Monthly outlook for Fairfax, CA: average high 66.5°, average low 53.8°. That is 0.8° above the climate normal for October. Precipitation is expected on 5 days (about 1.9 inches), against a normal of 2 days and 0.9 inches. The warmest day looks like 24 October (71.8°), the coolest 23 October (45.6°).
66.5°/53.8°
Average high / low
+0.8°
Above normal
5 / 2
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
68.8°
65.5°
+1.8°
29 October – 7 November
62.6°
63.6°
-0.6°
8 November – 17 November
at normal
60.7°
—
October records over 66 years
96.4°1 October 2024All-time high
43.2°29 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Bolinas (8 mi).
Tue, 2070° / 49°0.02
70 °
Fairfax, Tuesday, 20 October
Light rain. High 70°, low 49°.
Pressure29.94 inHg
Wind3.7 mph E
Humidity56%
Visibility6.2 mi
Dew point45°
Wed, 2171° / 51°0.04
71 °
Fairfax, Wednesday, 21 October
Light rain. High 71°, low 51°.
Pressure29.88 inHg
Wind0.8 mph NE
Humidity50%
Visibility6.2 mi
Dew point49°
Thu, 2262° / 52°0.06
62 °
Fairfax, Thursday, 22 October
Light rain. High 62°, low 52°.
Pressure29.97 inHg
Wind5.1 mph W
Humidity82%
Visibility6.2 mi
Dew point55°
Fri, 2369° / 46°0
69 °
Fairfax, Friday, 23 October
Clear. High 69°, low 46°.
Pressure30.12 inHg
Wind5.1 mph N
Humidity54%
Visibility6.2 mi
Dew point48°
Sat, 2472° / 48°0
72 °
Fairfax, Saturday, 24 October
Partly cloudy. High 72°, low 48°.
Pressure30.03 inHg
Wind4.8 mph NW
Humidity25%
Visibility—
Dew point28°
Sun, 2568° / 50°0
68 °
Fairfax, Sunday, 25 October
Overcast. High 68°, low 50°.
Pressure30.12 inHg
Wind4.3 mph N
Humidity45%
Visibility—
Dew point39°
Mon, 2670° / 59°0
70 °
Fairfax, Monday, 26 October
Overcast. High 70°, low 59°.
Pressure30.06 inHg
Wind5.1 mph NW
Humidity40%
Visibility—
Dew point41°
Tue, 2770° / 58°0
70 °
Fairfax, Tuesday, 27 October
Overcast. High 70°, low 58°.
Pressure30.03 inHg
Wind5.4 mph NW
Humidity40%
Visibility—
Dew point40°
Wed, 2869° / 59°0
69 °
Fairfax, Wednesday, 28 October
Overcast. High 69°, low 59°.
Pressure29.94 inHg
Wind4.6 mph NW
Humidity40%
Visibility—
Dew point41°
Thu, 2965° / 56°0
65 °
Fairfax, Thursday, 29 October
Overcast. High 65°, low 56°.
Pressure29.91 inHg
Wind5.5 mph SW
Humidity51%
Visibility—
Dew point45°
Fri, 3062° / 53°0.09
62 °
Fairfax, Friday, 30 October
Light rain. High 62°, low 53°.
Pressure29.97 inHg
Wind5.8 mph NE
Humidity55%
Visibility—
Dew point44°
Sat, 3166° / 54°0
66 °
Fairfax, Saturday, 31 October
Light rain. High 66°, low 54°.
Pressure30.09 inHg
Wind6.9 mph NE
Humidity66%
Visibility—
Dew point49°
Sun, 0160° / 57°0.72
60 °
Fairfax, Sunday, 1 November
Rain. High 60°, low 57°.
Pressure30.03 inHg
Wind7.1 mph NE
Humidity74%
Visibility—
Dew point51°
Mon, 0263° / 59°0.89
63 °
Fairfax, Monday, 2 November
Heavy rain. High 63°, low 59°.
Pressure29.88 inHg
Wind21.2 mph S
Humidity91%
Visibility—
Dew point59°
Tue, 0361° / 57°0.03
61 °
Fairfax, Tuesday, 3 November
Light rain. High 61°, low 57°.
Pressure30.00 inHg
Wind6.5 mph SW
Humidity84%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0464° / 51°0.03
64 °
Fairfax, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high64°
Average low51°
Average precipitation0.03 in
Chance of precipitation12%
Record high79° (1976)
Record low44° (2003)
Thu, 0562° / 51°0.08
62 °
Fairfax, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high62°
Average low51°
Average precipitation0.08 in
Chance of precipitation15%
Record high77° (2020)
Record low46° (1996)
Fri, 0662° / 51°0.07
62 °
Fairfax, Friday, 6 November
Climate normal for this date — 60-year average.
Average high62°
Average low51°
Average precipitation0.07 in
Chance of precipitation20%
Record high75° (1978)
Record low45° (1996)
Sat, 0762° / 51°0.1
62 °
Fairfax, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high62°
Average low51°
Average precipitation0.1 in
Chance of precipitation25%
Record high77° (1991)
Record low43° (2022)
Sun, 0862° / 50°0.09
62 °
Fairfax, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high62°
Average low50°
Average precipitation0.09 in
Chance of precipitation27%
Record high72° (1976)
Record low44° (2011)
Mon, 0961° / 49°0.11
61 °
Fairfax, Monday, 9 November
Climate normal for this date — 60-year average.
Average high61°
Average low49°
Average precipitation0.11 in
Chance of precipitation23%
Record high73° (2025)
Record low43° (1998)
Tue, 1061° / 50°0.16
61 °
Fairfax, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high61°
Average low50°
Average precipitation0.16 in
Chance of precipitation32%
Record high74° (2025)
Record low42° (1994)
Wed, 1161° / 50°0.11
61 °
Fairfax, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high61°
Average low50°
Average precipitation0.11 in
Chance of precipitation27%
Record high75° (1990)
Record low39° (2000)
Thu, 1261° / 49°0.08
61 °
Fairfax, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high61°
Average low49°
Average precipitation0.08 in
Chance of precipitation17%
Record high72° (1990)
Record low37° (1985)
Fri, 1361° / 50°0.17
61 °
Fairfax, Friday, 13 November
Climate normal for this date — 60-year average.
Average high61°
Average low50°
Average precipitation0.17 in
Chance of precipitation30%
Record high70° (1974)
Record low38° (1985)
Sat, 1461° / 49°0.05
61 °
Fairfax, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high61°
Average low49°
Average precipitation0.05 in
Chance of precipitation27%
Record high77° (2008)
Record low38° (1985)
Sun, 1561° / 50°0.11
61 °
Fairfax, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high61°
Average low50°
Average precipitation0.11 in
Chance of precipitation25%
Record high75° (2008)
Record low38° (2000)
Mon, 1660° / 50°0.16
60 °
Fairfax, Monday, 16 November
Climate normal for this date — 60-year average.
Average high60°
Average low50°
Average precipitation0.16 in
Chance of precipitation30%
Record high72° (2008)
Record low41° (2000)
Tue, 1760° / 49°0.16
60 °
Fairfax, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high60°
Average low49°
Average precipitation0.16 in
Chance of precipitation25%
Record high72° (2008)
Record low41° (1964)
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 Fairfax, 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 Fairfax, 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.