Monthly outlook for Summer Harbor, ME: average high 49.7°, average low 38.9°. That is 0.1° below the climate normal for October. Precipitation is expected on 6 days (about 2.0 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 30 October (61.3°), the coolest 28 October (28.9°).
49.7°/38.9°
Average high / low
−0.1°
Below normal
6 / 5
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
27 October – 5 November
49.7°
50.8°
-0.6°
6 November – 15 November
49.7°
47°
+1.5°
16 November – 25 November
at normal
42.9°
—
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).
Wed, 2848° / 29°0
48 °
Summer Harbor, Wednesday, 28 October
Overcast. High 48°, low 29°.
Pressure30.45 inHg
Wind4.1 mph SW
Humidity56%
Visibility6.2 mi
Dew point26°
Thu, 2955° / 41°0
55 °
Summer Harbor, Thursday, 29 October
Clear. High 55°, low 41°.
Pressure30.15 inHg
Wind8.4 mph SW
Humidity69%
Visibility6.2 mi
Dew point45°
Fri, 3061° / 47°0.13
61 °
Summer Harbor, Friday, 30 October
Rain. High 61°, low 47°.
Pressure29.85 inHg
Wind8.1 mph NW
Humidity63%
Visibility6.2 mi
Dew point48°
Sat, 3148° / 36°0
48 °
Summer Harbor, Saturday, 31 October
Clear. High 48°, low 36°.
Pressure30.21 inHg
Wind12.1 mph NW
Humidity57%
Visibility—
Dew point30°
Sun, 0150° / 33°0
50 °
Summer Harbor, Sunday, 1 November
Clear. High 50°, low 33°.
Pressure30.36 inHg
Wind6.9 mph SW
Humidity56%
Visibility—
Dew point29°
Mon, 0251° / 39°0.36
51 °
Summer Harbor, Monday, 2 November
Rain. High 51°, low 39°.
Pressure30.06 inHg
Wind12.2 mph NE
Humidity68%
Visibility—
Dew point40°
Tue, 0346° / 36°0.16
46 °
Summer Harbor, Tuesday, 3 November
Snow. High 46°, low 36°.
Pressure30.27 inHg
Wind16.6 mph NE
Humidity54%
Visibility—
Dew point24°
Wed, 0442° / 32°0
42 °
Summer Harbor, Wednesday, 4 November
Overcast. High 42°, low 32°.
Pressure30.47 inHg
Wind11.8 mph NE
Humidity44%
Visibility—
Dew point19°
Thu, 0548° / 37°0
48 °
Summer Harbor, Thursday, 5 November
Partly cloudy. High 48°, low 37°.
Pressure30.30 inHg
Wind9.4 mph S
Humidity68%
Visibility—
Dew point36°
Fri, 0652° / 49°0.87
52 °
Summer Harbor, Friday, 6 November
Rain. High 52°, low 49°.
Pressure29.80 inHg
Wind13.2 mph E
Humidity99%
Visibility—
Dew point51°
Sat, 0748° / 41°0.18
48 °
Summer Harbor, Saturday, 7 November
Light rain. High 48°, low 41°.
Pressure29.65 inHg
Wind19 mph NE
Humidity94%
Visibility—
Dew point46°
Sun, 0848° / 38°0
48 °
Summer Harbor, Sunday, 8 November
Overcast. High 48°, low 38°.
Pressure29.97 inHg
Wind10.2 mph NW
Humidity74%
Visibility—
Dew point36°
Mon, 0946° / 37°0
46 °
Summer Harbor, Monday, 9 November
Clear. High 46°, low 37°.
Pressure30.21 inHg
Wind7.7 mph NE
Humidity58%
Visibility—
Dew point29°
Tue, 1050° / 44°0
50 °
Summer Harbor, Tuesday, 10 November
Overcast. High 50°, low 44°.
Pressure30.03 inHg
Wind14.7 mph S
Humidity77%
Visibility—
Dew point42°
Wed, 1153° / 45°0.26
53 °
Summer Harbor, Wednesday, 11 November
Light rain. High 53°, low 45°.
Pressure29.56 inHg
Wind20.7 mph S
Humidity96%
Visibility—
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 1246° / 37°0.12
46 °
Summer Harbor, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.12 in
Chance of precipitation35%
Record high63° (2022)
Record low26° (1976)
Fri, 1345° / 36°0.18
45 °
Summer Harbor, Friday, 13 November
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.18 in
Chance of precipitation37%
Record high58° (1982)
Record low19° (2019)
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)
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.