Weather in Chelmsford, MA
Chelmsford, Monday, 26 October, 05:38
Clear. Feels like 39°. High 71°, low 38°.
Monthly outlook for Chelmsford, MA: average high 57.6°, average low 40.1°. That is 1.6° above the climate normal for October. Precipitation is expected on 5 days (about 2.6 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 30 October (70.9°), the coolest 4 November (29.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 26 October – 4 November | 60.7° | 55.9° | +2.7° |
| 5 November – 14 November | 52.5° | 51.3° | +0.6° |
| 15 November – 24 November | at normal | 46.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lowell (3 mi).
0
Chelmsford, Tuesday, 27 October
Clear. High 54°, low 34°.
0Chelmsford, Wednesday, 28 October
Clear. High 56°, low 32°.
0Chelmsford, Thursday, 29 October
Clear. High 66°, low 43°.
0Chelmsford, Friday, 30 October
Clear. High 71°, low 52°.
0
Chelmsford, Saturday, 31 October
Mostly clear. High 66°, low 46°.
0
Chelmsford, Sunday, 1 November
Overcast. High 62°, low 42°.
0.22
Chelmsford, Monday, 2 November
Light rain. High 60°, low 54°.
0.08Chelmsford, Tuesday, 3 November
Light rain. High 56°, low 37°.
0Chelmsford, Wednesday, 4 November
Clear. High 46°, low 30°.
0Chelmsford, Thursday, 5 November
Mostly clear. High 52°, low 31°.
0.24Chelmsford, Friday, 6 November
Rain. High 48°, low 34°.
1.48Chelmsford, Saturday, 7 November
Heavy rain. High 55°, low 44°.
0.56Chelmsford, Sunday, 8 November
Rain. High 55°, low 45°.
0Chelmsford, Monday, 9 November
Overcast. High 51°, low 42°.
0Chelmsford, Tuesday, 10 November
Clear. High 55°, low 39°.
0.11
Chelmsford, 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.
0.12
Chelmsford, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12Chelmsford, Sunday, 15 November
Climate normal for this date — 60-year average.
0.15Chelmsford, Monday, 16 November
Climate normal for this date — 60-year average.
0.14Chelmsford, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.07Chelmsford, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.05Chelmsford, Thursday, 19 November
Climate normal for this date — 60-year average.
0.13Chelmsford, Friday, 20 November
Climate normal for this date — 60-year average.
0.13Chelmsford, Saturday, 21 November
Climate normal for this date — 60-year average.
0.14Chelmsford, Sunday, 22 November
Climate normal for this date — 60-year average.
0.13Chelmsford, Monday, 23 November
Climate normal for this date — 60-year average.
0.07Chelmsford, Tuesday, 24 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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