Monthly outlook for Montclair, CA: average high 79.1°, average low 62.3°. That is 0.3° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 1 days and 0.4 inches. The warmest day looks like 16 October (87°), the coolest 13 October (51.9°).
79.1°/62.3°
Average high / low
+0.3°
Above normal
1 / 1
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
78.1°
79.3°
-0.7°
23 October – 1 November
80.9°
76.3°
+2.6°
2 November – 11 November
at normal
73.3°
—
October records over 66 years
104.2°1 October 2020All-time high
34.2°29 October 1971All-time low
Wed, 1480° / 54°0
80 °
Montclair, Wednesday, 14 October
Clear. High 80°, low 54°.
Pressure30.09 inHg
Wind3 mph SW
Humidity30%
Visibility6.2 mi
Dew point40°
Thu, 1583° / 52°0
83 °
Montclair, Thursday, 15 October
Clear. High 83°, low 52°.
Pressure30.00 inHg
Wind2.8 mph S
Humidity30%
Visibility6.2 mi
Dew point47°
Fri, 1687° / 63°0
87 °
Montclair, Friday, 16 October
Clear. High 87°, low 63°.
Pressure29.97 inHg
Wind4.5 mph E
Humidity25%
Visibility6.2 mi
Dew point46°
Sat, 1784° / 63°0
84 °
Montclair, Saturday, 17 October
Clear. High 84°, low 63°.
Pressure30.03 inHg
Wind5.3 mph NE
Humidity31%
Visibility—
Dew point43°
Sun, 1882° / 64°0
82 °
Montclair, Sunday, 18 October
Clear. High 82°, low 64°.
Pressure30.03 inHg
Wind5.2 mph W
Humidity29%
Visibility—
Dew point41°
Mon, 1980° / 65°0
80 °
Montclair, Monday, 19 October
Partly cloudy. High 80°, low 65°.
Pressure29.94 inHg
Wind11.8 mph SW
Humidity33%
Visibility—
Dew point45°
Tue, 2066° / 62°0.15
66 °
Montclair, Tuesday, 20 October
Light rain. High 66°, low 62°.
Pressure29.85 inHg
Wind9.8 mph SW
Humidity63%
Visibility—
Dew point51°
Wed, 2171° / 60°0
71 °
Montclair, Wednesday, 21 October
Clear. High 71°, low 60°.
Pressure29.91 inHg
Wind10.2 mph SW
Humidity30%
Visibility—
Dew point34°
Thu, 2276° / 62°0
76 °
Montclair, Thursday, 22 October
Clear. High 76°, low 62°.
Pressure30.09 inHg
Wind8.8 mph SW
Humidity20%
Visibility—
Dew point27°
Fri, 2384° / 66°0
84 °
Montclair, Friday, 23 October
Clear. High 84°, low 66°.
Pressure30.03 inHg
Wind17 mph NE
Humidity10%
Visibility—
Dew point15°
Sat, 2479° / 65°0
79 °
Montclair, Saturday, 24 October
Clear. High 79°, low 65°.
Pressure30.15 inHg
Wind21.7 mph NE
Humidity10%
Visibility—
Dew point13°
Sun, 2584° / 68°0
84 °
Montclair, Sunday, 25 October
Clear. High 84°, low 68°.
Pressure30.00 inHg
Wind8.9 mph N
Humidity8%
Visibility—
Dew point12°
Mon, 2681° / 69°0
81 °
Montclair, Monday, 26 October
Clear. High 81°, low 69°.
Pressure29.97 inHg
Wind9.3 mph SW
Humidity15%
Visibility—
Dew point25°
Tue, 2779° / 67°0
79 °
Montclair, Tuesday, 27 October
Overcast. High 79°, low 67°.
Pressure30.03 inHg
Wind8.6 mph SW
Humidity21%
Visibility—
Dew point32°
Wed, 2878° / 66°0
78 °
Montclair, Wednesday, 28 October
Overcast. High 78°, low 66°.
Pressure30.03 inHg
Wind8 mph SW
Humidity28%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2975° / 53°0.01
75 °
Montclair, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high75°
Average low53°
Average precipitation0.01 in
Chance of precipitation8%
Record high91° (1965)
Record low34° (1971)
Fri, 3074° / 53°0.05
74 °
Montclair, Friday, 30 October
Climate normal for this date — 60-year average.
Average high74°
Average low53°
Average precipitation0.05 in
Chance of precipitation20%
Record high91° (1966)
Record low35° (1971)
Sat, 3175° / 53°0.02
75 °
Montclair, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high75°
Average low53°
Average precipitation0.02 in
Chance of precipitation5%
Record high91° (1966)
Record low38° (1971)
Sun, 0176° / 53°0.04
76 °
Montclair, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high76°
Average low53°
Average precipitation0.04 in
Chance of precipitation12%
Record high91° (1997)
Record low42° (1971)
Mon, 0275° / 53°0.02
75 °
Montclair, Monday, 2 November
Climate normal for this date — 60-year average.
Average high75°
Average low53°
Average precipitation0.02 in
Chance of precipitation13%
Record high91° (1997)
Record low43° (1974)
Tue, 0376° / 52°0
76 °
Montclair, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high76°
Average low52°
Average precipitation0 in
Chance of precipitation5%
Record high92° (2010)
Record low42° (1974)
Wed, 0476° / 52°0.03
76 °
Montclair, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high76°
Average low52°
Average precipitation0.03 in
Chance of precipitation5%
Record high92° (2020)
Record low39° (1994)
Thu, 0574° / 52°0.01
74 °
Montclair, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high74°
Average low52°
Average precipitation0.01 in
Chance of precipitation7%
Record high94° (2020)
Record low40° (2011)
Fri, 0673° / 52°0.02
73 °
Montclair, Friday, 6 November
Climate normal for this date — 60-year average.
Average high73°
Average low52°
Average precipitation0.02 in
Chance of precipitation8%
Record high89° (2006)
Record low41° (2011)
Sat, 0772° / 51°0.06
72 °
Montclair, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high72°
Average low51°
Average precipitation0.06 in
Chance of precipitation12%
Record high91° (2006)
Record low37° (2011)
Sun, 0872° / 51°0.09
72 °
Montclair, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high72°
Average low51°
Average precipitation0.09 in
Chance of precipitation22%
Record high90° (2016)
Record low39° (2011)
Mon, 0972° / 51°0.05
72 °
Montclair, Monday, 9 November
Climate normal for this date — 60-year average.
Average high72°
Average low51°
Average precipitation0.05 in
Chance of precipitation12%
Record high90° (2016)
Record low40° (1998)
Tue, 1071° / 50°0.04
71 °
Montclair, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.04 in
Chance of precipitation10%
Record high91° (2025)
Record low42° (1966)
Wed, 1171° / 50°0.06
71 °
Montclair, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.06 in
Chance of precipitation13%
Record high90° (2021)
Record low38° (1982)
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 Montclair, 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 Montclair, 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.