
Humidity44%
Visibility—
Dew point40°
Wed, 2865° / 57°0
65 °
Larkspur, Wednesday, 28 October
Partly cloudy. High 65°, low 57°.
Pressure30.00 inHg
Wind6.9 mph W
Humidity49%
Visibility—
Dew point43°
Thu, 2964° / 59°0
64 °
Larkspur, Thursday, 29 October
Overcast. High 64°, low 59°.
Pressure29.91 inHg
Wind7.1 mph SW
Humidity62%
Visibility—
Dew point49°
Fri, 3062° / 59°0.04
62 °
Larkspur, Friday, 30 October
Light rain. High 62°, low 59°.
Pressure29.88 inHg
Wind3.5 mph S
Humidity83%
Visibility—
Dew point55°
Sat, 3165° / 59°0.01
65 °
Larkspur, Saturday, 31 October
Light rain. High 65°, low 59°.
Pressure29.88 inHg
Wind6.5 mph NE
Humidity72%
Visibility—
Dew point51°
Sun, 0161° / 58°0.89
61 °
Larkspur, Sunday, 1 November
Rain. High 61°, low 58°.
Pressure29.65 inHg
Wind18.2 mph NE
Humidity88%
Visibility—
Dew point57°
Mon, 0263° / 58°0
63 °
Larkspur, Monday, 2 November
Overcast. High 63°, low 58°.
Pressure30.24 inHg
Wind7 mph NE
Humidity85%
Visibility—
Dew point55°
Tue, 0360° / 58°0.08
60 °
Larkspur, Tuesday, 3 November
Light rain. High 60°, low 58°.
Pressure30.12 inHg
Wind8.8 mph NE
Humidity90%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0466° / 50°0.03
66 °
Larkspur, 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 °
Larkspur, 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 °
Larkspur, 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 °
Larkspur, 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 °
Larkspur, 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 °
Larkspur, 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)
Tue, 1062° / 49°0.14
62 °
Larkspur, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high62°
Average low49°
Average precipitation0.14 in
Chance of precipitation28%
Record high76° (1990)
Record low40° (1982)
Wed, 1162° / 49°0.1
62 °
Larkspur, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high62°
Average low49°
Average precipitation0.1 in
Chance of precipitation27%
Record high76° (1990)
Record low37° (2000)
Thu, 1263° / 48°0.08
63 °
Larkspur, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high63°
Average low48°
Average precipitation0.08 in
Chance of precipitation20%
Record high75° (1990)
Record low37° (1985)
Fri, 1362° / 49°0.14
62 °
Larkspur, Friday, 13 November
Climate normal for this date — 60-year average.
Average high62°
Average low49°
Average precipitation0.14 in
Chance of precipitation27%
Record high73° (1995)
Record low35° (1985)
Sat, 1462° / 48°0.06
62 °
Larkspur, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high62°
Average low48°
Average precipitation0.06 in
Chance of precipitation22%
Record high77° (2008)
Record low37° (1985)
Sun, 1562° / 49°0.09
62 °
Larkspur, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high62°
Average low49°
Average precipitation0.09 in
Chance of precipitation22%
Record high75° (2010)
Record low39° (1978)
Mon, 1661° / 49°0.12
61 °
Larkspur, Monday, 16 November
Climate normal for this date — 60-year average.
Average high61°
Average low49°
Average precipitation0.12 in
Chance of precipitation27%
Record high72° (2008)
Record low39° (2009)
Tue, 1761° / 48°0.13
61 °
Larkspur, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high61°
Average low48°
Average precipitation0.13 in
Chance of precipitation25%
Record high73° (2008)
Record low37° (2000)
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 Larkspur, 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 Larkspur, 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.