Monthly outlook for Penn, MI: average high 76.1°, average low 59.6°. That is 1.6° below the climate normal for August. Precipitation is expected on 4 days (about 5.1 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 9 August (84.5°), the coolest 21 August (51.4°).
76.1°/59.6°
Average high / low
−1.6°
Below normal
4 / 6
Wet days / normal
5.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
77.6°
79.3°
-0.9°
18 August – 27 August
73.7°
79°
-3°
28 August – 6 September
at normal
77.6°
—
August records over 66 years
95.2°1 August 2006All-time high
46°15 August 1964All-time low
Climate normals and records are computed from the nearest reference point — Dowagiac (9 mi).
Sun, 0984° / 63°2.42
84 °
Penn, Sunday, 9 August
Heavy rain. High 84°, low 63°.
Pressure29.97 inHg
Wind13.6 mph S
Humidity47%
Visibility6.2 mi
Dew point59°
Mon, 1082° / 66°1.52
82 °
Penn, Monday, 10 August
Heavy rain. High 82°, low 66°.
Pressure29.97 inHg
Wind5.3 mph W
Humidity84%
Visibility6.2 mi
Dew point68°
Tue, 1180° / 63°1.12
80 °
Penn, Tuesday, 11 August
Heavy rain. High 80°, low 63°.
Pressure29.80 inHg
Wind8.7 mph NW
Humidity96%
Visibility—
Dew point62°
Wed, 1279° / 63°0
79 °
Penn, Wednesday, 12 August
Overcast. High 79°, low 63°.
Pressure29.83 inHg
Wind5.1 mph N
Humidity74%
Visibility6.2 mi
Dew point67°
Thu, 1370° / 56°0
70 °
Penn, Thursday, 13 August
Overcast. High 70°, low 56°.
Pressure30.03 inHg
Wind7.3 mph NE
Humidity57%
Visibility—
Dew point51°
Fri, 1474° / 55°0
74 °
Penn, Friday, 14 August
Clear. High 74°, low 55°.
Pressure30.12 inHg
Wind9 mph NW
Humidity54%
Visibility—
Dew point54°
Sat, 1573° / 56°0
73 °
Penn, Saturday, 15 August
Overcast. High 73°, low 56°.
Pressure30.30 inHg
Wind7.7 mph E
Humidity58%
Visibility—
Dew point54°
Sun, 1674° / 56°0
74 °
Penn, Sunday, 16 August
Overcast. High 74°, low 56°.
Pressure30.15 inHg
Wind5.8 mph SE
Humidity65%
Visibility—
Dew point60°
Mon, 1777° / 63°0.05
77 °
Penn, Monday, 17 August
Light rain. High 77°, low 63°.
Pressure30.06 inHg
Wind8.3 mph NW
Humidity72%
Visibility—
Dew point63°
Tue, 1881° / 61°0
81 °
Penn, Tuesday, 18 August
Overcast. High 81°, low 61°.
Pressure30.00 inHg
Wind9.1 mph SW
Humidity62%
Visibility—
Dew point63°
Wed, 1971° / 63°0.01
71 °
Penn, Wednesday, 19 August
Light rain. High 71°, low 63°.
Pressure29.85 inHg
Wind15.8 mph NW
Humidity70%
Visibility—
Dew point61°
Thu, 2070° / 57°0
70 °
Penn, Thursday, 20 August
Overcast. High 70°, low 57°.
Pressure29.97 inHg
Wind15 mph NW
Humidity58%
Visibility—
Dew point54°
Fri, 2172° / 51°0
72 °
Penn, Friday, 21 August
Clear. High 72°, low 51°.
Pressure30.09 inHg
Wind7.2 mph N
Humidity47%
Visibility—
Dew point47°
Sat, 2269° / 53°0.01
69 °
Penn, Saturday, 22 August
Light rain. High 69°, low 53°.
Pressure29.94 inHg
Wind14.7 mph SE
Humidity67%
Visibility—
Dew point56°
Sun, 2379° / 63°0
79 °
Penn, Sunday, 23 August
Clear. High 79°, low 63°.
Pressure29.88 inHg
Wind17.2 mph W
Humidity50%
Visibility—
Dew point57°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2479° / 63°0.15
79 °
Penn, Monday, 24 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.15 in
Chance of precipitation33%
Record high91° (1968)
Record low53° (1965)
Tue, 2579° / 63°0.1
79 °
Penn, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.1 in
Chance of precipitation27%
Record high90° (2012)
Record low51° (2017)
Wed, 2680° / 64°0.14
80 °
Penn, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.14 in
Chance of precipitation30%
Record high92° (2024)
Record low53° (2025)
Thu, 2780° / 64°0.14
80 °
Penn, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.14 in
Chance of precipitation40%
Record high94° (2024)
Record low50° (2025)
Fri, 2879° / 64°0.16
79 °
Penn, Friday, 28 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.16 in
Chance of precipitation35%
Record high90° (2021)
Record low48° (1986)
Sat, 2978° / 63°0.12
78 °
Penn, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.12 in
Chance of precipitation38%
Record high91° (1984)
Record low46° (1965)
Sun, 3078° / 62°0.07
78 °
Penn, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.07 in
Chance of precipitation30%
Record high89° (1970)
Record low48° (1986)
Mon, 3178° / 62°0.09
78 °
Penn, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.09 in
Chance of precipitation23%
Record high90° (2012)
Record low47° (2009)
Tue, 0178° / 61°0.13
78 °
Penn, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.13 in
Chance of precipitation33%
Record high91° (2011)
Record low48° (1967)
Wed, 0278° / 62°0.08
78 °
Penn, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.08 in
Chance of precipitation28%
Record high91° (2008)
Record low49° (2017)
Thu, 0378° / 62°0.07
78 °
Penn, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high89° (1973)
Record low46° (1974)
Fri, 0476° / 61°0.07
76 °
Penn, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.07 in
Chance of precipitation30%
Record high89° (1999)
Record low47° (1997)
Sat, 0577° / 61°0.07
77 °
Penn, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.07 in
Chance of precipitation23%
Record high89° (1999)
Record low47° (1974)
Sun, 0676° / 61°0.07
76 °
Penn, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.07 in
Chance of precipitation35%
Record high90° (1990)
Record low45° (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 Penn, 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 Penn, 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.