Weather in Chelmsford, MA
Chelmsford, Thursday, 15 October, 15:27
Partly cloudy. Feels like 60°. High 62°, low 49°.
Monthly outlook for Chelmsford, MA: average high 56.4°, average low 39°. That is 1.1° below the climate normal for October. Precipitation is expected on 1 day (about 0.7 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 16 October (69.1°), the coolest 25 October (32°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 October – 24 October | 58.6° | 59.8° | -0.7° |
| 25 October – 3 November | 52.9° | 56.2° | -1.8° |
| 4 November – 13 November | at normal | 52° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lowell (3 mi).
0.63
Chelmsford, Friday, 16 October
Heavy rain. High 69°, low 46°.
0Chelmsford, Saturday, 17 October
Partly cloudy. High 59°, low 37°.
0
Chelmsford, Sunday, 18 October
Clear. High 53°, low 33°.
0Chelmsford, Monday, 19 October
Clear. High 65°, low 40°.
0Chelmsford, Tuesday, 20 October
Partly cloudy. High 69°, low 43°.
0Chelmsford, Wednesday, 21 October
Clear. High 58°, low 43°.
0
Chelmsford, Thursday, 22 October
Overcast. High 57°, low 44°.
0.03Chelmsford, Friday, 23 October
Light rain. High 46°, low 38°.
0Chelmsford, Saturday, 24 October
Clear. High 47°, low 34°.
0Chelmsford, Sunday, 25 October
Clear. High 50°, low 32°.
0Chelmsford, Monday, 26 October
Clear. High 59°, low 34°.
0Chelmsford, Tuesday, 27 October
Overcast. High 55°, low 36°.
0Chelmsford, Wednesday, 28 October
Overcast. High 56°, low 39°.
0Chelmsford, Thursday, 29 October
Overcast. High 49°, low 35°.
0.02Chelmsford, Friday, 30 October
Light rain. High 49°, low 42°.
0.09Chelmsford, Saturday, 31 October
Climate normal for this date — 60-year average.
0.11Chelmsford, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Chelmsford, Monday, 2 November
Climate normal for this date — 60-year average.
0.2
Chelmsford, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.05Chelmsford, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.17Chelmsford, Thursday, 5 November
Climate normal for this date — 60-year average.
0.12Chelmsford, Friday, 6 November
Climate normal for this date — 60-year average.
0.05
Chelmsford, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09Chelmsford, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Chelmsford, Monday, 9 November
Climate normal for this date — 60-year average.
0.16Chelmsford, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.11Chelmsford, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.11Chelmsford, Thursday, 12 November
Climate normal for this date — 60-year average.
0.15Chelmsford, Friday, 13 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 Chelmsford, 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 Chelmsford, 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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