Monthly outlook for Nantucket, MA: average high 59.8°, average low 53.1°. That is 0.7° above the climate normal for October. Precipitation is expected on 5 days (about 1.9 inches), against a normal of 5 days and 2.4 inches. The warmest day looks like 14 October (65°), the coolest 18 October (41.1°).
59.8°/53.1°
Average high / low
+0.7°
Above normal
5 / 5
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
59.9°
59.1°
+0.4°
21 October – 30 October
59.6°
56.7°
+1.6°
31 October – 9 November
at normal
54.7°
—
October records over 66 years
72.1°1 October 2010All-time high
37.9°23 October 1969All-time low
Climate normals and records are computed from the nearest reference point — Pocomo (3 mi).
Mon, 1263° / 50°0.17
63 °
Nantucket, Monday, 12 October
Rain. High 63°, low 50°.
Pressure29.71 inHg
Wind21.2 mph N
Humidity90%
Visibility6.2 mi
Dew point57°
Tue, 1365° / 50°0
65 °
Nantucket, Tuesday, 13 October
Partly cloudy. High 65°, low 50°.
Pressure30.00 inHg
Wind12.1 mph E
Humidity86%
Visibility6.2 mi
Dew point56°
Wed, 1465° / 59°0.01
65 °
Nantucket, Wednesday, 14 October
Light rain. High 65°, low 59°.
Pressure29.80 inHg
Wind7.9 mph NE
Humidity93%
Visibility6.2 mi
Dew point61°
Thu, 1561° / 56°0
61 °
Nantucket, Thursday, 15 October
Overcast. High 61°, low 56°.
Pressure30.15 inHg
Wind15.9 mph N
Humidity70%
Visibility6.2 mi
Dew point47°
Fri, 1664° / 54°0.52
64 °
Nantucket, Friday, 16 October
Rain. High 64°, low 54°.
Pressure29.80 inHg
Wind36.9 mph NW
Humidity82%
Visibility—
Dew point52°
Sat, 1753° / 44°0.28
53 °
Nantucket, Saturday, 17 October
Rain. High 53°, low 44°.
Pressure29.83 inHg
Wind34.4 mph NW
Humidity71%
Visibility—
Dew point41°
Sun, 1849° / 41°0.07
49 °
Nantucket, Sunday, 18 October
Light rain. High 49°, low 41°.
Pressure30.42 inHg
Wind34.7 mph NW
Humidity60%
Visibility—
Dew point29°
Mon, 1959° / 50°0
59 °
Nantucket, Monday, 19 October
Mostly clear. High 59°, low 50°.
Pressure30.53 inHg
Wind29.8 mph W
Humidity59%
Visibility—
Dew point41°
Tue, 2058° / 55°0
58 °
Nantucket, Tuesday, 20 October
Clear. High 58°, low 55°.
Pressure30.39 inHg
Wind20 mph W
Humidity63%
Visibility—
Dew point43°
Wed, 2156° / 52°0
56 °
Nantucket, Wednesday, 21 October
Overcast. High 56°, low 52°.
Pressure30.68 inHg
Wind19.3 mph E
Humidity68%
Visibility—
Dew point44°
Thu, 2258° / 54°0
58 °
Nantucket, Thursday, 22 October
Overcast. High 58°, low 54°.
Pressure30.68 inHg
Wind15.5 mph E
Humidity73%
Visibility—
Dew point47°
Fri, 2360° / 58°0
60 °
Nantucket, Friday, 23 October
Mostly clear. High 60°, low 58°.
Pressure30.47 inHg
Wind9.1 mph SW
Humidity83%
Visibility—
Dew point53°
Sat, 2461° / 59°0
61 °
Nantucket, Saturday, 24 October
Overcast. High 61°, low 59°.
Pressure30.24 inHg
Wind14.7 mph SW
Humidity87%
Visibility—
Dew point56°
Sun, 2561° / 61°0
61 °
Nantucket, Sunday, 25 October
Overcast. High 61°, low 61°.
Pressure29.94 inHg
Wind19.3 mph SW
Humidity96%
Visibility—
Dew point60°
Mon, 2661° / 56°0
61 °
Nantucket, Monday, 26 October
Overcast. High 61°, low 56°.
Pressure29.83 inHg
Wind17.7 mph N
Humidity86%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2756° / 51°0.16
56 °
Nantucket, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low51°
Average precipitation0.16 in
Chance of precipitation28%
Record high64° (2022)
Record low40° (1976)
Wed, 2857° / 51°0.17
57 °
Nantucket, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high57°
Average low51°
Average precipitation0.17 in
Chance of precipitation45%
Record high67° (1995)
Record low39° (1976)
Thu, 2956° / 50°0.13
56 °
Nantucket, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low50°
Average precipitation0.13 in
Chance of precipitation32%
Record high65° (2017)
Record low39° (1965)
Fri, 3055° / 49°0.16
55 °
Nantucket, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low49°
Average precipitation0.16 in
Chance of precipitation30%
Record high66° (2017)
Record low38° (1966)
Sat, 3155° / 51°0.09
55 °
Nantucket, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low51°
Average precipitation0.09 in
Chance of precipitation22%
Record high65° (2019)
Record low40° (1988)
Sun, 0156° / 51°0.11
56 °
Nantucket, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high56°
Average low51°
Average precipitation0.11 in
Chance of precipitation30%
Record high66° (2019)
Record low42° (1976)
Mon, 0256° / 50°0.15
56 °
Nantucket, Monday, 2 November
Climate normal for this date — 60-year average.
Average high56°
Average low50°
Average precipitation0.15 in
Chance of precipitation28%
Record high65° (1971)
Record low35° (1965)
Tue, 0355° / 50°0.24
55 °
Nantucket, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high55°
Average low50°
Average precipitation0.24 in
Chance of precipitation33%
Record high64° (1971)
Record low39° (2002)
Wed, 0455° / 49°0.06
55 °
Nantucket, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high55°
Average low49°
Average precipitation0.06 in
Chance of precipitation20%
Record high61° (2017)
Record low40° (1989)
Thu, 0555° / 50°0.17
55 °
Nantucket, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high55°
Average low50°
Average precipitation0.17 in
Chance of precipitation38%
Record high63° (2022)
Record low37° (1965)
Fri, 0655° / 50°0.14
55 °
Nantucket, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low50°
Average precipitation0.14 in
Chance of precipitation42%
Record high64° (2022)
Record low40° (1987)
Sat, 0754° / 49°0.1
54 °
Nantucket, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high54°
Average low49°
Average precipitation0.1 in
Chance of precipitation30%
Record high65° (2022)
Record low38° (2002)
Sun, 0854° / 47°0.19
54 °
Nantucket, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low47°
Average precipitation0.19 in
Chance of precipitation32%
Record high62° (2022)
Record low37° (2019)
Mon, 0953° / 48°0.11
53 °
Nantucket, Monday, 9 November
Climate normal for this date — 60-year average.
Average high53°
Average low48°
Average precipitation0.11 in
Chance of precipitation32%
Record high61° (1989)
Record low34° (1976)
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 Nantucket, 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 Nantucket, 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.