Monthly outlook for Millbrae, CA: average high 68.9°, average low 55.9°. That is 0.1° below the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 1 days and 0.5 inches. The warmest day looks like 7 October (89.9°), the coolest 20 October (53.7°).
68.9°/55.9°
Average high / low
−0.1°
Below normal
0 / 1
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
70.9°
69.8°
+0.6°
17 October – 26 October
65.5°
67.8°
-1.3°
27 October – 5 November
at normal
65.3°
—
October records over 66 years
100.9°1 October 2024All-time high
42.4°29 October 2019All-time low
Thu, 0888° / 57°0
88 °
Millbrae, Thursday, 8 October
Mostly clear. High 88°, low 57°.
Pressure29.88 inHg
Wind4.3 mph NW
Humidity59%
Visibility6.2 mi
Dew point55°
Fri, 0967° / 58°0
67 °
Millbrae, Friday, 9 October
Overcast. High 67°, low 58°.
Pressure29.80 inHg
Wind7.9 mph SW
Humidity75%
Visibility2.6 mi
Dew point57°
Sat, 1061° / 57°0
61 °
Millbrae, Saturday, 10 October
Overcast. High 61°, low 57°.
Pressure29.71 inHg
Wind11.5 mph W
Humidity69%
Visibility6.2 mi
Dew point51°
Sun, 1164° / 55°0
64 °
Millbrae, Sunday, 11 October
Partly cloudy. High 64°, low 55°.
Pressure29.53 inHg
Wind8.8 mph SW
Humidity69%
Visibility—
Dew point49°
Mon, 1270° / 56°0
70 °
Millbrae, Monday, 12 October
Clear. High 70°, low 56°.
Pressure29.77 inHg
Wind9.3 mph E
Humidity56%
Visibility—
Dew point47°
Tue, 1365° / 56°0
65 °
Millbrae, Tuesday, 13 October
Overcast. High 65°, low 56°.
Pressure29.97 inHg
Wind11.7 mph W
Humidity60%
Visibility—
Dew point49°
Wed, 1464° / 55°0
64 °
Millbrae, Wednesday, 14 October
Clear. High 64°, low 55°.
Pressure29.94 inHg
Wind11.8 mph W
Humidity74%
Visibility—
Dew point52°
Thu, 1571° / 55°0
71 °
Millbrae, Thursday, 15 October
Clear. High 71°, low 55°.
Pressure29.97 inHg
Wind9.9 mph NW
Humidity38%
Visibility—
Dew point38°
Fri, 1671° / 56°0
71 °
Millbrae, Friday, 16 October
Clear. High 71°, low 56°.
Pressure29.97 inHg
Wind6.8 mph W
Humidity35%
Visibility—
Dew point37°
Sat, 1767° / 56°0
67 °
Millbrae, Saturday, 17 October
Clear. High 67°, low 56°.
Pressure29.88 inHg
Wind10 mph NW
Humidity48%
Visibility—
Dew point44°
Sun, 1864° / 55°0
64 °
Millbrae, Sunday, 18 October
Overcast. High 64°, low 55°.
Pressure29.83 inHg
Wind13.2 mph W
Humidity66%
Visibility—
Dew point49°
Mon, 1964° / 55°0
64 °
Millbrae, Monday, 19 October
Overcast. High 64°, low 55°.
Pressure29.88 inHg
Wind9.4 mph SW
Humidity67%
Visibility—
Dew point51°
Tue, 2065° / 54°0
65 °
Millbrae, Tuesday, 20 October
Clear. High 65°, low 54°.
Pressure29.94 inHg
Wind9.6 mph W
Humidity64%
Visibility—
Dew point49°
Wed, 2166° / 55°0
66 °
Millbrae, Wednesday, 21 October
Clear. High 66°, low 55°.
Pressure30.00 inHg
Wind6.5 mph W
Humidity54%
Visibility—
Dew point47°
Thu, 2267° / 57°0
67 °
Millbrae, Thursday, 22 October
Overcast. High 67°, low 57°.
Pressure30.00 inHg
Wind6.6 mph W
Humidity60%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2368° / 54°0.06
68 °
Millbrae, Friday, 23 October
Climate normal for this date — 60-year average.
Average high68°
Average low54°
Average precipitation0.06 in
Chance of precipitation17%
Record high89° (1965)
Record low47° (2024)
Sat, 2468° / 54°0.09
68 °
Millbrae, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high68°
Average low54°
Average precipitation0.09 in
Chance of precipitation12%
Record high87° (2017)
Record low48° (1975)
Sun, 2567° / 54°0.06
67 °
Millbrae, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high67°
Average low54°
Average precipitation0.06 in
Chance of precipitation18%
Record high87° (2017)
Record low48° (2006)
Mon, 2667° / 53°0.06
67 °
Millbrae, Monday, 26 October
Climate normal for this date — 60-year average.
Average high67°
Average low53°
Average precipitation0.06 in
Chance of precipitation12%
Record high87° (2017)
Record low46° (2023)
Tue, 2766° / 53°0.02
66 °
Millbrae, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high66°
Average low53°
Average precipitation0.02 in
Chance of precipitation10%
Record high83° (2003)
Record low44° (2022)
Wed, 2865° / 53°0.07
65 °
Millbrae, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high65°
Average low53°
Average precipitation0.07 in
Chance of precipitation15%
Record high81° (2003)
Record low45° (2022)
Thu, 2965° / 52°0.05
65 °
Millbrae, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high65°
Average low52°
Average precipitation0.05 in
Chance of precipitation17%
Record high77° (1966)
Record low42° (2019)
Fri, 3065° / 52°0.06
65 °
Millbrae, Friday, 30 October
Climate normal for this date — 60-year average.
Average high65°
Average low52°
Average precipitation0.06 in
Chance of precipitation17%
Record high81° (1966)
Record low44° (1971)
Sat, 3166° / 52°0.02
66 °
Millbrae, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high66°
Average low52°
Average precipitation0.02 in
Chance of precipitation15%
Record high80° (1966)
Record low44° (2023)
Sun, 0166° / 52°0.05
66 °
Millbrae, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high66°
Average low52°
Average precipitation0.05 in
Chance of precipitation13%
Record high82° (2020)
Record low41° (2019)
Mon, 0266° / 52°0.03
66 °
Millbrae, Monday, 2 November
Climate normal for this date — 60-year average.
Average high66°
Average low52°
Average precipitation0.03 in
Chance of precipitation13%
Record high82° (2020)
Record low44° (2003)
Tue, 0366° / 51°0.04
66 °
Millbrae, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high66°
Average low51°
Average precipitation0.04 in
Chance of precipitation12%
Record high80° (1976)
Record low43° (2022)
Wed, 0465° / 52°0.03
65 °
Millbrae, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high65°
Average low52°
Average precipitation0.03 in
Chance of precipitation15%
Record high82° (1976)
Record low43° (2011)
Thu, 0564° / 52°0.05
64 °
Millbrae, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high64°
Average low52°
Average precipitation0.05 in
Chance of precipitation15%
Record high78° (2012)
Record low44° (2019)
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 Millbrae, 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 Millbrae, 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.