Monthly outlook for Chappaquiddick, MA: average high 55.9°, average low 48.3°. That is 0.5° below the climate normal for October. 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 20 October (61.3°), the coolest 29 October (42.2°).
55.9°/48.3°
Average high / low
−0.5°
Below normal
3 / 5
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
56.6°
57.6°
-0.5°
30 October – 8 November
54.7°
55.2°
-0.3°
9 November – 18 November
at normal
51.9°
—
October records over 66 years
76.3°5 October 2025All-time high
34.5°24 October 1969All-time low
Climate normals and records are computed from the nearest reference point — Edgartown (2 mi).
Wed, 2156° / 49°0.07
56 °
Chappaquiddick, Wednesday, 21 October
Light rain. High 56°, low 49°.
Pressure30.12 inHg
Wind24.8 mph NE
Humidity68%
Visibility6.2 mi
Dew point45°
Thu, 2260° / 50°0.24
60 °
Chappaquiddick, Thursday, 22 October
Rain. High 60°, low 50°.
Pressure29.83 inHg
Wind17.9 mph N
Humidity55%
Visibility6.2 mi
Dew point40°
Fri, 2350° / 43°0
50 °
Chappaquiddick, Friday, 23 October
Mostly clear. High 50°, low 43°.
Pressure30.21 inHg
Wind15 mph N
Humidity54%
Visibility6.2 mi
Dew point31°
Sat, 2452° / 42°0
52 °
Chappaquiddick, Saturday, 24 October
Clear. High 52°, low 42°.
Pressure30.50 inHg
Wind11.1 mph N
Humidity55%
Visibility—
Dew point33°
Sun, 2558° / 44°0
58 °
Chappaquiddick, Sunday, 25 October
Clear. High 58°, low 44°.
Pressure30.53 inHg
Wind9.4 mph SW
Humidity61%
Visibility—
Dew point41°
Mon, 2659° / 56°0
59 °
Chappaquiddick, Monday, 26 October
Overcast. High 59°, low 56°.
Pressure30.30 inHg
Wind17 mph SW
Humidity79%
Visibility—
Dew point52°
Tue, 2761° / 59°0
61 °
Chappaquiddick, Tuesday, 27 October
Overcast. High 61°, low 59°.
Pressure30.03 inHg
Wind22.6 mph SW
Humidity80%
Visibility—
Dew point54°
Wed, 2858° / 47°0
58 °
Chappaquiddick, Wednesday, 28 October
Overcast. High 58°, low 47°.
Pressure30.06 inHg
Wind22.3 mph NW
Humidity55%
Visibility—
Dew point32°
Thu, 2952° / 42°0
52 °
Chappaquiddick, Thursday, 29 October
Overcast. High 52°, low 42°.
Pressure30.15 inHg
Wind24.4 mph SW
Humidity53%
Visibility—
Dew point30°
Fri, 3056° / 51°0
56 °
Chappaquiddick, Friday, 30 October
Overcast. High 56°, low 51°.
Pressure30.12 inHg
Wind22.9 mph W
Humidity56%
Visibility—
Dew point37°
Sat, 3156° / 54°0
56 °
Chappaquiddick, Saturday, 31 October
Overcast. High 56°, low 54°.
Pressure30.12 inHg
Wind14.8 mph W
Humidity52%
Visibility—
Dew point38°
Sun, 0154° / 47°0
54 °
Chappaquiddick, Sunday, 1 November
Mostly clear. High 54°, low 47°.
Pressure30.09 inHg
Wind17.1 mph NW
Humidity62%
Visibility—
Dew point38°
Mon, 0251° / 44°0
51 °
Chappaquiddick, Monday, 2 November
Clear. High 51°, low 44°.
Pressure30.21 inHg
Wind15.5 mph NW
Humidity52%
Visibility—
Dew point28°
Tue, 0352° / 47°0
52 °
Chappaquiddick, Tuesday, 3 November
Partly cloudy. High 52°, low 47°.
Pressure30.27 inHg
Wind15.6 mph E
Humidity58%
Visibility—
Dew point34°
Wed, 0460° / 53°0.38
60 °
Chappaquiddick, Wednesday, 4 November
Rain. High 60°, low 53°.
Pressure29.88 inHg
Wind39 mph E
Humidity90%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0555° / 48°0.17
55 °
Chappaquiddick, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high55°
Average low48°
Average precipitation0.17 in
Chance of precipitation38%
Record high69° (2022)
Record low35° (1965)
Fri, 0655° / 48°0.15
55 °
Chappaquiddick, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low48°
Average precipitation0.15 in
Chance of precipitation43%
Record high70° (2022)
Record low37° (2012)
Sat, 0755° / 47°0.08
55 °
Chappaquiddick, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low47°
Average precipitation0.08 in
Chance of precipitation30%
Record high69° (2024)
Record low35° (1962)
Sun, 0854° / 45°0.15
54 °
Chappaquiddick, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low45°
Average precipitation0.15 in
Chance of precipitation28%
Record high68° (2020)
Record low32° (2019)
Mon, 0953° / 46°0.11
53 °
Chappaquiddick, Monday, 9 November
Climate normal for this date — 60-year average.
Average high53°
Average low46°
Average precipitation0.11 in
Chance of precipitation30%
Record high65° (2020)
Record low30° (2019)
Tue, 1054° / 46°0.21
54 °
Chappaquiddick, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high54°
Average low46°
Average precipitation0.21 in
Chance of precipitation43%
Record high64° (2020)
Record low29° (2017)
Wed, 1153° / 46°0.13
53 °
Chappaquiddick, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low46°
Average precipitation0.13 in
Chance of precipitation40%
Record high68° (2022)
Record low27° (2017)
Thu, 1252° / 44°0.18
52 °
Chappaquiddick, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.18 in
Chance of precipitation35%
Record high69° (2022)
Record low30° (2017)
Fri, 1351° / 43°0.23
51 °
Chappaquiddick, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low43°
Average precipitation0.23 in
Chance of precipitation45%
Record high62° (1975)
Record low23° (2019)
Sat, 1451° / 44°0.12
51 °
Chappaquiddick, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.12 in
Chance of precipitation25%
Record high60° (2009)
Record low25° (2019)
Sun, 1552° / 44°0.11
52 °
Chappaquiddick, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.11 in
Chance of precipitation32%
Record high63° (2008)
Record low27° (1967)
Mon, 1651° / 43°0.15
51 °
Chappaquiddick, Monday, 16 November
Climate normal for this date — 60-year average.
Average high51°
Average low43°
Average precipitation0.15 in
Chance of precipitation35%
Record high64° (1989)
Record low28° (1967)
Tue, 1750° / 42°0.18
50 °
Chappaquiddick, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low42°
Average precipitation0.18 in
Chance of precipitation30%
Record high64° (2006)
Record low32° (1980)
Wed, 1851° / 43°0.09
51 °
Chappaquiddick, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high51°
Average low43°
Average precipitation0.09 in
Chance of precipitation23%
Record high63° (2021)
Record low30° (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 Chappaquiddick, 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 Chappaquiddick, 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.