Weather in South Acton, MA
South Acton, Sunday, 18 October, 14:50
Clear. Feels like 52°. High 55°, low 30°.
Monthly outlook for South Acton, MA: average high 59.9°, average low 40.7°. That is 1.7° above the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 30 October (72.7°), the coolest 18 October (30°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 57.1° | 57.9° | -0.4° |
| 28 October – 6 November | 64.5° | 54.5° | +5.6° |
| 7 November – 16 November | at normal | 49.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Groton (12 mi).
0
South Acton, Monday, 19 October
Overcast. High 60°, low 37°.
0South Acton, Tuesday, 20 October
Overcast. High 61°, low 40°.
0South Acton, Wednesday, 21 October
Clear. High 56°, low 40°.
0South Acton, Thursday, 22 October
Clear. High 62°, low 39°.
0
South Acton, Friday, 23 October
Mostly clear. High 51°, low 38°.
0South Acton, Saturday, 24 October
Clear. High 53°, low 32°.
0.04
South Acton, Sunday, 25 October
Light rain. High 58°, low 35°.
0.01South Acton, Monday, 26 October
Light rain. High 59°, low 42°.
0South Acton, Tuesday, 27 October
Overcast. High 55°, low 37°.
0South Acton, Wednesday, 28 October
Overcast. High 55°, low 32°.
0.22South Acton, Thursday, 29 October
Light rain. High 63°, low 43°.
0.59South Acton, Friday, 30 October
Rain. High 73°, low 57°.
0
South Acton, Saturday, 31 October
Partly cloudy. High 69°, low 52°.
0.11South Acton, Sunday, 1 November
Light rain. High 69°, low 54°.
0South Acton, Monday, 2 November
Overcast. High 59°, low 45°.
0.17
South Acton, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04South Acton, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.15South Acton, Thursday, 5 November
Climate normal for this date — 60-year average.
0.13South Acton, Friday, 6 November
Climate normal for this date — 60-year average.
0.05South Acton, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09South Acton, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1South Acton, Monday, 9 November
Climate normal for this date — 60-year average.
0.15South Acton, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.11South Acton, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.13South Acton, Thursday, 12 November
Climate normal for this date — 60-year average.
0.15South Acton, Friday, 13 November
Climate normal for this date — 60-year average.
0.12South Acton, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12South Acton, Sunday, 15 November
Climate normal for this date — 60-year average.
0.15South Acton, Monday, 16 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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