Monthly outlook for Dayton, MI: average high 76°, average low 61.4°. That is 1.1° below the climate normal for August. Precipitation is expected on 3 days (about 4.0 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 9 August (85.4°), the coolest 21 August (53.1°).
76°/61.4°
Average high / low
−1.1°
Below normal
3 / 6
Wet days / normal
4.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
77.6°
78.3°
-0.4°
18 August – 27 August
73.5°
78.1°
-2.6°
28 August – 6 September
at normal
76.9°
—
August records over 66 years
94.1°24 August 2023All-time high
50.9°29 August 2025All-time low
Climate normals and records are computed from the nearest reference point — Bridgman (12 mi).
Sun, 0985° / 64°1.78
85 °
Dayton, Sunday, 9 August
Heavy rain. High 85°, low 64°.
Pressure29.97 inHg
Wind13.8 mph S
Humidity64%
Visibility6.2 mi
Dew point65°
Mon, 1083° / 68°1.47
83 °
Dayton, Monday, 10 August
Heavy rain. High 83°, low 68°.
Pressure29.97 inHg
Wind4.1 mph NW
Humidity77%
Visibility6.2 mi
Dew point68°
Tue, 1181° / 68°0.71
81 °
Dayton, Tuesday, 11 August
Heavy rain. High 81°, low 68°.
Pressure29.83 inHg
Wind3.2 mph S
Humidity98%
Visibility6.2 mi
Dew point71°
Wed, 1277° / 64°0
77 °
Dayton, Wednesday, 12 August
Overcast. High 77°, low 64°.
Pressure29.83 inHg
Wind5.7 mph N
Humidity74%
Visibility6.2 mi
Dew point68°
Thu, 1370° / 57°0
70 °
Dayton, Thursday, 13 August
Overcast. High 70°, low 57°.
Pressure30.03 inHg
Wind6.9 mph NE
Humidity59%
Visibility—
Dew point53°
Fri, 1473° / 57°0
73 °
Dayton, Friday, 14 August
Clear. High 73°, low 57°.
Pressure30.12 inHg
Wind7.9 mph NW
Humidity55%
Visibility—
Dew point54°
Sat, 1574° / 56°0
74 °
Dayton, Saturday, 15 August
Overcast. High 74°, low 56°.
Pressure30.30 inHg
Wind7.5 mph E
Humidity62%
Visibility—
Dew point56°
Sun, 1673° / 58°0
73 °
Dayton, Sunday, 16 August
Overcast. High 73°, low 58°.
Pressure30.15 inHg
Wind5.6 mph SE
Humidity67%
Visibility—
Dew point60°
Mon, 1776° / 63°0.02
76 °
Dayton, Monday, 17 August
Light rain. High 76°, low 63°.
Pressure30.06 inHg
Wind6.2 mph NW
Humidity72%
Visibility—
Dew point64°
Tue, 1882° / 63°0
82 °
Dayton, Tuesday, 18 August
Overcast. High 82°, low 63°.
Pressure30.00 inHg
Wind8.4 mph SW
Humidity65%
Visibility—
Dew point65°
Wed, 1973° / 66°0.01
73 °
Dayton, Wednesday, 19 August
Light rain. High 73°, low 66°.
Pressure29.88 inHg
Wind16.2 mph NW
Humidity74%
Visibility—
Dew point61°
Thu, 2067° / 60°0.01
67 °
Dayton, Thursday, 20 August
Light rain. High 67°, low 60°.
Pressure30.03 inHg
Wind16.1 mph N
Humidity69%
Visibility—
Dew point56°
Fri, 2172° / 53°0
72 °
Dayton, Friday, 21 August
Clear. High 72°, low 53°.
Pressure30.09 inHg
Wind6.5 mph N
Humidity49%
Visibility—
Dew point48°
Sat, 2269° / 53°0.01
69 °
Dayton, Saturday, 22 August
Light rain. High 69°, low 53°.
Pressure29.94 inHg
Wind14.6 mph SE
Humidity77%
Visibility—
Dew point59°
Sun, 2379° / 65°0
79 °
Dayton, Sunday, 23 August
Clear. High 79°, low 65°.
Pressure29.88 inHg
Wind16 mph W
Humidity60%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2478° / 67°0.11
78 °
Dayton, Monday, 24 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.11 in
Chance of precipitation33%
Record high94° (2023)
Record low57° (1967)
Tue, 2578° / 67°0.11
78 °
Dayton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.11 in
Chance of precipitation30%
Record high89° (2024)
Record low54° (2017)
Wed, 2679° / 67°0.14
79 °
Dayton, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low67°
Average precipitation0.14 in
Chance of precipitation35%
Record high94° (2024)
Record low55° (2017)
Thu, 2779° / 68°0.14
79 °
Dayton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low68°
Average precipitation0.14 in
Chance of precipitation35%
Record high92° (2024)
Record low55° (2025)
Fri, 2878° / 67°0.16
78 °
Dayton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.16 in
Chance of precipitation42%
Record high90° (2021)
Record low52° (1986)
Sat, 2978° / 67°0.11
78 °
Dayton, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low67°
Average precipitation0.11 in
Chance of precipitation33%
Record high90° (2022)
Record low51° (2025)
Sun, 3077° / 66°0.07
77 °
Dayton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low66°
Average precipitation0.07 in
Chance of precipitation28%
Record high89° (1995)
Record low55° (2025)
Mon, 3177° / 65°0.09
77 °
Dayton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.09 in
Chance of precipitation23%
Record high87° (1969)
Record low53° (2025)
Tue, 0177° / 65°0.15
77 °
Dayton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.15 in
Chance of precipitation28%
Record high89° (2011)
Record low53° (2017)
Wed, 0277° / 65°0.07
77 °
Dayton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high88° (2008)
Record low51° (2017)
Thu, 0377° / 65°0.07
77 °
Dayton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high88° (2023)
Record low53° (1974)
Fri, 0476° / 65°0.1
76 °
Dayton, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.1 in
Chance of precipitation30%
Record high88° (1999)
Record low54° (1997)
Sat, 0576° / 65°0.08
76 °
Dayton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.08 in
Chance of precipitation30%
Record high89° (2023)
Record low54° (2019)
Sun, 0676° / 64°0.1
76 °
Dayton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.1 in
Chance of precipitation37%
Record high89° (1990)
Record low52° (1962)
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 Dayton, 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 Dayton, 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.