Monthly outlook for Manistique, MI: average high 71.9°, average low 56.1°. That is 0.7° below the climate normal for August. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 17 August (80.2°), the coolest 15 August (50.2°).
71.9°/56.1°
Average high / low
−0.7°
Below normal
6 / 5
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
73.5°
73.7°
-0.1°
19 August – 28 August
69.2°
72.5°
-1.8°
29 August – 7 September
at normal
70.5°
—
August records over 66 years
90.7°7 August 2001All-time high
47.3°29 August 2025All-time low
Mon, 1078° / 61°0.02
78 °
Manistique, Monday, 10 August
Light rain. High 78°, low 61°.
Pressure29.91 inHg
Wind2.3 mph NW
Humidity51%
Visibility6.2 mi
Dew point56°
Tue, 1173° / 60°0.11
73 °
Manistique, Tuesday, 11 August
Light rain. High 73°, low 60°.
Pressure29.88 inHg
Wind4 mph S
Humidity59%
Visibility6.2 mi
Dew point55°
Wed, 1270° / 53°0.07
70 °
Manistique, Wednesday, 12 August
Light rain. High 70°, low 53°.
Pressure29.83 inHg
Wind9.5 mph N
Humidity62%
Visibility6.2 mi
Dew point56°
Thu, 1371° / 50°0
71 °
Manistique, Thursday, 13 August
Overcast. High 71°, low 50°.
Pressure29.97 inHg
Wind9 mph NW
Humidity41%
Visibility—
Dew point44°
Fri, 1472° / 52°0
72 °
Manistique, Friday, 14 August
Mostly clear. High 72°, low 52°.
Pressure30.09 inHg
Wind13.8 mph N
Humidity45%
Visibility—
Dew point48°
Sat, 1567° / 50°0
67 °
Manistique, Saturday, 15 August
Overcast. High 67°, low 50°.
Pressure30.30 inHg
Wind7.4 mph S
Humidity54%
Visibility—
Dew point47°
Sun, 1675° / 60°0
75 °
Manistique, Sunday, 16 August
Overcast. High 75°, low 60°.
Pressure30.09 inHg
Wind11.8 mph S
Humidity53%
Visibility—
Dew point56°
Mon, 1780° / 62°0
80 °
Manistique, Monday, 17 August
Partly cloudy. High 80°, low 62°.
Pressure29.97 inHg
Wind9 mph SW
Humidity47%
Visibility—
Dew point56°
Tue, 1875° / 62°0.98
75 °
Manistique, Tuesday, 18 August
Heavy rain. High 75°, low 62°.
Pressure29.85 inHg
Wind14.5 mph S
Humidity70%
Visibility—
Dew point63°
Wed, 1966° / 57°0.05
66 °
Manistique, Wednesday, 19 August
Light rain. High 66°, low 57°.
Pressure29.77 inHg
Wind19.6 mph N
Humidity92%
Visibility—
Dew point57°
Thu, 2069° / 53°0
69 °
Manistique, Thursday, 20 August
Overcast. High 69°, low 53°.
Pressure30.00 inHg
Wind17 mph N
Humidity43%
Visibility—
Dew point44°
Fri, 2172° / 51°0
72 °
Manistique, Friday, 21 August
Overcast. High 72°, low 51°.
Pressure30.12 inHg
Wind7.6 mph N
Humidity44%
Visibility—
Dew point46°
Sat, 2267° / 56°0.1
67 °
Manistique, Saturday, 22 August
Light rain. High 67°, low 56°.
Pressure29.91 inHg
Wind16.6 mph S
Humidity73%
Visibility—
Dew point56°
Sun, 2369° / 58°0.09
69 °
Manistique, Sunday, 23 August
Light rain. High 69°, low 58°.
Pressure29.71 inHg
Wind15.3 mph NW
Humidity68%
Visibility—
Dew point56°
Mon, 2473° / 54°0
73 °
Manistique, Monday, 24 August
Partly cloudy. High 73°, low 54°.
Pressure30.03 inHg
Wind7.3 mph NW
Humidity50%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2573° / 62°0.12
73 °
Manistique, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.12 in
Chance of precipitation33%
Record high86° (2021)
Record low49° (2017)
Wed, 2673° / 62°0.1
73 °
Manistique, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.1 in
Chance of precipitation37%
Record high83° (2013)
Record low50° (2025)
Thu, 2773° / 63°0.2
73 °
Manistique, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high73°
Average low63°
Average precipitation0.2 in
Chance of precipitation42%
Record high84° (1983)
Record low50° (2025)
Fri, 2872° / 62°0.08
72 °
Manistique, Friday, 28 August
Climate normal for this date — 60-year average.
Average high72°
Average low62°
Average precipitation0.08 in
Chance of precipitation33%
Record high88° (1991)
Record low49° (1965)
Sat, 2972° / 61°0.09
72 °
Manistique, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high72°
Average low61°
Average precipitation0.09 in
Chance of precipitation37%
Record high85° (1991)
Record low47° (2025)
Sun, 3071° / 61°0.13
71 °
Manistique, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high71°
Average low61°
Average precipitation0.13 in
Chance of precipitation32%
Record high89° (1991)
Record low49° (1976)
Mon, 3171° / 61°0.06
71 °
Manistique, Monday, 31 August
Climate normal for this date — 60-year average.
Average high71°
Average low61°
Average precipitation0.06 in
Chance of precipitation27%
Record high80° (2024)
Record low51° (2017)
Tue, 0171° / 60°0.11
71 °
Manistique, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low60°
Average precipitation0.11 in
Chance of precipitation32%
Record high84° (1990)
Record low49° (2017)
Wed, 0271° / 61°0.09
71 °
Manistique, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low61°
Average precipitation0.09 in
Chance of precipitation35%
Record high86° (2011)
Record low47° (1976)
Thu, 0371° / 60°0.13
71 °
Manistique, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low60°
Average precipitation0.13 in
Chance of precipitation40%
Record high81° (1999)
Record low47° (2025)
Fri, 0470° / 60°0.09
70 °
Manistique, Friday, 4 September
Climate normal for this date — 60-year average.
Average high70°
Average low60°
Average precipitation0.09 in
Chance of precipitation35%
Record high82° (2023)
Record low43° (2025)
Sat, 0569° / 59°0.13
69 °
Manistique, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high69°
Average low59°
Average precipitation0.13 in
Chance of precipitation38%
Record high81° (2007)
Record low49° (2025)
Sun, 0670° / 60°0.09
70 °
Manistique, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high70°
Average low60°
Average precipitation0.09 in
Chance of precipitation42%
Record high80° (1978)
Record low48° (1986)
Mon, 0769° / 58°0.13
69 °
Manistique, Monday, 7 September
Climate normal for this date — 60-year average.
Average high69°
Average low58°
Average precipitation0.13 in
Chance of precipitation37%
Record high82° (1960)
Record low44° (2025)
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 Manistique, MI 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 Manistique, MI 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.