Weather in Rock Harbor, MA
Rock Harbor, Sunday, 15 November, 14:28
Overcast. Feels like 43°. High 48°, low 34°.
Monthly outlook for Rock Harbor, MA: average high 51.6°, average low 44.6°. That is 1.8° above the climate normal for November. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 29 November (57.2°), the coolest 15 November (34.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 52.6° | 48.7° | +2.1° |
| 25 November – 4 December | 49.9° | 47.3° | +1.5° |
| 5 December – 14 December | at normal | 44° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Chatham (9 mi).
0Rock Harbor, Monday, 16 November
Overcast. High 45°, low 39°.
0
Rock Harbor, Tuesday, 17 November
Clear. High 51°, low 38°.
0
Rock Harbor, Wednesday, 18 November
Mostly clear. High 56°, low 48°.
0Rock Harbor, Thursday, 19 November
Mostly clear. High 55°, low 50°.
0Rock Harbor, Friday, 20 November
Clear. High 56°, low 50°.
0Rock Harbor, Saturday, 21 November
Clear. High 54°, low 49°.
0Rock Harbor, Sunday, 22 November
Overcast. High 56°, low 49°.
0Rock Harbor, Monday, 23 November
Overcast. High 54°, low 50°.
0.04
Rock Harbor, Tuesday, 24 November
Light rain. High 50°, low 44°.
0Rock Harbor, Wednesday, 25 November
Clear. High 45°, low 42°.
0
Rock Harbor, Thursday, 26 November
Partly cloudy. High 48°, low 41°.
0Rock Harbor, Friday, 27 November
Mostly clear. High 51°, low 46°.
0.22Rock Harbor, Saturday, 28 November
Rain. High 57°, low 50°.
0.45Rock Harbor, Sunday, 29 November
Rain. High 57°, low 44°.
0Rock Harbor, Monday, 30 November
Overcast. High 42°, low 38°.
0.13
Rock Harbor, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.16Rock Harbor, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.18Rock Harbor, Thursday, 3 December
Climate normal for this date — 60-year average.
0.13Rock Harbor, Friday, 4 December
Climate normal for this date — 60-year average.
0.19Rock Harbor, Saturday, 5 December
Climate normal for this date — 60-year average.
0.21Rock Harbor, Sunday, 6 December
Climate normal for this date — 60-year average.
0.19Rock Harbor, Monday, 7 December
Climate normal for this date — 60-year average.
0.11Rock Harbor, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.21Rock Harbor, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.12Rock Harbor, Thursday, 10 December
Climate normal for this date — 60-year average.
0.21Rock Harbor, Friday, 11 December
Climate normal for this date — 60-year average.
0.17Rock Harbor, Saturday, 12 December
Climate normal for this date — 60-year average.
0.11Rock Harbor, Sunday, 13 December
Climate normal for this date — 60-year average.
0.17Rock Harbor, Monday, 14 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 Rock Harbor, 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 Rock Harbor, 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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