Weather in South Acton, MA
South Acton, Saturday, 17 October, 05:07
Light rain. Feels like 46°. High 56°, low 35°.
Monthly outlook for South Acton, MA: average high 56.2°, average low 38.1°. That is 0.4° below the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 26 October (66.9°), the coolest 18 October (33.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 57.8° | 58.2° | -0.2° |
| 27 October – 5 November | 53.5° | 54.8° | -0.7° |
| 6 November – 15 November | at normal | 49.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Groton (12 mi).
0
South Acton, Sunday, 18 October
Clear. High 51°, low 33°.
0
South Acton, Monday, 19 October
Overcast. High 59°, low 37°.
0South Acton, Tuesday, 20 October
Overcast. High 62°, low 41°.
0
South Acton, Wednesday, 21 October
Mostly clear. High 53°, low 41°.
0South Acton, Thursday, 22 October
Mostly clear. High 59°, low 39°.
0South Acton, Friday, 23 October
Clear. High 58°, low 40°.
0South Acton, Saturday, 24 October
Clear. High 54°, low 38°.
0South Acton, Sunday, 25 October
Overcast. High 59°, low 35°.
0South Acton, Monday, 26 October
Overcast. High 67°, low 39°.
0.01South Acton, Tuesday, 27 October
Light rain. High 60°, low 41°.
0South Acton, Wednesday, 28 October
Clear. High 50°, low 35°.
0.1South Acton, Thursday, 29 October
Light rain. High 50°, low 37°.
0.2South Acton, Friday, 30 October
Light rain. High 53°, low 42°.
0South Acton, Saturday, 31 October
Overcast. High 51°, low 39°.
0South Acton, Sunday, 1 November
Overcast. High 56°, low 38°.
0.09
South Acton, Monday, 2 November
Climate normal for this date — 60-year average.
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.
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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