Monthly outlook for Rock Harbor, MA: average high 55.3°, average low 47.1°. That is 0.6° above the climate normal for October. Precipitation is expected on 6 days (about 3.6 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 26 October (66.5°), the coolest 28 October (31.3°).
55.3°/47.1°
Average high / low
+0.6°
Above normal
6 / 5
Wet days / normal
3.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
26 October – 4 November
57.7°
54.9°
+1.5°
5 November – 14 November
51.3°
52.2°
-0.5°
15 November – 24 November
at normal
48.7°
—
October records over 66 years
77.2°2 October 2019All-time high
34.9°23 October 1969All-time low
Climate normals and records are computed from the nearest reference point — Chatham (9 mi).
Tue, 2754° / 34°0
54 °
Rock Harbor, Tuesday, 27 October
Mostly clear. High 54°, low 34°.
Pressure30.36 inHg
Wind16.6 mph N
Humidity70%
Visibility6.2 mi
Dew point39°
Wed, 2853° / 31°0
53 °
Rock Harbor, Wednesday, 28 October
Clear. High 53°, low 31°.
Pressure30.47 inHg
Wind7 mph W
Humidity64%
Visibility6.2 mi
Dew point37°
Thu, 2959° / 52°0
59 °
Rock Harbor, Thursday, 29 October
Mostly clear. High 59°, low 52°.
Pressure30.24 inHg
Wind13.5 mph SW
Humidity70%
Visibility6.2 mi
Dew point49°
Fri, 3062° / 57°0
62 °
Rock Harbor, Friday, 30 October
Mostly clear. High 62°, low 57°.
Pressure30.03 inHg
Wind17.4 mph NW
Humidity83%
Visibility—
Dew point54°
Sat, 3156° / 52°0
56 °
Rock Harbor, Saturday, 31 October
Mostly clear. High 56°, low 52°.
Pressure30.33 inHg
Wind20 mph N
Humidity75%
Visibility—
Dew point45°
Sun, 0155° / 50°0
55 °
Rock Harbor, Sunday, 1 November
Overcast. High 55°, low 50°.
Pressure30.45 inHg
Wind12.3 mph SW
Humidity62%
Visibility—
Dew point41°
Mon, 0257° / 53°0
57 °
Rock Harbor, Monday, 2 November
Overcast. High 57°, low 53°.
Pressure30.30 inHg
Wind10 mph SW
Humidity77%
Visibility—
Dew point50°
Tue, 0358° / 53°0
58 °
Rock Harbor, Tuesday, 3 November
Overcast. High 58°, low 53°.
Pressure30.30 inHg
Wind18.3 mph E
Humidity76%
Visibility—
Dew point50°
Wed, 0455° / 53°0.24
55 °
Rock Harbor, Wednesday, 4 November
Rain. High 55°, low 53°.
Pressure30.15 inHg
Wind25.2 mph E
Humidity84%
Visibility—
Dew point50°
Thu, 0554° / 50°1.7
54 °
Rock Harbor, Thursday, 5 November
Heavy rain. High 54°, low 50°.
Pressure29.62 inHg
Wind23.8 mph E
Humidity97%
Visibility—
Dew point53°
Fri, 0655° / 51°0
55 °
Rock Harbor, Friday, 6 November
Light rain. High 55°, low 51°.
Pressure29.74 inHg
Wind15.7 mph NW
Humidity74%
Visibility—
Dew point45°
Sat, 0754° / 51°0.45
54 °
Rock Harbor, Saturday, 7 November
Rain. High 54°, low 51°.
Pressure29.62 inHg
Wind17.8 mph NE
Humidity96%
Visibility—
Dew point51°
Sun, 0855° / 44°0.41
55 °
Rock Harbor, Sunday, 8 November
Rain. High 55°, low 44°.
Pressure29.44 inHg
Wind35.3 mph N
Humidity75%
Visibility—
Dew point47°
Mon, 0944° / 41°0.61
44 °
Rock Harbor, Monday, 9 November
Rain. High 44°, low 41°.
Pressure29.62 inHg
Wind30.2 mph NW
Humidity96%
Visibility—
Dew point42°
Tue, 1046° / 43°0.15
46 °
Rock Harbor, Tuesday, 10 November
Light rain. High 46°, low 43°.
Pressure29.85 inHg
Wind23.7 mph N
Humidity82%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 1152° / 45°0.13
52 °
Rock Harbor, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.13 in
Chance of precipitation42%
Record high66° (2020)
Record low30° (2017)
Thu, 1251° / 44°0.17
51 °
Rock Harbor, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.17 in
Chance of precipitation35%
Record high71° (2022)
Record low30° (2017)
Fri, 1350° / 43°0.22
50 °
Rock Harbor, Friday, 13 November
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.22 in
Chance of precipitation40%
Record high60° (1975)
Record low23° (2019)
Sat, 1449° / 43°0.11
49 °
Rock Harbor, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low43°
Average precipitation0.11 in
Chance of precipitation32%
Record high60° (1975)
Record low26° (1986)
Sun, 1551° / 43°0.11
51 °
Rock Harbor, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high51°
Average low43°
Average precipitation0.11 in
Chance of precipitation35%
Record high62° (2008)
Record low31° (2018)
Mon, 1650° / 43°0.17
50 °
Rock Harbor, Monday, 16 November
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.17 in
Chance of precipitation35%
Record high62° (1989)
Record low31° (1967)
Tue, 1749° / 42°0.17
49 °
Rock Harbor, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.17 in
Chance of precipitation30%
Record high62° (2006)
Record low31° (1967)
Wed, 1849° / 42°0.1
49 °
Rock Harbor, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.1 in
Chance of precipitation22%
Record high62° (2021)
Record low33° (2020)
Thu, 1949° / 41°0.07
49 °
Rock Harbor, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.07 in
Chance of precipitation18%
Record high61° (2017)
Record low29° (2020)
Fri, 2049° / 42°0.1
49 °
Rock Harbor, Friday, 20 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.1 in
Chance of precipitation32%
Record high59° (1985)
Record low28° (2008)
Sat, 2148° / 40°0.1
48 °
Rock Harbor, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high48°
Average low40°
Average precipitation0.1 in
Chance of precipitation37%
Record high60° (2020)
Record low23° (1987)
Sun, 2248° / 41°0.22
48 °
Rock Harbor, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high48°
Average low41°
Average precipitation0.22 in
Chance of precipitation43%
Record high59° (1994)
Record low19° (2018)
Mon, 2347° / 40°0.17
47 °
Rock Harbor, Monday, 23 November
Climate normal for this date — 60-year average.
Average high47°
Average low40°
Average precipitation0.17 in
Chance of precipitation25%
Record high59° (2020)
Record low23° (2018)
Tue, 2447° / 40°0.14
47 °
Rock Harbor, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high47°
Average low40°
Average precipitation0.14 in
Chance of precipitation33%
Record high59° (2014)
Record low25° (1989)
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.