Weather in Chelsea, MA
Chelsea, Wednesday, 21 October, 00:10
Clear. Feels like 47°. High 58°, low 40°.
Monthly outlook for Chelsea, MA: average high 55.8°, average low 40.6°. That is 0.9° below the climate normal for October. Precipitation is expected on 2 days (about 1.3 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 27 October (68.4°), the coolest 24 October (34.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 57.9° | 58° | -0.1° |
| 31 October – 9 November | 52.2° | 54.9° | -1.5° |
| 10 November – 19 November | at normal | 49.8° | — |
October records over 66 years
0
Chelsea, Thursday, 22 October
Overcast. High 64°, low 42°.
0
Chelsea, Friday, 23 October
Mostly clear. High 51°, low 38°.
0
Chelsea, Saturday, 24 October
Clear. High 55°, low 34°.
0Chelsea, Sunday, 25 October
Clear. High 62°, low 37°.
0Chelsea, Monday, 26 October
Clear. High 65°, low 40°.
0Chelsea, Tuesday, 27 October
Overcast. High 68°, low 53°.
0.04
Chelsea, Wednesday, 28 October
Light rain. High 48°, low 42°.
0Chelsea, Thursday, 29 October
Overcast. High 52°, low 42°.
0.05Chelsea, Friday, 30 October
Light rain. High 55°, low 45°.
0Chelsea, Saturday, 31 October
Clear. High 50°, low 38°.
0Chelsea, Sunday, 1 November
Overcast. High 59°, low 39°.
1.25Chelsea, Monday, 2 November
Rain. High 63°, low 50°.
0Chelsea, Tuesday, 3 November
Mostly clear. High 51°, low 39°.
0Chelsea, Wednesday, 4 November
Clear. High 46°, low 35°.
0Chelsea, Thursday, 5 November
Clear. High 45°, low 35°.
0.13
Chelsea, Friday, 6 November
Climate normal for this date — 60-year average.
0.06
Chelsea, Saturday, 7 November
Climate normal for this date — 60-year average.
0.1Chelsea, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11Chelsea, Monday, 9 November
Climate normal for this date — 60-year average.
0.16Chelsea, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.13Chelsea, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.14Chelsea, Thursday, 12 November
Climate normal for this date — 60-year average.
0.17Chelsea, Friday, 13 November
Climate normal for this date — 60-year average.
0.13Chelsea, Saturday, 14 November
Climate normal for this date — 60-year average.
0.13Chelsea, Sunday, 15 November
Climate normal for this date — 60-year average.
0.15Chelsea, Monday, 16 November
Climate normal for this date — 60-year average.
0.15Chelsea, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.07Chelsea, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.06Chelsea, Thursday, 19 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 Chelsea, 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 Chelsea, 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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