Monthly outlook for Dunns, ME: average high 78.4°, average low 60.1°. That is 2.2° above the climate normal for August. Precipitation is expected on 5 days (about 1.9 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 9 August (90°), the coolest 23 August (53.1°).
78.4°/60.1°
Average high / low
+2.2°
Above normal
5 / 5
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
79.8°
75.1°
+2.6°
18 August – 27 August
76.1°
73.5°
+1.5°
28 August – 6 September
at normal
71.8°
—
August records over 66 years
93.6°12 August 2025All-time high
48°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Portland (13 mi).
Sun, 0990° / 70°0.04
90 °
Dunns, Sunday, 9 August
Light rain. High 90°, low 70°.
Pressure29.85 inHg
Wind3.8 mph W
Humidity43%
Visibility6.2 mi
Dew point64°
Mon, 1085° / 65°0.03
85 °
Dunns, Monday, 10 August
Light rain. High 85°, low 65°.
Pressure29.91 inHg
Wind8.2 mph S
Humidity36%
Visibility6.2 mi
Dew point56°
Tue, 1186° / 62°0.09
86 °
Dunns, Tuesday, 11 August
Rain. High 86°, low 62°.
Pressure29.71 inHg
Wind3.8 mph NW
Humidity46%
Visibility6.2 mi
Dew point62°
Wed, 1273° / 60°0.21
73 °
Dunns, Wednesday, 12 August
Rain. High 73°, low 60°.
Pressure29.77 inHg
Wind4.2 mph S
Humidity88%
Visibility6.2 mi
Dew point60°
Thu, 1375° / 59°0.2
75 °
Dunns, Thursday, 13 August
Light rain. High 75°, low 59°.
Pressure29.65 inHg
Wind5.9 mph SW
Humidity66%
Visibility—
Dew point60°
Fri, 1471° / 55°0
71 °
Dunns, Friday, 14 August
Clear. High 71°, low 55°.
Pressure29.88 inHg
Wind9.8 mph W
Humidity40%
Visibility—
Dew point43°
Sat, 1576° / 56°0
76 °
Dunns, Saturday, 15 August
Clear. High 76°, low 56°.
Pressure29.94 inHg
Wind12.9 mph NW
Humidity47%
Visibility—
Dew point48°
Sun, 1678° / 55°0
78 °
Dunns, Sunday, 16 August
Clear. High 78°, low 55°.
Pressure30.12 inHg
Wind5.8 mph N
Humidity43%
Visibility—
Dew point47°
Mon, 1780° / 57°0
80 °
Dunns, Monday, 17 August
Partly cloudy. High 80°, low 57°.
Pressure30.15 inHg
Wind11.5 mph S
Humidity45%
Visibility—
Dew point51°
Tue, 1878° / 62°0.02
78 °
Dunns, Tuesday, 18 August
Light rain. High 78°, low 62°.
Pressure30.12 inHg
Wind10.9 mph SW
Humidity74%
Visibility—
Dew point60°
Wed, 1980° / 61°0
80 °
Dunns, Wednesday, 19 August
Overcast. High 80°, low 61°.
Pressure29.97 inHg
Wind12.1 mph S
Humidity47%
Visibility—
Dew point54°
Thu, 2070° / 63°1.04
70 °
Dunns, Thursday, 20 August
Rain. High 70°, low 63°.
Pressure29.62 inHg
Wind13 mph S
Humidity98%
Visibility—
Dew point66°
Fri, 2174° / 58°0
74 °
Dunns, Friday, 21 August
Partly cloudy. High 74°, low 58°.
Pressure29.53 inHg
Wind12.3 mph NW
Humidity54%
Visibility—
Dew point54°
Sat, 2276° / 55°0
76 °
Dunns, Saturday, 22 August
Clear. High 76°, low 55°.
Pressure29.91 inHg
Wind10.3 mph NW
Humidity36%
Visibility—
Dew point39°
Sun, 2381° / 53°0.01
81 °
Dunns, Sunday, 23 August
Light rain. High 81°, low 53°.
Pressure30.06 inHg
Wind10.2 mph S
Humidity32%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2473° / 62°0.07
73 °
Dunns, Monday, 24 August
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high82° (1980)
Record low53° (1971)
Tue, 2573° / 62°0.11
73 °
Dunns, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.11 in
Chance of precipitation32%
Record high86° (2020)
Record low53° (1989)
Wed, 2674° / 62°0.04
74 °
Dunns, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.04 in
Chance of precipitation17%
Record high86° (2021)
Record low54° (2019)
Thu, 2774° / 62°0.05
74 °
Dunns, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.05 in
Chance of precipitation27%
Record high84° (1983)
Record low52° (2019)
Fri, 2873° / 62°0.14
73 °
Dunns, Friday, 28 August
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.14 in
Chance of precipitation28%
Record high90° (2018)
Record low54° (2025)
Sat, 2972° / 62°0.15
72 °
Dunns, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high72°
Average low62°
Average precipitation0.15 in
Chance of precipitation28%
Record high86° (2010)
Record low49° (1982)
Sun, 3073° / 61°0.14
73 °
Dunns, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high73°
Average low61°
Average precipitation0.14 in
Chance of precipitation27%
Record high86° (2010)
Record low48° (1965)
Mon, 3173° / 61°0.09
73 °
Dunns, Monday, 31 August
Climate normal for this date — 60-year average.
Average high73°
Average low61°
Average precipitation0.09 in
Chance of precipitation22%
Record high89° (2010)
Record low48° (1965)
Tue, 0172° / 60°0.03
72 °
Dunns, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high72°
Average low60°
Average precipitation0.03 in
Chance of precipitation18%
Record high85° (2010)
Record low50° (2017)
Wed, 0271° / 60°0.11
71 °
Dunns, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low60°
Average precipitation0.11 in
Chance of precipitation28%
Record high87° (2010)
Record low49° (2017)
Thu, 0371° / 60°0.11
71 °
Dunns, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low60°
Average precipitation0.11 in
Chance of precipitation30%
Record high87° (2018)
Record low52° (2024)
Fri, 0471° / 60°0.14
71 °
Dunns, Friday, 4 September
Climate normal for this date — 60-year average.
Average high71°
Average low60°
Average precipitation0.14 in
Chance of precipitation33%
Record high83° (2023)
Record low53° (1965)
Sat, 0571° / 60°0.08
71 °
Dunns, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high71°
Average low60°
Average precipitation0.08 in
Chance of precipitation22%
Record high89° (2023)
Record low50° (1963)
Sun, 0670° / 60°0.12
70 °
Dunns, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high70°
Average low60°
Average precipitation0.12 in
Chance of precipitation32%
Record high89° (2018)
Record low50° (2000)
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 Dunns, 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 Dunns, 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.