Monthly outlook for Mariner, ME: average high 75.1°, average low 62.7°. That is 0.3° above the climate normal for August. Precipitation is expected on 9 days (about 1.9 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 9 August (87.2°), the coolest 23 August (56.1°).
75.1°/62.7°
Average high / low
+0.3°
Above normal
9 / 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
77.2°
75.1°
+1.1°
18 August – 27 August
71.7°
73.5°
-1°
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 (6 mi).
Sun, 0987° / 69°0
87 °
Mariner, Sunday, 9 August
Mostly clear. High 87°, low 69°.
Pressure29.85 inHg
Wind5 mph SE
Humidity64%
Visibility6.2 mi
Dew point66°
Mon, 1079° / 68°0.07
79 °
Mariner, Monday, 10 August
Light rain. High 79°, low 68°.
Pressure29.97 inHg
Wind10 mph S
Humidity51%
Visibility6.2 mi
Dew point58°
Tue, 1184° / 65°0.08
84 °
Mariner, Tuesday, 11 August
Rain. High 84°, low 65°.
Pressure29.71 inHg
Wind7.6 mph W
Humidity50%
Visibility6.2 mi
Dew point61°
Wed, 1270° / 63°0.04
70 °
Mariner, Wednesday, 12 August
Light rain. High 70°, low 63°.
Pressure29.80 inHg
Wind4 mph S
Humidity88%
Visibility6.2 mi
Dew point60°
Thu, 1374° / 60°0.33
74 °
Mariner, Thursday, 13 August
Rain. High 74°, low 60°.
Pressure29.68 inHg
Wind13.1 mph S
Humidity73%
Visibility—
Dew point63°
Fri, 1473° / 57°0
73 °
Mariner, Friday, 14 August
Clear. High 73°, low 57°.
Pressure29.83 inHg
Wind10.4 mph N
Humidity49%
Visibility—
Dew point47°
Sat, 1575° / 61°0
75 °
Mariner, Saturday, 15 August
Partly cloudy. High 75°, low 61°.
Pressure30.06 inHg
Wind11.4 mph NW
Humidity42%
Visibility—
Dew point45°
Sun, 1674° / 57°0
74 °
Mariner, Sunday, 16 August
Clear. High 74°, low 57°.
Pressure30.24 inHg
Wind12.8 mph S
Humidity37%
Visibility—
Dew point43°
Mon, 1776° / 60°0
76 °
Mariner, Monday, 17 August
Overcast. High 76°, low 60°.
Pressure30.15 inHg
Wind12.3 mph S
Humidity49%
Visibility—
Dew point51°
Tue, 1871° / 64°0.33
71 °
Mariner, Tuesday, 18 August
Rain. High 71°, low 64°.
Pressure30.00 inHg
Wind11.3 mph SW
Humidity97%
Visibility—
Dew point64°
Wed, 1974° / 64°0.05
74 °
Mariner, Wednesday, 19 August
Light rain. High 74°, low 64°.
Pressure29.85 inHg
Wind7.7 mph N
Humidity64%
Visibility—
Dew point60°
Thu, 2072° / 61°0
72 °
Mariner, Thursday, 20 August
Clear. High 72°, low 61°.
Pressure30.00 inHg
Wind10.1 mph SE
Humidity46%
Visibility—
Dew point49°
Fri, 2173° / 63°0.07
73 °
Mariner, Friday, 21 August
Light rain. High 73°, low 63°.
Pressure30.00 inHg
Wind13.3 mph S
Humidity69%
Visibility—
Dew point60°
Sat, 2272° / 64°0.61
72 °
Mariner, Saturday, 22 August
Rain. High 72°, low 64°.
Pressure29.77 inHg
Wind15.6 mph S
Humidity99%
Visibility—
Dew point66°
Sun, 2368° / 56°0.06
68 °
Mariner, Sunday, 23 August
Light rain. High 68°, low 56°.
Pressure29.68 inHg
Wind16 mph NW
Humidity61%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2473° / 62°0.07
73 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 °
Mariner, 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 Mariner, 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 Mariner, 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.