Monthly outlook for Grand Beach, MI: average high 79°, average low 66.5°. That is 0.4° above the climate normal for August. Precipitation is expected on 5 days (about 3.3 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 22 August (89.1°), the coolest 14 August (58.1°).
79°/66.5°
Average high / low
+0.4°
Above normal
5 / 6
Wet days / normal
3.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.5°
78.3°
-1°
19 August – 28 August
83.2°
78.3°
+2.7°
29 August – 7 September
at normal
76.7°
—
August records over 66 years
95.9°24 August 2023All-time high
52°25 August 2017All-time low
Climate normals and records are computed from the nearest reference point — Beverly Shores (12 mi).
Mon, 1088° / 71°2.44
88 °
Grand Beach, Monday, 10 August
Heavy rain. High 88°, low 71°.
Pressure29.91 inHg
Wind8.3 mph W
Humidity84%
Visibility6.2 mi
Dew point72°
Tue, 1179° / 67°0.24
79 °
Grand Beach, Tuesday, 11 August
Rain. High 79°, low 67°.
Pressure29.83 inHg
Wind16.7 mph S
Humidity83%
Visibility6.2 mi
Dew point73°
Wed, 1276° / 69°0
76 °
Grand Beach, Wednesday, 12 August
Overcast. High 76°, low 69°.
Pressure29.83 inHg
Wind4.6 mph NW
Humidity77%
Visibility6.2 mi
Dew point68°
Thu, 1369° / 62°0
69 °
Grand Beach, Thursday, 13 August
Overcast. High 69°, low 62°.
Pressure30.03 inHg
Wind11.5 mph N
Humidity61%
Visibility—
Dew point54°
Fri, 1471° / 58°0
71 °
Grand Beach, Friday, 14 August
Partly cloudy. High 71°, low 58°.
Pressure30.18 inHg
Wind11.8 mph N
Humidity55%
Visibility—
Dew point52°
Sat, 1574° / 60°0
74 °
Grand Beach, Saturday, 15 August
Partly cloudy. High 74°, low 60°.
Pressure30.27 inHg
Wind9.1 mph SE
Humidity60%
Visibility—
Dew point56°
Sun, 1673° / 64°0.03
73 °
Grand Beach, Sunday, 16 August
Light rain. High 73°, low 64°.
Pressure30.09 inHg
Wind10.8 mph SE
Humidity70%
Visibility—
Dew point61°
Mon, 1775° / 67°0
75 °
Grand Beach, Monday, 17 August
Partly cloudy. High 75°, low 67°.
Pressure30.09 inHg
Wind8 mph NE
Humidity72%
Visibility—
Dew point64°
Tue, 1877° / 65°0
77 °
Grand Beach, Tuesday, 18 August
Partly cloudy. High 77°, low 65°.
Pressure30.06 inHg
Wind6.6 mph SE
Humidity61%
Visibility—
Dew point60°
Wed, 1983° / 68°0.07
83 °
Grand Beach, Wednesday, 19 August
Light rain. High 83°, low 68°.
Pressure29.94 inHg
Wind13.5 mph SE
Humidity81%
Visibility—
Dew point68°
Thu, 2084° / 74°0
84 °
Grand Beach, Thursday, 20 August
Overcast. High 84°, low 74°.
Pressure29.77 inHg
Wind11.9 mph S
Humidity68%
Visibility—
Dew point71°
Fri, 2178° / 69°0
78 °
Grand Beach, Friday, 21 August
Clear. High 78°, low 69°.
Pressure29.91 inHg
Wind13.2 mph N
Humidity75%
Visibility—
Dew point69°
Sat, 2289° / 69°0.01
89 °
Grand Beach, Saturday, 22 August
Light rain. High 89°, low 69°.
Pressure29.88 inHg
Wind14.4 mph SE
Humidity70%
Visibility—
Dew point73°
Sun, 2386° / 70°0
86 °
Grand Beach, Sunday, 23 August
Partly cloudy. High 86°, low 70°.
Pressure29.83 inHg
Wind13.4 mph NW
Humidity55%
Visibility—
Dew point67°
Mon, 2478° / 68°0.29
78 °
Grand Beach, Monday, 24 August
Rain. High 78°, low 68°.
Pressure30.03 inHg
Wind9 mph E
Humidity79%
Visibility—
Dew point69°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 67°0.11
79 °
Grand Beach, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low67°
Average precipitation0.11 in
Chance of precipitation33%
Record high89° (2024)
Record low52° (2017)
Wed, 2679° / 69°0.14
79 °
Grand Beach, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low69°
Average precipitation0.14 in
Chance of precipitation33%
Record high92° (2024)
Record low56° (2017)
Thu, 2779° / 69°0.13
79 °
Grand Beach, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low69°
Average precipitation0.13 in
Chance of precipitation33%
Record high93° (2024)
Record low55° (2025)
Fri, 2878° / 68°0.13
78 °
Grand Beach, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.13 in
Chance of precipitation35%
Record high89° (2021)
Record low53° (1986)
Sat, 2978° / 68°0.11
78 °
Grand Beach, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.11 in
Chance of precipitation37%
Record high89° (2022)
Record low54° (1965)
Sun, 3078° / 68°0.08
78 °
Grand Beach, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.08 in
Chance of precipitation30%
Record high90° (1995)
Record low57° (2025)
Mon, 3177° / 66°0.07
77 °
Grand Beach, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low66°
Average precipitation0.07 in
Chance of precipitation27%
Record high87° (1969)
Record low54° (2025)
Tue, 0177° / 66°0.17
77 °
Grand Beach, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low66°
Average precipitation0.17 in
Chance of precipitation30%
Record high90° (2011)
Record low54° (2017)
Wed, 0277° / 67°0.07
77 °
Grand Beach, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low67°
Average precipitation0.07 in
Chance of precipitation25%
Record high87° (2008)
Record low52° (2017)
Thu, 0377° / 67°0.07
77 °
Grand Beach, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low67°
Average precipitation0.07 in
Chance of precipitation32%
Record high89° (2023)
Record low56° (2024)
Fri, 0476° / 66°0.09
76 °
Grand Beach, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low66°
Average precipitation0.09 in
Chance of precipitation33%
Record high88° (2018)
Record low56° (2025)
Sat, 0576° / 66°0.07
76 °
Grand Beach, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low66°
Average precipitation0.07 in
Chance of precipitation25%
Record high88° (2007)
Record low56° (2019)
Sun, 0676° / 66°0.11
76 °
Grand Beach, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low66°
Average precipitation0.11 in
Chance of precipitation35%
Record high88° (1990)
Record low52° (2025)
Mon, 0776° / 65°0.11
76 °
Grand Beach, Monday, 7 September
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.11 in
Chance of precipitation38%
Record high90° (1960)
Record low54° (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 Grand 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 Grand 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.