Monthly outlook for Summer Harbor, ME: average high 50.9°, average low 40.3°. That is 1° above the climate normal for October. Precipitation is expected on 5 days (about 2.5 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 30 October (63.8°), the coolest 12 November (32.3°).
50.9°/40.3°
Average high / low
+1°
Above normal
5 / 5
Wet days / normal
2.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
29 October – 7 November
55.8°
50.3°
+3.1°
8 November – 17 November
42.7°
46°
-1.8°
18 November – 27 November
at normal
42.5°
—
October records over 66 years
81°3 October 2023All-time high
29.7°24 October 1969All-time low
Climate normals and records are computed from the nearest reference point — Winter Harbor (3 mi).
Fri, 3064° / 47°0.11
64 °
Summer Harbor, Friday, 30 October
Rain. High 64°, low 47°.
Pressure29.83 inHg
Wind8.5 mph NW
Humidity60%
Visibility6.2 mi
Dew point47°
Sat, 3148° / 37°0
48 °
Summer Harbor, Saturday, 31 October
Clear. High 48°, low 37°.
Pressure30.27 inHg
Wind11.2 mph NW
Humidity56%
Visibility6.2 mi
Dew point24°
Sun, 0152° / 35°0
52 °
Summer Harbor, Sunday, 1 November
Clear. High 52°, low 35°.
Pressure30.36 inHg
Wind7 mph W
Humidity51%
Visibility6.2 mi
Dew point30°
Mon, 0261° / 42°0
61 °
Summer Harbor, Monday, 2 November
Partly cloudy. High 61°, low 42°.
Pressure30.18 inHg
Wind8.4 mph W
Humidity50%
Visibility6.2 mi
Dew point40°
Tue, 0351° / 45°0.06
51 °
Summer Harbor, Tuesday, 3 November
Light rain. High 51°, low 45°.
Pressure30.33 inHg
Wind6 mph E
Humidity87%
Visibility—
Dew point46°
Wed, 0451° / 46°0.04
51 °
Summer Harbor, Wednesday, 4 November
Light rain. High 51°, low 46°.
Pressure30.42 inHg
Wind9.4 mph SE
Humidity82%
Visibility—
Dew point45°
Thu, 0554° / 47°0.01
54 °
Summer Harbor, Thursday, 5 November
Light rain. High 54°, low 47°.
Pressure30.15 inHg
Wind13.4 mph SW
Humidity82%
Visibility—
Dew point48°
Fri, 0657° / 54°0.63
57 °
Summer Harbor, Friday, 6 November
Rain. High 57°, low 54°.
Pressure29.83 inHg
Wind13.2 mph S
Humidity95%
Visibility—
Dew point54°
Sat, 0758° / 48°1.6
58 °
Summer Harbor, Saturday, 7 November
Heavy rain. High 58°, low 48°.
Pressure29.26 inHg
Wind21.7 mph NW
Humidity99%
Visibility—
Dew point55°
Sun, 0845° / 37°0
45 °
Summer Harbor, Sunday, 8 November
Clear. High 45°, low 37°.
Pressure29.77 inHg
Wind20.6 mph NW
Humidity57%
Visibility—
Dew point27°
Mon, 0943° / 33°0
43 °
Summer Harbor, Monday, 9 November
Clear. High 43°, low 33°.
Pressure30.06 inHg
Wind16.7 mph NW
Humidity52%
Visibility—
Dew point23°
Tue, 1042° / 34°0
42 °
Summer Harbor, Tuesday, 10 November
Overcast. High 42°, low 34°.
Pressure30.09 inHg
Wind6 mph N
Humidity48%
Visibility—
Dew point21°
Wed, 1142° / 36°0.01
42 °
Summer Harbor, Wednesday, 11 November
Light rain. High 42°, low 36°.
Pressure29.85 inHg
Wind13.9 mph NE
Humidity66%
Visibility—
Dew point30°
Thu, 1243° / 32°0
43 °
Summer Harbor, Thursday, 12 November
Clear. High 43°, low 32°.
Pressure29.85 inHg
Wind10.5 mph N
Humidity48%
Visibility—
Dew point21°
Fri, 1341° / 33°0
41 °
Summer Harbor, Friday, 13 November
Overcast. High 41°, low 33°.
Pressure29.94 inHg
Wind5 mph N
Humidity52%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 1445° / 35°0.13
45 °
Summer Harbor, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high45°
Average low35°
Average precipitation0.13 in
Chance of precipitation40%
Record high57° (2005)
Record low15° (1986)
Sun, 1545° / 36°0.17
45 °
Summer Harbor, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.17 in
Chance of precipitation43%
Record high60° (1994)
Record low19° (2018)
Mon, 1644° / 35°0.17
44 °
Summer Harbor, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.17 in
Chance of precipitation38%
Record high59° (1989)
Record low19° (2019)
Tue, 1744° / 34°0.13
44 °
Summer Harbor, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high44°
Average low34°
Average precipitation0.13 in
Chance of precipitation28%
Record high60° (2006)
Record low22° (2019)
Wed, 1844° / 34°0.1
44 °
Summer Harbor, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high44°
Average low34°
Average precipitation0.1 in
Chance of precipitation35%
Record high57° (2021)
Record low26° (1997)
Thu, 1943° / 33°0.08
43 °
Summer Harbor, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high43°
Average low33°
Average precipitation0.08 in
Chance of precipitation22%
Record high56° (2021)
Record low21° (1986)
Fri, 2043° / 34°0.14
43 °
Summer Harbor, Friday, 20 November
Climate normal for this date — 60-year average.
Average high43°
Average low34°
Average precipitation0.14 in
Chance of precipitation35%
Record high58° (1991)
Record low17° (1986)
Sat, 2143° / 33°0.17
43 °
Summer Harbor, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high43°
Average low33°
Average precipitation0.17 in
Chance of precipitation32%
Record high57° (1991)
Record low20° (2022)
Sun, 2242° / 33°0.19
42 °
Summer Harbor, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high42°
Average low33°
Average precipitation0.19 in
Chance of precipitation48%
Record high55° (1992)
Record low9° (2018)
Mon, 2341° / 32°0.13
41 °
Summer Harbor, Monday, 23 November
Climate normal for this date — 60-year average.
Average high41°
Average low32°
Average precipitation0.13 in
Chance of precipitation30%
Record high60° (1999)
Record low13° (2018)
Tue, 2442° / 32°0.08
42 °
Summer Harbor, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.08 in
Chance of precipitation35%
Record high56° (2014)
Record low15° (1989)
Wed, 2542° / 32°0.11
42 °
Summer Harbor, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.11 in
Chance of precipitation33%
Record high56° (2014)
Record low15° (1993)
Thu, 2643° / 33°0.19
43 °
Summer Harbor, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high43°
Average low33°
Average precipitation0.19 in
Chance of precipitation52%
Record high55° (2025)
Record low14° (1978)
Fri, 2742° / 32°0.19
42 °
Summer Harbor, Friday, 27 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.19 in
Chance of precipitation47%
Record high57° (1999)
Record low10° (1978)
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 Summer Harbor, ME 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 Summer Harbor, ME 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.