Monthly outlook for Harmon City Heights, MI: average high 74.6°, average low 60.6°. That is 0.2° below the climate normal for August. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 10 August (84.5°), the coolest 14 August (53.8°).
74.6°/60.6°
Average high / low
−0.2°
Below normal
4 / 5
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
75.3°
75.4°
-0°
19 August – 28 August
73.3°
74.5°
-0.7°
29 August – 7 September
at normal
72.9°
—
August records over 66 years
92.8°8 August 2001All-time high
48°27 August 2025All-time low
Climate normals and records are computed from the nearest reference point — East Tawas (11 mi).
Mon, 1085° / 71°0.06
85 °
Harmon City Heights, Monday, 10 August
Light rain. High 85°, low 71°.
Pressure29.88 inHg
Wind6.8 mph SW
Humidity67%
Visibility6.2 mi
Dew point66°
Tue, 1177° / 68°0.01
77 °
Harmon City Heights, Tuesday, 11 August
Light rain. High 77°, low 68°.
Pressure29.97 inHg
Wind4.6 mph SE
Humidity55%
Visibility6.2 mi
Dew point56°
Wed, 1281° / 63°0.01
81 °
Harmon City Heights, Wednesday, 12 August
Light rain. High 81°, low 63°.
Pressure29.74 inHg
Wind3.7 mph W
Humidity57%
Visibility6.2 mi
Dew point62°
Thu, 1375° / 59°0
75 °
Harmon City Heights, Thursday, 13 August
Partly cloudy. High 75°, low 59°.
Pressure29.97 inHg
Wind8.8 mph NW
Humidity39%
Visibility6.2 mi
Dew point45°
Fri, 1471° / 54°0
71 °
Harmon City Heights, Friday, 14 August
Clear. High 71°, low 54°.
Pressure30.15 inHg
Wind10.7 mph E
Humidity45%
Visibility—
Dew point47°
Sat, 1570° / 56°0
70 °
Harmon City Heights, Saturday, 15 August
Overcast. High 70°, low 56°.
Pressure30.33 inHg
Wind12 mph E
Humidity59%
Visibility—
Dew point53°
Sun, 1666° / 57°0.62
66 °
Harmon City Heights, Sunday, 16 August
Rain. High 66°, low 57°.
Pressure30.06 inHg
Wind12.3 mph SE
Humidity70%
Visibility—
Dew point54°
Mon, 1774° / 61°0
74 °
Harmon City Heights, Monday, 17 August
Overcast. High 74°, low 61°.
Pressure30.00 inHg
Wind6.4 mph NW
Humidity52%
Visibility—
Dew point54°
Tue, 1874° / 63°0
74 °
Harmon City Heights, Tuesday, 18 August
Overcast. High 74°, low 63°.
Pressure29.88 inHg
Wind12.7 mph SW
Humidity56%
Visibility—
Dew point56°
Wed, 1976° / 64°0.3
76 °
Harmon City Heights, Wednesday, 19 August
Rain. High 76°, low 64°.
Pressure29.62 inHg
Wind16 mph N
Humidity67%
Visibility—
Dew point63°
Thu, 2070° / 55°0
70 °
Harmon City Heights, Thursday, 20 August
Partly cloudy. High 70°, low 55°.
Pressure29.91 inHg
Wind11.1 mph E
Humidity45%
Visibility—
Dew point46°
Fri, 2174° / 59°0
74 °
Harmon City Heights, Friday, 21 August
Overcast. High 74°, low 59°.
Pressure29.80 inHg
Wind10.7 mph S
Humidity42%
Visibility—
Dew point48°
Sat, 2272° / 64°0.94
72 °
Harmon City Heights, Saturday, 22 August
Rain. High 72°, low 64°.
Pressure29.65 inHg
Wind18.7 mph NW
Humidity80%
Visibility—
Dew point65°
Sun, 2373° / 59°0
73 °
Harmon City Heights, Sunday, 23 August
Light rain. High 73°, low 59°.
Pressure30.03 inHg
Wind16.1 mph N
Humidity41%
Visibility—
Dew point46°
Mon, 2475° / 57°0
75 °
Harmon City Heights, Monday, 24 August
Partly cloudy. High 75°, low 57°.
Pressure30.21 inHg
Wind10.8 mph S
Humidity45%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2575° / 64°0.09
75 °
Harmon City Heights, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.09 in
Chance of precipitation22%
Record high87° (2021)
Record low50° (2017)
Wed, 2675° / 64°0.13
75 °
Harmon City Heights, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.13 in
Chance of precipitation33%
Record high87° (2024)
Record low50° (2025)
Thu, 2775° / 65°0.13
75 °
Harmon City Heights, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.13 in
Chance of precipitation40%
Record high89° (1973)
Record low48° (2025)
Fri, 2874° / 64°0.11
74 °
Harmon City Heights, Friday, 28 August
Climate normal for this date — 60-year average.
Average high74°
Average low64°
Average precipitation0.11 in
Chance of precipitation38%
Record high89° (1973)
Record low49° (1986)
Sat, 2974° / 63°0.13
74 °
Harmon City Heights, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high74°
Average low63°
Average precipitation0.13 in
Chance of precipitation42%
Record high88° (1991)
Record low49° (2025)
Sun, 3074° / 63°0.08
74 °
Harmon City Heights, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high74°
Average low63°
Average precipitation0.08 in
Chance of precipitation33%
Record high86° (1973)
Record low49° (2025)
Mon, 3173° / 62°0.04
73 °
Harmon City Heights, Monday, 31 August
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.04 in
Chance of precipitation25%
Record high85° (2010)
Record low49° (2023)
Tue, 0173° / 62°0.07
73 °
Harmon City Heights, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.07 in
Chance of precipitation28%
Record high85° (1973)
Record low49° (2017)
Wed, 0273° / 62°0.08
73 °
Harmon City Heights, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.08 in
Chance of precipitation32%
Record high86° (2011)
Record low48° (2017)
Thu, 0373° / 62°0.12
73 °
Harmon City Heights, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.12 in
Chance of precipitation33%
Record high86° (1973)
Record low52° (2017)
Fri, 0473° / 61°0.09
73 °
Harmon City Heights, Friday, 4 September
Climate normal for this date — 60-year average.
Average high73°
Average low61°
Average precipitation0.09 in
Chance of precipitation32%
Record high87° (2023)
Record low46° (2025)
Sat, 0572° / 61°0.08
72 °
Harmon City Heights, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high72°
Average low61°
Average precipitation0.08 in
Chance of precipitation25%
Record high86° (2018)
Record low49° (2019)
Sun, 0672° / 61°0.08
72 °
Harmon City Heights, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high72°
Average low61°
Average precipitation0.08 in
Chance of precipitation43%
Record high84° (1998)
Record low48° (2020)
Mon, 0772° / 60°0.09
72 °
Harmon City Heights, Monday, 7 September
Climate normal for this date — 60-year average.
Average high72°
Average low60°
Average precipitation0.09 in
Chance of precipitation42%
Record high84° (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 Harmon City Heights, 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 Harmon City Heights, 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.