Monthly outlook for Lagoon Beach, MI: average high 81.5°, average low 62.1°. That is 2.2° above the climate normal for August. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 20 August (98.3°), the coolest 14 August (51.8°).
81.5°/62.1°
Average high / low
+2.2°
Above normal
3 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.8°
77.8°
+1.1°
19 August – 28 August
84.3°
77.1°
+4°
29 August – 7 September
at normal
75.4°
—
August records over 66 years
97.2°8 August 2001All-time high
45.3°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Pinconning (14 mi).
Mon, 1087° / 68°0.16
87 °
Lagoon Beach, Monday, 10 August
Rain. High 87°, low 68°.
Pressure29.85 inHg
Wind5.6 mph W
Humidity64%
Visibility6.2 mi
Dew point67°
Tue, 1180° / 63°0.03
80 °
Lagoon Beach, Tuesday, 11 August
Light rain. High 80°, low 63°.
Pressure29.91 inHg
Wind6.8 mph SE
Humidity43%
Visibility6.2 mi
Dew point54°
Wed, 1284° / 63°0.01
84 °
Lagoon Beach, Wednesday, 12 August
Light rain. High 84°, low 63°.
Pressure29.77 inHg
Wind7.9 mph NW
Humidity52%
Visibility6.2 mi
Dew point60°
Thu, 1374° / 57°0
74 °
Lagoon Beach, Thursday, 13 August
Clear. High 74°, low 57°.
Pressure29.97 inHg
Wind15.8 mph N
Humidity33%
Visibility—
Dew point41°
Fri, 1472° / 52°0
72 °
Lagoon Beach, Friday, 14 August
Mostly clear. High 72°, low 52°.
Pressure30.15 inHg
Wind15.3 mph NE
Humidity38%
Visibility—
Dew point43°
Sat, 1575° / 52°0
75 °
Lagoon Beach, Saturday, 15 August
Overcast. High 75°, low 52°.
Pressure30.30 inHg
Wind8.9 mph SE
Humidity38%
Visibility—
Dew point44°
Sun, 1680° / 60°0
80 °
Lagoon Beach, Sunday, 16 August
Overcast. High 80°, low 60°.
Pressure30.12 inHg
Wind9.6 mph N
Humidity37%
Visibility—
Dew point46°
Mon, 1780° / 62°0
80 °
Lagoon Beach, Monday, 17 August
Partly cloudy. High 80°, low 62°.
Pressure30.03 inHg
Wind14 mph E
Humidity45%
Visibility—
Dew point54°
Tue, 1880° / 60°0
80 °
Lagoon Beach, Tuesday, 18 August
Partly cloudy. High 80°, low 60°.
Pressure30.06 inHg
Wind14.9 mph SE
Humidity44%
Visibility—
Dew point53°
Wed, 1992° / 63°0
92 °
Lagoon Beach, Wednesday, 19 August
Overcast. High 92°, low 63°.
Pressure29.94 inHg
Wind12 mph SW
Humidity41%
Visibility—
Dew point59°
Thu, 2098° / 67°0.04
98 °
Lagoon Beach, Thursday, 20 August
Light rain. High 98°, low 67°.
Pressure29.77 inHg
Wind9.4 mph S
Humidity56%
Visibility—
Dew point67°
Fri, 2184° / 68°0.03
84 °
Lagoon Beach, Friday, 21 August
Light rain. High 84°, low 68°.
Pressure29.88 inHg
Wind14.2 mph NE
Humidity48%
Visibility—
Dew point60°
Sat, 2284° / 62°0
84 °
Lagoon Beach, Saturday, 22 August
Mostly clear. High 84°, low 62°.
Pressure29.94 inHg
Wind16.8 mph NE
Humidity41%
Visibility—
Dew point56°
Sun, 2377° / 66°0.47
77 °
Lagoon Beach, Sunday, 23 August
Rain. High 77°, low 66°.
Pressure29.88 inHg
Wind21.6 mph NE
Humidity72%
Visibility—
Dew point66°
Mon, 2470° / 67°0.02
70 °
Lagoon Beach, Monday, 24 August
Light rain. High 70°, low 67°.
Pressure30.09 inHg
Wind19.7 mph NE
Humidity76%
Visibility—
Dew point60°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 62°0.06
78 °
Lagoon Beach, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (2021)
Record low48° (2017)
Wed, 2678° / 63°0.17
78 °
Lagoon Beach, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.17 in
Chance of precipitation42%
Record high91° (2024)
Record low48° (2017)
Thu, 2778° / 63°0.13
78 °
Lagoon Beach, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.13 in
Chance of precipitation45%
Record high95° (1973)
Record low47° (2025)
Fri, 2877° / 62°0.09
77 °
Lagoon Beach, Friday, 28 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.09 in
Chance of precipitation40%
Record high93° (1973)
Record low46° (1986)
Sat, 2977° / 61°0.1
77 °
Lagoon Beach, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.1 in
Chance of precipitation40%
Record high91° (2021)
Record low45° (1982)
Sun, 3076° / 61°0.07
76 °
Lagoon Beach, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.07 in
Chance of precipitation30%
Record high90° (1973)
Record low45° (2025)
Mon, 3176° / 60°0.05
76 °
Lagoon Beach, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.05 in
Chance of precipitation17%
Record high90° (2010)
Record low47° (2025)
Tue, 0176° / 60°0.07
76 °
Lagoon Beach, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.07 in
Chance of precipitation27%
Record high88° (1973)
Record low48° (2009)
Wed, 0275° / 60°0.08
75 °
Lagoon Beach, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.08 in
Chance of precipitation30%
Record high91° (2011)
Record low48° (1976)
Thu, 0376° / 60°0.1
76 °
Lagoon Beach, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.1 in
Chance of precipitation28%
Record high89° (1973)
Record low48° (1974)
Fri, 0475° / 59°0.09
75 °
Lagoon Beach, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.09 in
Chance of precipitation25%
Record high89° (2023)
Record low46° (1974)
Sat, 0575° / 59°0.08
75 °
Lagoon Beach, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.08 in
Chance of precipitation27%
Record high89° (2023)
Record low47° (1974)
Sun, 0675° / 60°0.07
75 °
Lagoon Beach, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.07 in
Chance of precipitation32%
Record high87° (1998)
Record low46° (1988)
Mon, 0774° / 59°0.09
74 °
Lagoon Beach, Monday, 7 September
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.09 in
Chance of precipitation33%
Record high89° (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 Lagoon Beach, 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 Lagoon Beach, 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.