As of 22:17 EDT

Weather in South Acton, MA

57°Current weather

South Acton, Monday, 26 October, 22:17

Mostly clear. Feels like 55°. High 69°, low 35°.

Pressure30.09 inHg
Wind3.4 mph N
Humidity64%
Visibility6.2 mi
Dew point45°

Monthly outlook for South Acton, MA: average high 57.5°, average low 38.4°. That is 2° above the climate normal for October. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 26 October (69.2°), the coolest 28 October (23.2°).

57.5°/38.4°
Average high / low
+2°
Above normal
3 / 5
Wet days / normal
0.8 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
26 October – 4 November59.5°55.1°+2.5°
5 November – 14 November54.2°50.4°+2.1°
15 November – 24 Novemberat normal45.8°—

October records over 66 years

85.8°5 October 2007All-time high
23.4°31 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Groton (12 mi).

Tue, 2755° / 31°0Mostly clear
55 °Mostly clear

South Acton, Tuesday, 27 October

Mostly clear. High 55°, low 31°.

Pressure30.39 inHg
Wind3.1 mph N
Humidity52%
Visibility6.2 mi
Dew point30°
Wed, 2857° / 23°0Overcast
57 °Overcast

South Acton, Wednesday, 28 October

Overcast. High 57°, low 23°.

Pressure30.47 inHg
Wind1.7 mph S
Humidity50%
Visibility6.2 mi
Dew point32°
Thu, 2965° / 43°0Clear
65 °Clear

South Acton, Thursday, 29 October

Clear. High 65°, low 43°.

Pressure30.18 inHg
Wind10.3 mph SW
Humidity61%
Visibility6.2 mi
Dew point48°
Fri, 3069° / 49°0.01Light rain
69 °Light rain

South Acton, Friday, 30 October

Light rain. High 69°, low 49°.

Pressure30.00 inHg
Wind10.4 mph W
Humidity56%
Visibility6.2 mi
Dew point50°
Sat, 3158° / 42°0Overcast
58 °Overcast

South Acton, Saturday, 31 October

Overcast. High 58°, low 42°.

Pressure30.33 inHg
Wind10 mph NW
Humidity47%
Visibility—
Dew point32°
Sun, 0161° / 37°0Overcast
61 °Overcast

South Acton, Sunday, 1 November

Overcast. High 61°, low 37°.

Pressure30.39 inHg
Wind8 mph S
Humidity66%
Visibility—
Dew point42°
Mon, 0254° / 48°0.26Light rain
54 °Light rain

South Acton, Monday, 2 November

Light rain. High 54°, low 48°.

Pressure30.09 inHg
Wind4.4 mph S
Humidity95%
Visibility—
Dew point51°
Tue, 0355° / 39°0.02Light rain
55 °Light rain

South Acton, Tuesday, 3 November

Light rain. High 55°, low 39°.

Pressure30.24 inHg
Wind13.5 mph NE
Humidity66%
Visibility—
Dew point37°
Wed, 0452° / 32°0Mostly clear
52 °Mostly clear

South Acton, Wednesday, 4 November

Mostly clear. High 52°, low 32°.

Pressure30.45 inHg
Wind6.6 mph E
Humidity57%
Visibility—
Dew point31°
Thu, 0561° / 43°0.22Light rain
61 °Light rain

South Acton, Thursday, 5 November

Light rain. High 61°, low 43°.

Pressure30.09 inHg
Wind11.2 mph SE
Humidity84%
Visibility—
Dew point47°
Fri, 0664° / 47°0.32Rain
64 °Rain

South Acton, Friday, 6 November

Rain. High 64°, low 47°.

Pressure29.59 inHg
Wind10.8 mph SE
Humidity87%
Visibility—
Dew point58°
Sat, 0750° / 39°0Clear
50 °Clear

South Acton, Saturday, 7 November

Clear. High 50°, low 39°.

Pressure29.71 inHg
Wind9.5 mph SW
Humidity46%
Visibility—
Dew point26°
Sun, 0846° / 35°0Clear
46 °Clear

South Acton, Sunday, 8 November

Clear. High 46°, low 35°.

Pressure29.88 inHg
Wind8.9 mph W
Humidity52%
Visibility—
Dew point28°
Mon, 0946° / 31°0Clear
46 °Clear

South Acton, Monday, 9 November

Clear. High 46°, low 31°.

Pressure30.06 inHg
Wind6.9 mph NW
Humidity50%
Visibility—
Dew point23°
Tue, 1058° / 39°0Light rain
58 °Light rain

South Acton, Tuesday, 10 November

Light rain. High 58°, low 39°.

Pressure29.94 inHg
Wind11.9 mph S
Humidity70%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 1150° / 37°0.11Climate normal
50 °Climate normal

South Acton, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.11 in
Chance of precipitation32%
Record high72° (2020)
Record low20° (2017)
Thu, 1249° / 36°0.13Climate normal
49 °Climate normal

South Acton, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high49°
Average low36°
Average precipitation0.13 in
Chance of precipitation37%
Record high72° (2022)
Record low23° (1976)
Fri, 1347° / 34°0.15Climate normal
47 °Climate normal

South Acton, Friday, 13 November

Climate normal for this date — 60-year average.

Average high47°
Average low34°
Average precipitation0.15 in
Chance of precipitation38%
Record high68° (1964)
Record low16° (2019)
Sat, 1447° / 34°0.12Climate normal
47 °Climate normal

South Acton, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high47°
Average low34°
Average precipitation0.12 in
Chance of precipitation25%
Record high65° (1973)
Record low9° (1986)
Sun, 1548° / 34°0.12Climate normal
48 °Climate normal

South Acton, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high48°
Average low34°
Average precipitation0.12 in
Chance of precipitation37%
Record high72° (1993)
Record low19° (1967)
Mon, 1648° / 34°0.15Climate normal
48 °Climate normal

South Acton, Monday, 16 November

Climate normal for this date — 60-year average.

Average high48°
Average low34°
Average precipitation0.15 in
Chance of precipitation25%
Record high66° (2005)
Record low13° (1967)
Tue, 1747° / 32°0.13Climate normal
47 °Climate normal

South Acton, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high47°
Average low32°
Average precipitation0.13 in
Chance of precipitation30%
Record high64° (2006)
Record low11° (1972)
Wed, 1847° / 33°0.07Climate normal
47 °Climate normal

South Acton, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high47°
Average low33°
Average precipitation0.07 in
Chance of precipitation23%
Record high66° (1963)
Record low23° (2020)
Thu, 1946° / 32°0.06Climate normal
46 °Climate normal

South Acton, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high46°
Average low32°
Average precipitation0.06 in
Chance of precipitation18%
Record high64° (1991)
Record low13° (1986)
Fri, 2046° / 32°0.12Climate normal
46 °Climate normal

South Acton, Friday, 20 November

Climate normal for this date — 60-year average.

Average high46°
Average low32°
Average precipitation0.12 in
Chance of precipitation33%
Record high68° (1991)
Record low7° (1986)
Sat, 2145° / 31°0.12Climate normal
45 °Climate normal

South Acton, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high45°
Average low31°
Average precipitation0.12 in
Chance of precipitation32%
Record high60° (1991)
Record low15° (1967)
Sun, 2244° / 31°0.15Climate normal
44 °Climate normal

South Acton, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high44°
Average low31°
Average precipitation0.15 in
Chance of precipitation38%
Record high62° (1999)
Record low4° (2018)
Mon, 2344° / 30°0.14Climate normal
44 °Climate normal

South Acton, Monday, 23 November

Climate normal for this date — 60-year average.

Average high44°
Average low30°
Average precipitation0.14 in
Chance of precipitation25%
Record high66° (1999)
Record low6° (2018)
Tue, 2444° / 31°0.07Climate normal
44 °Climate normal

South Acton, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high44°
Average low31°
Average precipitation0.07 in
Chance of precipitation28%
Record high66° (1979)
Record low3° (1989)

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 South Acton, 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 South Acton, 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.