Monthly outlook for Westmont, CA: average high 75.7°, average low 65.1°. That is 0.2° below the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 16 October (93.4°), the coolest 22 October (56.3°).
75.7°/65.1°
Average high / low
−0.2°
Below normal
3 / 1
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
77.7°
76.7°
+0.6°
26 October – 4 November
72.4°
74.8°
-1.4°
5 November – 14 November
at normal
71.5°
—
October records over 66 years
103.5°24 October 2017All-time high
36.1°30 October 1971All-time low
Sat, 1792° / 77°0
92 °
Westmont, Saturday, 17 October
Clear. High 92°, low 77°.
Pressure30.00 inHg
Wind1.3 mph E
Humidity14%
Visibility6.2 mi
Dew point36°
Sun, 1887° / 69°0
87 °
Westmont, Sunday, 18 October
Clear. High 87°, low 69°.
Pressure29.97 inHg
Wind1.7 mph SE
Humidity16%
Visibility6.2 mi
Dew point36°
Mon, 1982° / 63°0
82 °
Westmont, Monday, 19 October
Clear. High 82°, low 63°.
Pressure29.91 inHg
Wind2.6 mph S
Humidity36%
Visibility6.2 mi
Dew point53°
Tue, 2075° / 62°0
75 °
Westmont, Tuesday, 20 October
Mostly clear. High 75°, low 62°.
Pressure29.88 inHg
Wind3.8 mph SW
Humidity55%
Visibility6.2 mi
Dew point56°
Wed, 2166° / 59°0.42
66 °
Westmont, Wednesday, 21 October
Rain. High 66°, low 59°.
Pressure29.91 inHg
Wind4.3 mph SW
Humidity71%
Visibility—
Dew point56°
Thu, 2270° / 56°0.06
70 °
Westmont, Thursday, 22 October
Light rain. High 70°, low 56°.
Pressure29.97 inHg
Wind12.9 mph SW
Humidity66%
Visibility—
Dew point54°
Fri, 2372° / 65°0
72 °
Westmont, Friday, 23 October
Clear. High 72°, low 65°.
Pressure30.00 inHg
Wind10.9 mph SW
Humidity58%
Visibility—
Dew point53°
Sat, 2468° / 63°0.02
68 °
Westmont, Saturday, 24 October
Light rain. High 68°, low 63°.
Pressure29.94 inHg
Wind12 mph SW
Humidity57%
Visibility—
Dew point48°
Sun, 2572° / 64°0
72 °
Westmont, Sunday, 25 October
Partly cloudy. High 72°, low 64°.
Pressure30.03 inHg
Wind8.1 mph SW
Humidity52%
Visibility—
Dew point49°
Mon, 2677° / 68°0
77 °
Westmont, Monday, 26 October
Overcast. High 77°, low 68°.
Pressure29.91 inHg
Wind6.2 mph SW
Humidity27%
Visibility—
Dew point37°
Tue, 2780° / 66°0.02
80 °
Westmont, Tuesday, 27 October
Light rain. High 80°, low 66°.
Pressure29.77 inHg
Wind13.5 mph SW
Humidity24%
Visibility—
Dew point36°
Wed, 2869° / 64°0.13
69 °
Westmont, Wednesday, 28 October
Light rain. High 69°, low 64°.
Pressure29.68 inHg
Wind17.6 mph SW
Humidity57%
Visibility—
Dew point52°
Thu, 2967° / 63°0.02
67 °
Westmont, Thursday, 29 October
Light rain. High 67°, low 63°.
Pressure30.03 inHg
Wind7.5 mph SW
Humidity56%
Visibility—
Dew point49°
Fri, 3070° / 63°0
70 °
Westmont, Friday, 30 October
Overcast. High 70°, low 63°.
Pressure30.03 inHg
Wind8.8 mph W
Humidity52%
Visibility—
Dew point48°
Sat, 3172° / 66°0
72 °
Westmont, Saturday, 31 October
Overcast. High 72°, low 66°.
Pressure30.03 inHg
Wind7.9 mph SW
Humidity51%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0175° / 52°0.04
75 °
Westmont, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high75°
Average low52°
Average precipitation0.04 in
Chance of precipitation10%
Record high94° (1966)
Record low41° (1971)
Mon, 0275° / 53°0.01
75 °
Westmont, Monday, 2 November
Climate normal for this date — 60-year average.
Average high75°
Average low53°
Average precipitation0.01 in
Chance of precipitation7%
Record high94° (1997)
Record low43° (1971)
Tue, 0375° / 52°0
75 °
Westmont, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high75°
Average low52°
Average precipitation0 in
Chance of precipitation2%
Record high93° (2010)
Record low43° (1990)
Wed, 0474° / 53°0.02
74 °
Westmont, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high74°
Average low53°
Average precipitation0.02 in
Chance of precipitation7%
Record high94° (1976)
Record low39° (1994)
Thu, 0573° / 52°0
73 °
Westmont, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high73°
Average low52°
Average precipitation0 in
Chance of precipitation2%
Record high95° (2020)
Record low43° (2011)
Fri, 0672° / 53°0.02
72 °
Westmont, Friday, 6 November
Climate normal for this date — 60-year average.
Average high72°
Average low53°
Average precipitation0.02 in
Chance of precipitation7%
Record high91° (2006)
Record low44° (2011)
Sat, 0771° / 53°0.06
71 °
Westmont, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.06 in
Chance of precipitation10%
Record high89° (2006)
Record low40° (2011)
Sun, 0871° / 52°0.07
71 °
Westmont, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high71°
Average low52°
Average precipitation0.07 in
Chance of precipitation17%
Record high88° (2016)
Record low41° (2011)
Mon, 0971° / 51°0.03
71 °
Westmont, Monday, 9 November
Climate normal for this date — 60-year average.
Average high71°
Average low51°
Average precipitation0.03 in
Chance of precipitation8%
Record high91° (2016)
Record low40° (2011)
Tue, 1071° / 51°0.03
71 °
Westmont, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high71°
Average low51°
Average precipitation0.03 in
Chance of precipitation12%
Record high89° (1990)
Record low42° (2022)
Wed, 1171° / 51°0.04
71 °
Westmont, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high71°
Average low51°
Average precipitation0.04 in
Chance of precipitation8%
Record high89° (2021)
Record low39° (2012)
Thu, 1272° / 51°0.03
72 °
Westmont, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high72°
Average low51°
Average precipitation0.03 in
Chance of precipitation10%
Record high94° (2021)
Record low38° (2000)
Fri, 1372° / 50°0.03
72 °
Westmont, Friday, 13 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.03 in
Chance of precipitation8%
Record high92° (2021)
Record low37° (2000)
Sat, 1471° / 50°0.04
71 °
Westmont, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.04 in
Chance of precipitation7%
Record high90° (2021)
Record low37° (1985)
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 Westmont, 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 Westmont, 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.