Monthly outlook for Montclair, CA: average high 80.2°, average low 65.4°. That is 0.5° above the climate normal for October. Precipitation is expected on 2 days (about 2.5 inches), against a normal of 1 days and 0.4 inches. The warmest day looks like 25 October (94.4°), the coolest 13 October (48.7°).
80.2°/65.4°
Average high / low
+0.5°
Above normal
2 / 1
Wet days / normal
2.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
77°
80°
-1.7°
20 October – 29 October
85.7°
77.3°
+4.7°
30 October – 8 November
at normal
74.4°
—
October records over 66 years
104.2°1 October 2020All-time high
34.2°29 October 1971All-time low
Sun, 1167° / 57°1.41
67 °
Montclair, Sunday, 11 October
Heavy rain. High 67°, low 57°.
Pressure29.74 inHg
Wind3.3 mph SW
Humidity95%
Visibility1.6 mi
Dew point59°
Mon, 1258° / 53°1.03
58 °
Montclair, Monday, 12 October
Rain. High 58°, low 53°.
Pressure29.88 inHg
Wind2.5 mph W
Humidity86%
Visibility2.0 mi
Dew point54°
Tue, 1361° / 49°0
61 °
Montclair, Tuesday, 13 October
Partly cloudy. High 61°, low 49°.
Pressure30.00 inHg
Wind1.9 mph W
Humidity65%
Visibility6.2 mi
Dew point48°
Wed, 1469° / 51°0
69 °
Montclair, Wednesday, 14 October
Clear. High 69°, low 51°.
Pressure30.06 inHg
Wind3.4 mph NE
Humidity56%
Visibility—
Dew point47°
Thu, 1578° / 54°0
78 °
Montclair, Thursday, 15 October
Clear. High 78°, low 54°.
Pressure30.03 inHg
Wind4.7 mph SW
Humidity48%
Visibility—
Dew point50°
Fri, 1691° / 64°0
91 °
Montclair, Friday, 16 October
Clear. High 91°, low 64°.
Pressure30.00 inHg
Wind6.2 mph NE
Humidity14%
Visibility—
Dew point29°
Sat, 1794° / 76°0
94 °
Montclair, Saturday, 17 October
Clear. High 94°, low 76°.
Pressure29.97 inHg
Wind6.1 mph NE
Humidity15%
Visibility—
Dew point34°
Sun, 1890° / 78°0
90 °
Montclair, Sunday, 18 October
Clear. High 90°, low 78°.
Pressure30.00 inHg
Wind10.3 mph SW
Humidity25%
Visibility—
Dew point46°
Mon, 1984° / 73°0
84 °
Montclair, Monday, 19 October
Clear. High 84°, low 73°.
Pressure30.00 inHg
Wind10.4 mph SW
Humidity39%
Visibility—
Dew point51°
Tue, 2085° / 70°0
85 °
Montclair, Tuesday, 20 October
Clear. High 85°, low 70°.
Pressure29.94 inHg
Wind8.5 mph SW
Humidity38%
Visibility—
Dew point50°
Wed, 2189° / 74°0
89 °
Montclair, Wednesday, 21 October
Clear. High 89°, low 74°.
Pressure29.94 inHg
Wind9.4 mph SW
Humidity23%
Visibility—
Dew point41°
Thu, 2286° / 73°0
86 °
Montclair, Thursday, 22 October
Clear. High 86°, low 73°.
Pressure29.94 inHg
Wind9.1 mph SW
Humidity34%
Visibility—
Dew point50°
Fri, 2380° / 69°0
80 °
Montclair, Friday, 23 October
Partly cloudy. High 80°, low 69°.
Pressure29.97 inHg
Wind10.7 mph SW
Humidity53%
Visibility—
Dew point57°
Sat, 2480° / 67°0
80 °
Montclair, Saturday, 24 October
Clear. High 80°, low 67°.
Pressure30.00 inHg
Wind8.7 mph SW
Humidity51%
Visibility—
Dew point55°
Sun, 2594° / 72°0
94 °
Montclair, Sunday, 25 October
Clear. High 94°, low 72°.
Pressure29.94 inHg
Wind10 mph N
Humidity27%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2677° / 55°0.01
77 °
Montclair, Monday, 26 October
Climate normal for this date — 60-year average.
Average high77°
Average low55°
Average precipitation0.01 in
Chance of precipitation7%
Record high92° (1965)
Record low44° (1970)
Tue, 2776° / 55°0.06
76 °
Montclair, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high76°
Average low55°
Average precipitation0.06 in
Chance of precipitation10%
Record high92° (2008)
Record low44° (1996)
Wed, 2876° / 53°0.02
76 °
Montclair, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high76°
Average low53°
Average precipitation0.02 in
Chance of precipitation12%
Record high93° (2008)
Record low44° (1996)
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)
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.