Monthly outlook for Gustin, MI: average high 77.9°, average low 59°. That is 2.4° above the climate normal for August. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 20 August (96°), the coolest 14 August (48.6°).
77.9°/59°
Average high / low
+2.4°
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
76.5°
74.1°
+1.3°
19 August – 28 August
80.4°
73°
+4.1°
29 August – 7 September
at normal
71.5°
—
August records over 66 years
91.2°8 August 2001All-time high
48.9°27 August 2025All-time low
Climate normals and records are computed from the nearest reference point — Harrisville (6 mi).
Mon, 1085° / 63°0.16
85 °
Gustin, Monday, 10 August
Rain. High 85°, low 63°.
Pressure29.85 inHg
Wind8.3 mph W
Humidity62%
Visibility6.2 mi
Dew point64°
Tue, 1179° / 59°0
79 °
Gustin, Tuesday, 11 August
Overcast. High 79°, low 59°.
Pressure29.91 inHg
Wind2.1 mph SW
Humidity36%
Visibility6.2 mi
Dew point50°
Wed, 1280° / 60°0.02
80 °
Gustin, Wednesday, 12 August
Light rain. High 80°, low 60°.
Pressure29.77 inHg
Wind8.7 mph N
Humidity53%
Visibility6.2 mi
Dew point58°
Thu, 1368° / 54°0
68 °
Gustin, Thursday, 13 August
Partly cloudy. High 68°, low 54°.
Pressure29.97 inHg
Wind10.8 mph N
Humidity41%
Visibility—
Dew point42°
Fri, 1471° / 49°0
71 °
Gustin, Friday, 14 August
Partly cloudy. High 71°, low 49°.
Pressure30.15 inHg
Wind10.8 mph N
Humidity48%
Visibility—
Dew point45°
Sat, 1575° / 51°0
75 °
Gustin, Saturday, 15 August
Overcast. High 75°, low 51°.
Pressure30.27 inHg
Wind5.9 mph E
Humidity35%
Visibility—
Dew point43°
Sun, 1666° / 56°0.01
66 °
Gustin, Sunday, 16 August
Light rain. High 66°, low 56°.
Pressure30.12 inHg
Wind5.1 mph SW
Humidity71%
Visibility—
Dew point55°
Mon, 1778° / 60°0.06
78 °
Gustin, Monday, 17 August
Light rain. High 78°, low 60°.
Pressure30.03 inHg
Wind8.5 mph NW
Humidity44%
Visibility—
Dew point52°
Tue, 1880° / 56°0
80 °
Gustin, Tuesday, 18 August
Mostly clear. High 80°, low 56°.
Pressure30.06 inHg
Wind11.8 mph SE
Humidity39%
Visibility—
Dew point50°
Wed, 1987° / 62°0
87 °
Gustin, Wednesday, 19 August
Mostly clear. High 87°, low 62°.
Pressure29.94 inHg
Wind10.1 mph SW
Humidity39%
Visibility—
Dew point56°
Thu, 2096° / 66°0.02
96 °
Gustin, Thursday, 20 August
Light rain. High 96°, low 66°.
Pressure29.77 inHg
Wind9.3 mph SW
Humidity60%
Visibility—
Dew point67°
Fri, 2181° / 63°0
81 °
Gustin, Friday, 21 August
Overcast. High 81°, low 63°.
Pressure29.91 inHg
Wind9.3 mph NW
Humidity50%
Visibility—
Dew point58°
Sat, 2282° / 58°0
82 °
Gustin, Saturday, 22 August
Mostly clear. High 82°, low 58°.
Pressure29.97 inHg
Wind7.8 mph NE
Humidity33%
Visibility—
Dew point48°
Sun, 2367° / 64°0.5
67 °
Gustin, Sunday, 23 August
Rain. High 67°, low 64°.
Pressure29.94 inHg
Wind11.8 mph NE
Humidity88%
Visibility—
Dew point63°
Mon, 2469° / 63°0
69 °
Gustin, Monday, 24 August
Overcast. High 69°, low 63°.
Pressure30.15 inHg
Wind13.4 mph NE
Humidity55%
Visibility—
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2573° / 65°0.07
73 °
Gustin, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high73°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high91° (2021)
Record low51° (2017)
Wed, 2673° / 65°0.15
73 °
Gustin, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high73°
Average low65°
Average precipitation0.15 in
Chance of precipitation38%
Record high83° (1983)
Record low50° (2017)
Thu, 2774° / 65°0.17
74 °
Gustin, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low65°
Average precipitation0.17 in
Chance of precipitation52%
Record high86° (1973)
Record low49° (2025)
Fri, 2873° / 64°0.11
73 °
Gustin, Friday, 28 August
Climate normal for this date — 60-year average.
Average high73°
Average low64°
Average precipitation0.11 in
Chance of precipitation40%
Record high86° (2018)
Record low50° (1965)
Sat, 2973° / 64°0.13
73 °
Gustin, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high73°
Average low64°
Average precipitation0.13 in
Chance of precipitation48%
Record high87° (2021)
Record low51° (1982)
Sun, 3072° / 64°0.09
72 °
Gustin, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high72°
Average low64°
Average precipitation0.09 in
Chance of precipitation33%
Record high84° (1973)
Record low49° (2025)
Mon, 3172° / 62°0.05
72 °
Gustin, Monday, 31 August
Climate normal for this date — 60-year average.
Average high72°
Average low62°
Average precipitation0.05 in
Chance of precipitation22%
Record high83° (2024)
Record low51° (2023)
Tue, 0171° / 63°0.07
71 °
Gustin, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low63°
Average precipitation0.07 in
Chance of precipitation27%
Record high82° (1973)
Record low51° (2017)
Wed, 0272° / 63°0.08
72 °
Gustin, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high72°
Average low63°
Average precipitation0.08 in
Chance of precipitation35%
Record high84° (2011)
Record low49° (2017)
Thu, 0372° / 62°0.11
72 °
Gustin, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high72°
Average low62°
Average precipitation0.11 in
Chance of precipitation37%
Record high88° (2023)
Record low51° (2017)
Fri, 0471° / 62°0.08
71 °
Gustin, Friday, 4 September
Climate normal for this date — 60-year average.
Average high71°
Average low62°
Average precipitation0.08 in
Chance of precipitation32%
Record high89° (2023)
Record low46° (2025)
Sat, 0571° / 62°0.11
71 °
Gustin, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high71°
Average low62°
Average precipitation0.11 in
Chance of precipitation37%
Record high87° (2018)
Record low50° (2019)
Sun, 0671° / 62°0.06
71 °
Gustin, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high71°
Average low62°
Average precipitation0.06 in
Chance of precipitation33%
Record high82° (1969)
Record low48° (2017)
Mon, 0770° / 61°0.08
70 °
Gustin, Monday, 7 September
Climate normal for this date — 60-year average.
Average high70°
Average low61°
Average precipitation0.08 in
Chance of precipitation48%
Record high82° (1960)
Record low45° (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 Gustin, 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 Gustin, 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.