Monthly outlook for San Quentin, CA: average high 64.4°, average low 54.3°. That is 0.2° below the climate normal for October. Precipitation is expected on 3 days (about 2.3 inches), against a normal of 3 days and 1.1 inches. The warmest day looks like 28 October (70.2°), the coolest 1 November (46.1°).
64.4°/54.3°
Average high / low
−0.2°
Below normal
3 / 3
Wet days / normal
2.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
28 October – 6 November
65.1°
65.8°
-0.4°
7 November – 16 November
63.2°
62.5°
+0.4°
17 November – 26 November
at normal
59.9°
—
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).
Thu, 2966° / 49°0
66 °
San Quentin, Thursday, 29 October
Overcast. High 66°, low 49°.
Pressure29.91 inHg
Wind2.5 mph SE
Humidity63%
Visibility6.2 mi
Dew point49°
Fri, 3067° / 51°0
67 °
San Quentin, Friday, 30 October
Clear. High 67°, low 51°.
Pressure29.94 inHg
Wind0.6 mph E
Humidity49%
Visibility6.2 mi
Dew point45°
Sat, 3166° / 49°0
66 °
San Quentin, Saturday, 31 October
Overcast. High 66°, low 49°.
Pressure29.97 inHg
Wind2.2 mph S
Humidity39%
Visibility6.2 mi
Dew point38°
Sun, 0166° / 46°0
66 °
San Quentin, Sunday, 1 November
Clear. High 66°, low 46°.
Pressure30.12 inHg
Wind7.3 mph NW
Humidity47%
Visibility—
Dew point37°
Mon, 0265° / 50°0
65 °
San Quentin, Monday, 2 November
Partly cloudy. High 65°, low 50°.
Pressure30.18 inHg
Wind5.3 mph N
Humidity35%
Visibility—
Dew point32°
Tue, 0362° / 56°0.99
62 °
San Quentin, Tuesday, 3 November
Heavy rain. High 62°, low 56°.
Pressure29.85 inHg
Wind8 mph NE
Humidity53%
Visibility—
Dew point44°
Wed, 0463° / 56°0
63 °
San Quentin, Wednesday, 4 November
Clear. High 63°, low 56°.
Pressure30.00 inHg
Wind6.4 mph SW
Humidity76%
Visibility—
Dew point52°
Thu, 0563° / 57°0
63 °
San Quentin, Thursday, 5 November
Overcast. High 63°, low 57°.
Pressure30.06 inHg
Wind6.1 mph SW
Humidity80%
Visibility—
Dew point53°
Fri, 0663° / 58°0
63 °
San Quentin, Friday, 6 November
Overcast. High 63°, low 58°.
Pressure29.97 inHg
Wind16.8 mph S
Humidity75%
Visibility—
Dew point52°
Sat, 0763° / 61°0.91
63 °
San Quentin, Saturday, 7 November
Rain. High 63°, low 61°.
Pressure29.88 inHg
Wind20.7 mph S
Humidity81%
Visibility—
Dew point57°
Sun, 0863° / 59°0.39
63 °
San Quentin, Sunday, 8 November
Rain. High 63°, low 59°.
Pressure29.88 inHg
Wind21.6 mph S
Humidity87%
Visibility—
Dew point59°
Mon, 0963° / 56°0
63 °
San Quentin, Monday, 9 November
Overcast. High 63°, low 56°.
Pressure30.12 inHg
Wind7.9 mph W
Humidity76%
Visibility—
Dew point51°
Tue, 1064° / 57°0
64 °
San Quentin, Tuesday, 10 November
Mostly clear. High 64°, low 57°.
Pressure30.12 inHg
Wind4.6 mph W
Humidity66%
Visibility—
Dew point48°
Wed, 1165° / 58°0
65 °
San Quentin, Wednesday, 11 November
Clear. High 65°, low 58°.
Pressure30.15 inHg
Wind9.1 mph NE
Humidity66%
Visibility—
Dew point49°
Thu, 1261° / 59°0
61 °
San Quentin, Thursday, 12 November
Clear. High 61°, low 59°.
Pressure30.12 inHg
Wind7 mph NE
Humidity62%
Visibility—
Dew point47°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 1362° / 49°0.14
62 °
San Quentin, 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 °
San Quentin, 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 °
San Quentin, 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 °
San Quentin, 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 °
San Quentin, 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)
Wed, 1861° / 48°0.07
61 °
San Quentin, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high61°
Average low48°
Average precipitation0.07 in
Chance of precipitation20%
Record high72° (2005)
Record low37° (1964)
Thu, 1960° / 47°0.07
60 °
San Quentin, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high60°
Average low47°
Average precipitation0.07 in
Chance of precipitation27%
Record high72° (1989)
Record low35° (1985)
Fri, 2060° / 47°0.11
60 °
San Quentin, Friday, 20 November
Climate normal for this date — 60-year average.
Average high60°
Average low47°
Average precipitation0.11 in
Chance of precipitation28%
Record high71° (1989)
Record low36° (2000)
Sat, 2159° / 47°0.13
59 °
San Quentin, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high59°
Average low47°
Average precipitation0.13 in
Chance of precipitation27%
Record high69° (2005)
Record low37° (1964)
Sun, 2260° / 47°0.12
60 °
San Quentin, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high60°
Average low47°
Average precipitation0.12 in
Chance of precipitation30%
Record high69° (2005)
Record low37° (1994)
Mon, 2360° / 46°0.06
60 °
San Quentin, Monday, 23 November
Climate normal for this date — 60-year average.
Average high60°
Average low46°
Average precipitation0.06 in
Chance of precipitation22%
Record high69° (1995)
Record low37° (1994)
Tue, 2460° / 45°0.07
60 °
San Quentin, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high60°
Average low45°
Average precipitation0.07 in
Chance of precipitation17%
Record high69° (1995)
Record low36° (2007)
Wed, 2559° / 46°0.06
59 °
San Quentin, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high59°
Average low46°
Average precipitation0.06 in
Chance of precipitation22%
Record high71° (1975)
Record low35° (2010)
Thu, 2659° / 45°0.06
59 °
San Quentin, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high59°
Average low45°
Average precipitation0.06 in
Chance of precipitation22%
Record high67° (2002)
Record low35° (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 San Quentin, 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 San Quentin, 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.