Monthly outlook for Green Harbor, MA: average high 56.1°, average low 43.8°. That is 0.9° below the climate normal for October. Precipitation is expected on 3 days (about 1.6 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 27 October (65.6°), the coolest 4 November (36°).
56.1°/43.8°
Average high / low
−0.9°
Below normal
3 / 5
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
57.8°
58.5°
-0.3°
30 October – 8 November
53.1°
55.4°
-1.3°
9 November – 18 November
at normal
50.9°
—
October records over 66 years
82.6°5 October 2025All-time high
25.3°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Halifax (12 mi).
Wed, 2157° / 41°0
57 °
Green Harbor, Wednesday, 21 October
Overcast. High 57°, low 41°.
Pressure30.21 inHg
Wind19.7 mph NE
Humidity77%
Visibility6.2 mi
Dew point45°
Thu, 2262° / 42°0
62 °
Green Harbor, Thursday, 22 October
Overcast. High 62°, low 42°.
Pressure29.88 inHg
Wind17.7 mph N
Humidity58%
Visibility6.2 mi
Dew point40°
Fri, 2350° / 44°0
50 °
Green Harbor, Friday, 23 October
Overcast. High 50°, low 44°.
Pressure30.30 inHg
Wind16.8 mph N
Humidity54%
Visibility6.2 mi
Dew point30°
Sat, 2453° / 42°0
53 °
Green Harbor, Saturday, 24 October
Clear. High 53°, low 42°.
Pressure30.47 inHg
Wind4.5 mph NW
Humidity48%
Visibility6.2 mi
Dew point31°
Sun, 2562° / 42°0
62 °
Green Harbor, Sunday, 25 October
Clear. High 62°, low 42°.
Pressure30.53 inHg
Wind8.2 mph SW
Humidity46%
Visibility—
Dew point35°
Mon, 2663° / 43°0
63 °
Green Harbor, Monday, 26 October
Clear. High 63°, low 43°.
Pressure30.27 inHg
Wind8.2 mph SW
Humidity55%
Visibility—
Dew point40°
Tue, 2766° / 53°0
66 °
Green Harbor, Tuesday, 27 October
Overcast. High 66°, low 53°.
Pressure30.03 inHg
Wind13.5 mph W
Humidity61%
Visibility—
Dew point46°
Wed, 2850° / 44°0.09
50 °
Green Harbor, Wednesday, 28 October
Light rain. High 50°, low 44°.
Pressure30.33 inHg
Wind22.9 mph NE
Humidity60%
Visibility—
Dew point33°
Thu, 2950° / 45°0
50 °
Green Harbor, Thursday, 29 October
Light rain. High 50°, low 45°.
Pressure30.30 inHg
Wind8.8 mph E
Humidity50%
Visibility—
Dew point31°
Fri, 3054° / 47°0.08
54 °
Green Harbor, Friday, 30 October
Light rain. High 54°, low 47°.
Pressure30.09 inHg
Wind17.3 mph W
Humidity85%
Visibility—
Dew point43°
Sat, 3147° / 41°0
47 °
Green Harbor, Saturday, 31 October
Clear. High 47°, low 41°.
Pressure30.42 inHg
Wind18.7 mph NW
Humidity49%
Visibility—
Dew point26°
Sun, 0158° / 43°0
58 °
Green Harbor, Sunday, 1 November
Overcast. High 58°, low 43°.
Pressure30.53 inHg
Wind14.5 mph S
Humidity62%
Visibility—
Dew point40°
Mon, 0263° / 57°1.42
63 °
Green Harbor, Monday, 2 November
Heavy rain. High 63°, low 57°.
Pressure29.91 inHg
Wind30.4 mph S
Humidity93%
Visibility—
Dew point61°
Tue, 0352° / 41°0
52 °
Green Harbor, Tuesday, 3 November
Clear. High 52°, low 41°.
Pressure29.80 inHg
Wind23.4 mph NW
Humidity54%
Visibility—
Dew point35°
Wed, 0445° / 36°0
45 °
Green Harbor, Wednesday, 4 November
Clear. High 45°, low 36°.
Pressure30.06 inHg
Wind18.7 mph NW
Humidity51%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0555° / 43°0.16
55 °
Green Harbor, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.16 in
Chance of precipitation35%
Record high73° (2022)
Record low31° (1965)
Fri, 0654° / 43°0.15
54 °
Green Harbor, Friday, 6 November
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.15 in
Chance of precipitation38%
Record high74° (2022)
Record low31° (2012)
Sat, 0754° / 42°0.06
54 °
Green Harbor, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.06 in
Chance of precipitation30%
Record high75° (2022)
Record low30° (1962)
Sun, 0853° / 40°0.13
53 °
Green Harbor, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.13 in
Chance of precipitation32%
Record high70° (2020)
Record low28° (2019)
Mon, 0953° / 40°0.12
53 °
Green Harbor, Monday, 9 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.12 in
Chance of precipitation32%
Record high70° (2020)
Record low23° (2019)
Tue, 1053° / 41°0.18
53 °
Green Harbor, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.18 in
Chance of precipitation40%
Record high70° (2020)
Record low25° (2017)
Wed, 1153° / 41°0.14
53 °
Green Harbor, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.14 in
Chance of precipitation38%
Record high71° (2022)
Record low22° (2017)
Thu, 1251° / 39°0.15
51 °
Green Harbor, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.15 in
Chance of precipitation35%
Record high73° (2022)
Record low25° (2017)
Fri, 1350° / 38°0.2
50 °
Green Harbor, Friday, 13 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.2 in
Chance of precipitation45%
Record high67° (1964)
Record low19° (2019)
Sat, 1449° / 38°0.13
49 °
Green Harbor, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.13 in
Chance of precipitation27%
Record high66° (1993)
Record low19° (2019)
Sun, 1551° / 38°0.12
51 °
Green Harbor, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.12 in
Chance of precipitation37%
Record high72° (1993)
Record low22° (2018)
Mon, 1650° / 38°0.17
50 °
Green Harbor, Monday, 16 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.17 in
Chance of precipitation30%
Record high68° (2001)
Record low22° (1967)
Tue, 1749° / 37°0.15
49 °
Green Harbor, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.15 in
Chance of precipitation28%
Record high65° (2006)
Record low24° (1967)
Wed, 1850° / 37°0.08
50 °
Green Harbor, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.08 in
Chance of precipitation22%
Record high67° (1987)
Record low25° (2020)
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 Green 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 Green 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.