As of 19:39 EDT

Weather in Back Bay, MA

83°

Back Bay, Saturday, 8 August, 19:39

Overcast. Feels like 86°. High 88°, low 72°.

Pressure29.88 inHg

Wind6 mph S

Humidity62%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

Monthly outlook for Back Bay, MA: average high 79.6°, average low 64.6°. That is 0.1° above the climate normal for August. Precipitation is expected on 7 days (about 4.9 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 9 August (95.3°), the coolest 14 August (59.1°).

79.6°/64.6°

Average high / low

+0.1°

Above normal

7 / 5

Wet days / normal

4.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	83.2°	80.1°	+1.7°
18 August – 27 August	73.5°	78.1°	-2.6°
28 August – 6 September	at normal	76.4°	—

August records over 66 years

99.9°4 August 2022All-time high

48.4°31 August 1965All-time low

Climate normals and records are computed from the nearest reference point — Boston (2 mi).

Sun, 0995° / 73°

95 °

Back Bay, Sunday, 9 August

Clear. High 95°, low 73°.

Pressure29.88 inHg

Wind10.5 mph W

Humidity38%

Visibility6.2 mi

Dew point61°

Mon, 1091° / 71°

0.06

91 °

Back Bay, Monday, 10 August

Light rain. High 91°, low 71°.

Pressure29.94 inHg

Wind4.5 mph S

Humidity34%

Visibility6.2 mi

Dew point57°

Tue, 1190° / 70°

90 °

Back Bay, Tuesday, 11 August

Mostly clear. High 90°, low 70°.

Pressure29.77 inHg

Wind12.1 mph NW

Humidity33%

Visibility6.2 mi

Dew point55°

Wed, 1274° / 63°

0.55

74 °

Back Bay, Wednesday, 12 August

Rain. High 74°, low 63°.

Pressure29.77 inHg

Wind6.8 mph E

Humidity93%

Visibility6.2 mi

Dew point63°

Thu, 1378° / 62°

0.32

78 °

Back Bay, Thursday, 13 August

Light rain. High 78°, low 62°.

Pressure29.71 inHg

Wind11.7 mph W

Humidity71%

Visibility—

Dew point65°

Fri, 1479° / 59°

79 °

Back Bay, Friday, 14 August

Overcast. High 79°, low 59°.

Pressure29.88 inHg

Wind8.8 mph W

Humidity42%

Visibility—

Dew point45°

Sat, 1576° / 60°

76 °

Back Bay, Saturday, 15 August

Clear. High 76°, low 60°.

Pressure30.09 inHg

Wind7.9 mph NW

Humidity39%

Visibility—

Dew point45°

Sun, 1678° / 59°

78 °

Back Bay, Sunday, 16 August

Clear. High 78°, low 59°.

Pressure30.27 inHg

Wind10.6 mph S

Humidity33%

Visibility—

Dew point42°

Mon, 1783° / 61°

83 °

Back Bay, Monday, 17 August

Overcast. High 83°, low 61°.

Pressure30.21 inHg

Wind10.7 mph SW

Humidity34%

Visibility—

Dew point46°

Tue, 1872° / 66°

1.6

72 °

Back Bay, Tuesday, 18 August

Heavy rain. High 72°, low 66°.

Pressure30.03 inHg

Wind11 mph S

Humidity97%

Visibility—

Dew point65°

Wed, 1975° / 65°

75 °

Back Bay, Wednesday, 19 August

Partly cloudy. High 75°, low 65°.

Pressure29.85 inHg

Wind6.6 mph E

Humidity70%

Visibility—

Dew point63°

Thu, 2074° / 64°

74 °

Back Bay, Thursday, 20 August

Overcast. High 74°, low 64°.

Pressure30.00 inHg

Wind8.1 mph E

Humidity64%

Visibility—

Dew point58°

Fri, 2174° / 62°

0.95

74 °

Back Bay, Friday, 21 August

Heavy rain. High 74°, low 62°.

Pressure30.00 inHg

Wind10.8 mph S

Humidity61%

Visibility—

Dew point58°

Sat, 2274° / 65°

1.31

74 °

Back Bay, Saturday, 22 August

Heavy rain. High 74°, low 65°.

Pressure29.77 inHg

Wind10.5 mph S

Humidity96%

Visibility—

Dew point69°

Sun, 2372° / 59°

72 °

Back Bay, Sunday, 23 August

Clear. High 72°, low 59°.

Pressure29.77 inHg

Wind13.7 mph W

Humidity50%

Visibility—

Dew point47°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2477° / 62°

0.08

77 °

Back Bay, Monday, 24 August

Climate normal for this date — 60-year average.

Average high77°

Average low62°

Average precipitation0.08 in

Chance of precipitation30%

Record high91° (1998)

Record low53° (1971)

Tue, 2578° / 62°

0.1

78 °

Back Bay, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.1 in

Chance of precipitation27%

Record high93° (1969)

Record low54° (1971)

Wed, 2679° / 63°

0.06

79 °

Back Bay, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.06 in

Chance of precipitation17%

Record high93° (2021)

Record low51° (1981)

Thu, 2779° / 64°

0.07

79 °

Back Bay, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high79°

Average low64°

Average precipitation0.07 in

Chance of precipitation30%

Record high95° (1993)

Record low52° (2019)

Fri, 2878° / 64°

0.11

78 °

Back Bay, Friday, 28 August

Climate normal for this date — 60-year average.

Average high78°

Average low64°

Average precipitation0.11 in

Chance of precipitation35%

Record high94° (2018)

Record low54° (1986)

Sat, 2977° / 63°

0.18

77 °

Back Bay, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high77°

Average low63°

Average precipitation0.18 in

Chance of precipitation25%

Record high96° (2018)

Record low49° (1986)

Sun, 3078° / 63°

0.15

78 °

Back Bay, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high78°

Average low63°

Average precipitation0.15 in

Chance of precipitation20%

Record high91° (1973)

Record low49° (1965)

Mon, 3178° / 62°

0.07

78 °

Back Bay, Monday, 31 August

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.07 in

Chance of precipitation23%

Record high91° (2010)

Record low48° (1965)

Tue, 0176° / 61°

0.06

76 °

Back Bay, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high76°

Average low61°

Average precipitation0.06 in

Chance of precipitation22%

Record high92° (2010)

Record low51° (1975)

Wed, 0275° / 61°

0.17

75 °

Back Bay, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high75°

Average low61°

Average precipitation0.17 in

Chance of precipitation25%

Record high93° (2010)

Record low49° (2017)

Thu, 0376° / 61°

0.14

76 °

Back Bay, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high76°

Average low61°

Average precipitation0.14 in

Chance of precipitation33%

Record high94° (2018)

Record low51° (1967)

Fri, 0476° / 61°

0.12

76 °

Back Bay, Friday, 4 September

Climate normal for this date — 60-year average.

Average high76°

Average low61°

Average precipitation0.12 in

Chance of precipitation22%

Record high89° (1973)

Record low52° (1987)

Sat, 0576° / 61°

0.07

76 °

Back Bay, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high76°

Average low61°

Average precipitation0.07 in

Chance of precipitation17%

Record high91° (2018)

Record low51° (1994)

Sun, 0675° / 60°

0.15

75 °

Back Bay, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high75°

Average low60°

Average precipitation0.15 in

Chance of precipitation33%

Record high96° (2018)

Record low50° (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 Back Bay, 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 Back Bay, 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.