Monthly outlook for Canton, MA: average high 79.1°, average low 63.1°. That is 0.6° above the climate normal for August. Precipitation is expected on 7 days (about 5.2 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 9 August (93.9°), the coolest 23 August (56.9°).
79.1°/63.1°
Average high / low
+0.6°
Above normal
7 / 5
Wet days / normal
5.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.8°
78.7°
+2.3°
18 August – 27 August
72.9°
76.8°
-2.2°
28 August – 6 September
at normal
75.1°
—
August records over 66 years
97.2°4 August 2022All-time high
49.1°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Quincy (8 mi).
Sun, 0994° / 72°0.01
94 °
Canton, Sunday, 9 August
Light rain. High 94°, low 72°.
Pressure29.88 inHg
Wind10.5 mph W
Humidity40%
Visibility6.2 mi
Dew point63°
Mon, 1091° / 70°0.06
91 °
Canton, Monday, 10 August
Light rain. High 91°, low 70°.
Pressure29.94 inHg
Wind7.2 mph SW
Humidity35%
Visibility6.2 mi
Dew point57°
Tue, 1189° / 68°0
89 °
Canton, Tuesday, 11 August
Partly cloudy. High 89°, low 68°.
Pressure29.80 inHg
Wind11.9 mph W
Humidity35%
Visibility6.2 mi
Dew point56°
Wed, 1272° / 62°0.64
72 °
Canton, Wednesday, 12 August
Rain. High 72°, low 62°.
Pressure29.77 inHg
Wind6.3 mph E
Humidity95%
Visibility6.2 mi
Dew point63°
Thu, 1379° / 59°0.31
79 °
Canton, Thursday, 13 August
Light rain. High 79°, low 59°.
Pressure29.71 inHg
Wind9 mph W
Humidity65%
Visibility—
Dew point64°
Fri, 1477° / 57°0
77 °
Canton, Friday, 14 August
Overcast. High 77°, low 57°.
Pressure29.88 inHg
Wind9 mph W
Humidity43%
Visibility—
Dew point45°
Sat, 1576° / 59°0
76 °
Canton, Saturday, 15 August
Clear. High 76°, low 59°.
Pressure30.09 inHg
Wind7.7 mph NW
Humidity41%
Visibility—
Dew point45°
Sun, 1679° / 57°0
79 °
Canton, Sunday, 16 August
Clear. High 79°, low 57°.
Pressure30.27 inHg
Wind10.2 mph S
Humidity36%
Visibility—
Dew point43°
Mon, 1782° / 59°0
82 °
Canton, Monday, 17 August
Overcast. High 82°, low 59°.
Pressure30.21 inHg
Wind10.2 mph S
Humidity37%
Visibility—
Dew point47°
Tue, 1868° / 65°1.68
68 °
Canton, Tuesday, 18 August
Heavy rain. High 68°, low 65°.
Pressure30.03 inHg
Wind9.8 mph S
Humidity96%
Visibility—
Dew point65°
Wed, 1975° / 64°0.02
75 °
Canton, Wednesday, 19 August
Light rain. High 75°, low 64°.
Pressure29.85 inHg
Wind6.7 mph E
Humidity68%
Visibility—
Dew point62°
Thu, 2075° / 62°0.02
75 °
Canton, Thursday, 20 August
Light rain. High 75°, low 62°.
Pressure30.00 inHg
Wind7.9 mph E
Humidity68%
Visibility—
Dew point59°
Fri, 2173° / 61°0.91
73 °
Canton, Friday, 21 August
Heavy rain. High 73°, low 61°.
Pressure30.00 inHg
Wind9.1 mph S
Humidity63%
Visibility—
Dew point58°
Sat, 2275° / 65°1.42
75 °
Canton, Saturday, 22 August
Heavy rain. High 75°, low 65°.
Pressure29.77 inHg
Wind11 mph S
Humidity92%
Visibility—
Dew point68°
Sun, 2371° / 57°0
71 °
Canton, Sunday, 23 August
Mostly clear. High 71°, low 57°.
Pressure29.80 inHg
Wind14 mph W
Humidity52%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2476° / 62°0.08
76 °
Canton, Monday, 24 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.08 in
Chance of precipitation30%
Record high89° (1998)
Record low53° (1971)
Tue, 2576° / 63°0.09
76 °
Canton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.09 in
Chance of precipitation28%
Record high92° (1969)
Record low54° (1971)
Wed, 2678° / 63°0.06
78 °
Canton, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.06 in
Chance of precipitation15%
Record high90° (2021)
Record low51° (1981)
Thu, 2777° / 64°0.07
77 °
Canton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.07 in
Chance of precipitation28%
Record high92° (1993)
Record low52° (2019)
Fri, 2877° / 64°0.11
77 °
Canton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.11 in
Chance of precipitation35%
Record high93° (2018)
Record low55° (1986)
Sat, 2976° / 63°0.17
76 °
Canton, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.17 in
Chance of precipitation25%
Record high95° (2018)
Record low49° (1982)
Sun, 3077° / 63°0.15
77 °
Canton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.15 in
Chance of precipitation22%
Record high89° (1973)
Record low49° (1965)
Mon, 3176° / 62°0.07
76 °
Canton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.07 in
Chance of precipitation23%
Record high89° (2010)
Record low49° (1965)
Tue, 0175° / 62°0.06
75 °
Canton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high90° (2010)
Record low52° (1975)
Wed, 0274° / 61°0.17
74 °
Canton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.17 in
Chance of precipitation25%
Record high91° (2010)
Record low51° (2017)
Thu, 0374° / 61°0.14
74 °
Canton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.14 in
Chance of precipitation33%
Record high93° (2018)
Record low51° (1967)
Fri, 0475° / 61°0.12
75 °
Canton, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.12 in
Chance of precipitation22%
Record high87° (1973)
Record low52° (1987)
Sat, 0574° / 61°0.07
74 °
Canton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.07 in
Chance of precipitation17%
Record high89° (2018)
Record low50° (1994)
Sun, 0674° / 61°0.15
74 °
Canton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.15 in
Chance of precipitation35%
Record high94° (2018)
Record low49° (1965)
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 Canton, MA 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 Canton, MA 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.