Monthly outlook for Montclair, NJ: average high 82.9°, average low 66.9°. That is 1° above the climate normal for August. Precipitation is expected on 5 days (about 3.3 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 11 August (93.3°), the coolest 23 August (59°).
82.9°/66.9°
Average high / low
+1°
Above normal
5 / 6
Wet days / normal
3.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
85.1°
82°
+1.7°
18 August – 27 August
79.3°
80.1°
-0.4°
28 August – 6 September
at normal
78.9°
—
August records over 66 years
99.1°2 August 2006All-time high
49.3°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Glen Ridge (1 mi).
Sun, 0990° / 72°0
90 °
Montclair, Sunday, 9 August
Clear. High 90°, low 72°.
Pressure29.94 inHg
Wind6.8 mph W
Humidity37%
Visibility6.2 mi
Dew point62°
Mon, 1092° / 72°0.02
92 °
Montclair, Monday, 10 August
Light rain. High 92°, low 72°.
Pressure29.97 inHg
Wind7.3 mph SW
Humidity44%
Visibility6.2 mi
Dew point61°
Tue, 1193° / 73°0.04
93 °
Montclair, Tuesday, 11 August
Light rain. High 93°, low 73°.
Pressure29.88 inHg
Wind8.2 mph NW
Humidity30%
Visibility6.2 mi
Dew point54°
Wed, 1283° / 71°0.19
83 °
Montclair, Wednesday, 12 August
Light rain. High 83°, low 71°.
Pressure29.74 inHg
Wind6.1 mph NW
Humidity54%
Visibility6.2 mi
Dew point64°
Thu, 1388° / 67°0
88 °
Montclair, Thursday, 13 August
Overcast. High 88°, low 67°.
Pressure29.71 inHg
Wind14 mph NW
Humidity36%
Visibility—
Dew point56°
Fri, 1478° / 64°0
78 °
Montclair, Friday, 14 August
Mostly clear. High 78°, low 64°.
Pressure29.91 inHg
Wind10.5 mph N
Humidity28%
Visibility—
Dew point41°
Sat, 1577° / 60°0
77 °
Montclair, Saturday, 15 August
Clear. High 77°, low 60°.
Pressure30.12 inHg
Wind12.9 mph NW
Humidity29%
Visibility—
Dew point40°
Sun, 1681° / 60°0
81 °
Montclair, Sunday, 16 August
Partly cloudy. High 81°, low 60°.
Pressure30.27 inHg
Wind5.9 mph SW
Humidity24%
Visibility—
Dew point39°
Mon, 1783° / 63°0
83 °
Montclair, Monday, 17 August
Partly cloudy. High 83°, low 63°.
Pressure30.15 inHg
Wind9.9 mph SE
Humidity28%
Visibility—
Dew point45°
Tue, 1881° / 68°0.11
81 °
Montclair, Tuesday, 18 August
Light rain. High 81°, low 68°.
Pressure29.91 inHg
Wind8.7 mph SW
Humidity55%
Visibility—
Dew point62°
Wed, 1985° / 70°0.01
85 °
Montclair, Wednesday, 19 August
Light rain. High 85°, low 70°.
Pressure29.83 inHg
Wind11.3 mph N
Humidity36%
Visibility—
Dew point54°
Thu, 2082° / 65°0
82 °
Montclair, Thursday, 20 August
Overcast. High 82°, low 65°.
Pressure29.97 inHg
Wind6.6 mph N
Humidity38%
Visibility—
Dew point51°
Fri, 2174° / 68°2.22
74 °
Montclair, Friday, 21 August
Heavy rain. High 74°, low 68°.
Pressure29.91 inHg
Wind9.6 mph SW
Humidity70%
Visibility—
Dew point60°
Sat, 2282° / 67°0.7
82 °
Montclair, Saturday, 22 August
Heavy rain. High 82°, low 67°.
Pressure29.80 inHg
Wind7.7 mph NW
Humidity87%
Visibility—
Dew point66°
Sun, 2372° / 59°0
72 °
Montclair, Sunday, 23 August
Clear. High 72°, low 59°.
Pressure29.97 inHg
Wind15.3 mph NW
Humidity39%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2480° / 64°0.07
80 °
Montclair, Monday, 24 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high92° (1998)
Record low53° (1971)
Tue, 2581° / 64°0.07
81 °
Montclair, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.07 in
Chance of precipitation22%
Record high94° (1968)
Record low53° (1971)
Wed, 2681° / 64°0.09
81 °
Montclair, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation25%
Record high91° (1993)
Record low54° (1963)
Thu, 2781° / 65°0.16
81 °
Montclair, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.16 in
Chance of precipitation33%
Record high92° (2020)
Record low56° (1969)
Fri, 2881° / 66°0.22
81 °
Montclair, Friday, 28 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.22 in
Chance of precipitation40%
Record high93° (2018)
Record low56° (1968)
Sat, 2980° / 65°0.15
80 °
Montclair, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.15 in
Chance of precipitation35%
Record high92° (2018)
Record low49° (1982)
Sun, 3080° / 65°0.06
80 °
Montclair, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.06 in
Chance of precipitation28%
Record high93° (1973)
Record low49° (1986)
Mon, 3180° / 64°0.06
80 °
Montclair, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.06 in
Chance of precipitation17%
Record high92° (2010)
Record low50° (1965)
Tue, 0178° / 64°0.13
78 °
Montclair, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.13 in
Chance of precipitation32%
Record high93° (2010)
Record low53° (2017)
Wed, 0278° / 63°0.18
78 °
Montclair, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.18 in
Chance of precipitation38%
Record high94° (1980)
Record low53° (1967)
Thu, 0379° / 63°0.13
79 °
Montclair, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.13 in
Chance of precipitation38%
Record high91° (2015)
Record low50° (1967)
Fri, 0479° / 63°0.11
79 °
Montclair, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.11 in
Chance of precipitation30%
Record high91° (2023)
Record low52° (1975)
Sat, 0578° / 63°0.06
78 °
Montclair, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.06 in
Chance of precipitation23%
Record high93° (2023)
Record low53° (1997)
Sun, 0678° / 63°0.2
78 °
Montclair, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.2 in
Chance of precipitation30%
Record high94° (2023)
Record low51° (1984)
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, NJ 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, NJ 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.