Weather in Acton, MA
Acton, Friday, 9 October, 01:10
Mostly clear. Feels like 49°. High 66°, low 49°.
Monthly outlook for Acton, MA: average high 62.5°, average low 45.7°. That is 1.4° above the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 17 October (74.2°), the coolest 20 October (37.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 64.1° | 60.8° | +1.8° |
| 19 October – 28 October | 59.8° | 57.6° | +1.2° |
| 29 October – 7 November | at normal | 54.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Groton (11 mi).
0
Acton, Saturday, 10 October
Overcast. High 63°, low 45°.
0.04
Acton, Sunday, 11 October
Light rain. High 63°, low 43°.
0.22Acton, Monday, 12 October
Rain. High 65°, low 52°.
0.24Acton, Tuesday, 13 October
Light rain. High 70°, low 52°.
0.46Acton, Wednesday, 14 October
Rain. High 61°, low 49°.
0
Acton, Thursday, 15 October
Partly cloudy. High 60°, low 46°.
0.1Acton, Friday, 16 October
Light rain. High 65°, low 50°.
0.02Acton, Saturday, 17 October
Light rain. High 74°, low 48°.
0
Acton, Sunday, 18 October
Clear. High 53°, low 39°.
0Acton, Monday, 19 October
Overcast. High 58°, low 37°.
0Acton, Tuesday, 20 October
Clear. High 58°, low 37°.
0Acton, Wednesday, 21 October
Light rain. High 61°, low 42°.
0
Acton, Thursday, 22 October
Mostly clear. High 66°, low 49°.
0.02Acton, Friday, 23 October
Light rain. High 63°, low 48°.
0Acton, Saturday, 24 October
Overcast. High 52°, low 44°.
0.14
Acton, Sunday, 25 October
Climate normal for this date — 60-year average.
0.13Acton, Monday, 26 October
Climate normal for this date — 60-year average.
0.12Acton, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.12Acton, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.15Acton, Thursday, 29 October
Climate normal for this date — 60-year average.
0.16Acton, Friday, 30 October
Climate normal for this date — 60-year average.
0.09Acton, Saturday, 31 October
Climate normal for this date — 60-year average.
0.12Acton, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Acton, Monday, 2 November
Climate normal for this date — 60-year average.
0.17Acton, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Acton, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.15Acton, Thursday, 5 November
Climate normal for this date — 60-year average.
0.13Acton, Friday, 6 November
Climate normal for this date — 60-year average.
0.05Acton, Saturday, 7 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 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 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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