Monthly outlook for Westmont, CA: average high 74.8°, average low 65°. That is 0.6° below the climate normal for October. Precipitation is expected on 2 days (about 1.6 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 18 October (90.3°), the coolest 22 October (56.9°).
74.8°/65°
Average high / low
−0.6°
Below normal
2 / 1
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
77.8°
76.6°
+0.7°
27 October – 5 November
69.7°
74.5°
-2.6°
6 November – 15 November
at normal
71.4°
—
October records over 66 years
103.5°24 October 2017All-time high
36.1°30 October 1971All-time low
Sun, 1890° / 71°0
90 °
Westmont, Sunday, 18 October
Clear. High 90°, low 71°.
Pressure29.97 inHg
Wind0.9 mph S
Humidity17%
Visibility6.2 mi
Dew point39°
Mon, 1985° / 64°0
85 °
Westmont, Monday, 19 October
Clear. High 85°, low 64°.
Pressure29.88 inHg
Wind2.8 mph S
Humidity32%
Visibility6.2 mi
Dew point52°
Tue, 2078° / 63°0
78 °
Westmont, Tuesday, 20 October
Clear. High 78°, low 63°.
Pressure29.85 inHg
Wind2.7 mph S
Humidity52%
Visibility6.2 mi
Dew point58°
Wed, 2173° / 60°0.2
73 °
Westmont, Wednesday, 21 October
Rain. High 73°, low 60°.
Pressure29.91 inHg
Wind3.2 mph S
Humidity52%
Visibility6.2 mi
Dew point54°
Thu, 2266° / 57°1.31
66 °
Westmont, Thursday, 22 October
Heavy rain. High 66°, low 57°.
Pressure29.91 inHg
Wind6.5 mph E
Humidity77%
Visibility—
Dew point58°
Fri, 2371° / 58°0
71 °
Westmont, Friday, 23 October
Clear. High 71°, low 58°.
Pressure30.00 inHg
Wind12.3 mph SW
Humidity63%
Visibility—
Dew point52°
Sat, 2476° / 67°0
76 °
Westmont, Saturday, 24 October
Clear. High 76°, low 67°.
Pressure29.97 inHg
Wind8.7 mph SW
Humidity37%
Visibility—
Dew point44°
Sun, 2577° / 69°0
77 °
Westmont, Sunday, 25 October
Overcast. High 77°, low 69°.
Pressure29.91 inHg
Wind7.7 mph W
Humidity41%
Visibility—
Dew point48°
Mon, 2673° / 68°0
73 °
Westmont, Monday, 26 October
Overcast. High 73°, low 68°.
Pressure29.74 inHg
Wind13.7 mph W
Humidity57%
Visibility—
Dew point56°
Tue, 2769° / 65°0.04
69 °
Westmont, Tuesday, 27 October
Light rain. High 69°, low 65°.
Pressure29.91 inHg
Wind12.4 mph SW
Humidity57%
Visibility—
Dew point52°
Wed, 2869° / 64°0.02
69 °
Westmont, Wednesday, 28 October
Light rain. High 69°, low 64°.
Pressure30.12 inHg
Wind13 mph W
Humidity56%
Visibility—
Dew point51°
Thu, 2969° / 63°0
69 °
Westmont, Thursday, 29 October
Overcast. High 69°, low 63°.
Pressure30.00 inHg
Wind11.1 mph W
Humidity57%
Visibility—
Dew point50°
Fri, 3070° / 63°0
70 °
Westmont, Friday, 30 October
Clear. High 70°, low 63°.
Pressure30.00 inHg
Wind10.5 mph SW
Humidity43%
Visibility—
Dew point43°
Sat, 3171° / 65°0
71 °
Westmont, Saturday, 31 October
Overcast. High 71°, low 65°.
Pressure30.00 inHg
Wind9.8 mph W
Humidity57%
Visibility—
Dew point51°
Sun, 0170° / 66°0.01
70 °
Westmont, Sunday, 1 November
Light rain. High 70°, low 66°.
Pressure30.03 inHg
Wind8.2 mph SE
Humidity63%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
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)
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)
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.