Monthly outlook for Westmont, CA: average high 73.1°, average low 61.7°. That is 1° below the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 3 November (78.5°), the coolest 28 October (52.9°).
73.1°/61.7°
Average high / low
−1°
Below normal
1 / 1
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
71.3°
75.5°
-2.4°
1 November – 10 November
76.1°
72.9°
+1.7°
11 November – 20 November
at normal
70.6°
—
October records over 66 years
103.5°24 October 2017All-time high
36.1°30 October 1971All-time low
Fri, 2370° / 61°0
70 °
Westmont, Friday, 23 October
Overcast. High 70°, low 61°.
Pressure30.00 inHg
Wind1.6 mph NE
Humidity60%
Visibility6.2 mi
Dew point54°
Sat, 2476° / 61°0
76 °
Westmont, Saturday, 24 October
Clear. High 76°, low 61°.
Pressure29.94 inHg
Wind1.4 mph S
Humidity60%
Visibility6.2 mi
Dew point57°
Sun, 2576° / 57°0
76 °
Westmont, Sunday, 25 October
Clear. High 76°, low 57°.
Pressure30.03 inHg
Wind1.2 mph E
Humidity56%
Visibility6.2 mi
Dew point57°
Mon, 2675° / 56°0
75 °
Westmont, Monday, 26 October
Overcast. High 75°, low 56°.
Pressure30.03 inHg
Wind2.3 mph SW
Humidity61%
Visibility6.2 mi
Dew point59°
Tue, 2773° / 55°0
73 °
Westmont, Tuesday, 27 October
Clear. High 73°, low 55°.
Pressure30.00 inHg
Wind3.7 mph SW
Humidity66%
Visibility—
Dew point54°
Wed, 2871° / 53°0
71 °
Westmont, Wednesday, 28 October
Overcast. High 71°, low 53°.
Pressure29.97 inHg
Wind8.3 mph S
Humidity53%
Visibility—
Dew point49°
Thu, 2967° / 63°0.03
67 °
Westmont, Thursday, 29 October
Light rain. High 67°, low 63°.
Pressure29.91 inHg
Wind8.8 mph W
Humidity56%
Visibility—
Dew point49°
Fri, 3068° / 62°0
68 °
Westmont, Friday, 30 October
Mostly clear. High 68°, low 62°.
Pressure29.97 inHg
Wind8.7 mph SW
Humidity58%
Visibility—
Dew point50°
Sat, 3167° / 63°0
67 °
Westmont, Saturday, 31 October
Overcast. High 67°, low 63°.
Pressure30.03 inHg
Wind8.7 mph SW
Humidity56%
Visibility—
Dew point49°
Sun, 0170° / 63°0
70 °
Westmont, Sunday, 1 November
Overcast. High 70°, low 63°.
Pressure30.06 inHg
Wind10.9 mph SW
Humidity53%
Visibility—
Dew point48°
Mon, 0276° / 64°0
76 °
Westmont, Monday, 2 November
Clear. High 76°, low 64°.
Pressure30.12 inHg
Wind9.5 mph W
Humidity18%
Visibility—
Dew point25°
Tue, 0378° / 66°0
78 °
Westmont, Tuesday, 3 November
Clear. High 78°, low 66°.
Pressure30.18 inHg
Wind7.7 mph SW
Humidity16%
Visibility—
Dew point24°
Wed, 0478° / 66°0
78 °
Westmont, Wednesday, 4 November
Clear. High 78°, low 66°.
Pressure30.15 inHg
Wind8.1 mph S
Humidity14%
Visibility—
Dew point20°
Thu, 0578° / 67°0
78 °
Westmont, Thursday, 5 November
Clear. High 78°, low 67°.
Pressure30.03 inHg
Wind8.2 mph W
Humidity16%
Visibility—
Dew point24°
Fri, 0676° / 68°0
76 °
Westmont, Friday, 6 November
Mostly clear. High 76°, low 68°.
Pressure30.06 inHg
Wind9.4 mph SW
Humidity30%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sun, 1571° / 50°0.06
71 °
Westmont, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.06 in
Chance of precipitation7%
Record high89° (2008)
Record low37° (2000)
Mon, 1670° / 50°0.04
70 °
Westmont, Monday, 16 November
Climate normal for this date — 60-year average.
Average high70°
Average low50°
Average precipitation0.04 in
Chance of precipitation10%
Record high92° (2020)
Record low36° (1964)
Tue, 1769° / 51°0.04
69 °
Westmont, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high69°
Average low51°
Average precipitation0.04 in
Chance of precipitation12%
Record high92° (2019)
Record low39° (1971)
Wed, 1870° / 49°0.04
70 °
Westmont, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.04 in
Chance of precipitation10%
Record high90° (2019)
Record low37° (1964)
Thu, 1970° / 48°0.06
70 °
Westmont, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high70°
Average low48°
Average precipitation0.06 in
Chance of precipitation7%
Record high86° (1989)
Record low32° (1964)
Fri, 2069° / 49°0.06
69 °
Westmont, Friday, 20 November
Climate normal for this date — 60-year average.
Average high69°
Average low49°
Average precipitation0.06 in
Chance of precipitation12%
Record high85° (2002)
Record low34° (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 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.