Weather in Chelmsford, MA
Chelmsford, Thursday, 12 November, 14:18
Light rain. Feels like 39°. High 46°, low 41°.
Monthly outlook for Chelmsford, MA: average high 53.1°, average low 37.8°. That is 3.4° above the climate normal for November. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 24 November (66.1°), the coolest 14 November (31°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 November – 21 November | 51.4° | 47.9° | +1.9° |
| 22 November – 1 December | 56° | 45.3° | +6° |
| 2 December – 11 December | at normal | 41° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Lowell (3 mi).
0.17Chelmsford, Friday, 13 November
Rain. High 44°, low 34°.
0
Chelmsford, Saturday, 14 November
Overcast. High 45°, low 31°.
0Chelmsford, Sunday, 15 November
Overcast. High 45°, low 33°.
0
Chelmsford, Monday, 16 November
Mostly clear. High 48°, low 34°.
0Chelmsford, Tuesday, 17 November
Overcast. High 54°, low 32°.
0
Chelmsford, Wednesday, 18 November
Clear. High 58°, low 36°.
0Chelmsford, Thursday, 19 November
Clear. High 58°, low 38°.
0
Chelmsford, Friday, 20 November
Partly cloudy. High 62°, low 41°.
0Chelmsford, Saturday, 21 November
Mostly clear. High 54°, low 35°.
0Chelmsford, Sunday, 22 November
Overcast. High 50°, low 31°.
0Chelmsford, Monday, 23 November
Overcast. High 64°, low 48°.
0Chelmsford, Tuesday, 24 November
Overcast. High 66°, low 49°.
0.23Chelmsford, Wednesday, 25 November
Rain. High 62°, low 54°.
0Chelmsford, Thursday, 26 November
Clear. High 48°, low 35°.
0Chelmsford, Friday, 27 November
Overcast. High 46°, low 32°.
0.18
Chelmsford, Saturday, 28 November
Climate normal for this date — 60-year average.
0.07Chelmsford, Sunday, 29 November
Climate normal for this date — 60-year average.
0.11Chelmsford, Monday, 30 November
Climate normal for this date — 60-year average.
0.11Chelmsford, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.12Chelmsford, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.15Chelmsford, Thursday, 3 December
Climate normal for this date — 60-year average.
0.11Chelmsford, Friday, 4 December
Climate normal for this date — 60-year average.
0.14Chelmsford, Saturday, 5 December
Climate normal for this date — 60-year average.
0.15Chelmsford, Sunday, 6 December
Climate normal for this date — 60-year average.
0.13Chelmsford, Monday, 7 December
Climate normal for this date — 60-year average.
0.09Chelmsford, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.17Chelmsford, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.07Chelmsford, Thursday, 10 December
Climate normal for this date — 60-year average.
0.19Chelmsford, Friday, 11 December
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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