Monthly outlook for Germantown, PA: average high 75.3°, average low 55.3°. That is 2.6° below the climate normal for August. Precipitation is expected on 6 days (about 0.6 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 11 August (82.4°), the coolest 15 August (47.4°).
75.3°/55.3°
Average high / low
−2.6°
Below normal
6 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
74.8°
80.7°
-3.3°
19 August – 28 August
76°
79.3°
-1.8°
29 August – 7 September
at normal
77.6°
—
August records over 66 years
98.1°9 August 2001All-time high
46.4°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Milford (15 mi).
Mon, 1078° / 63°0
78 °
Germantown, Monday, 10 August
Light rain. High 78°, low 63°.
Pressure29.97 inHg
Wind8.7 mph W
Humidity40%
Visibility6.2 mi
Dew point58°
Tue, 1182° / 62°0.11
82 °
Germantown, Tuesday, 11 August
Light rain. High 82°, low 62°.
Pressure29.88 inHg
Wind11.5 mph NW
Humidity48%
Visibility6.2 mi
Dew point58°
Wed, 1280° / 57°0.02
80 °
Germantown, Wednesday, 12 August
Light rain. High 80°, low 57°.
Pressure29.83 inHg
Wind3.8 mph SW
Humidity37%
Visibility6.2 mi
Dew point52°
Thu, 1376° / 57°0.05
76 °
Germantown, Thursday, 13 August
Light rain. High 76°, low 57°.
Pressure29.80 inHg
Wind13.1 mph NW
Humidity38%
Visibility6.2 mi
Dew point48°
Fri, 1471° / 53°0
71 °
Germantown, Friday, 14 August
Clear. High 71°, low 53°.
Pressure30.00 inHg
Wind11.7 mph NW
Humidity37%
Visibility—
Dew point42°
Sat, 1571° / 47°0
71 °
Germantown, Saturday, 15 August
Clear. High 71°, low 47°.
Pressure30.15 inHg
Wind12.3 mph N
Humidity37%
Visibility—
Dew point41°
Sun, 1671° / 49°0
71 °
Germantown, Sunday, 16 August
Overcast. High 71°, low 49°.
Pressure30.15 inHg
Wind3.9 mph NW
Humidity42%
Visibility—
Dew point45°
Mon, 1759° / 54°0.11
59 °
Germantown, Monday, 17 August
Light rain. High 59°, low 54°.
Pressure29.94 inHg
Wind4.2 mph NW
Humidity99%
Visibility—
Dew point58°
Tue, 1878° / 53°0
78 °
Germantown, Tuesday, 18 August
Overcast. High 78°, low 53°.
Pressure29.94 inHg
Wind7.2 mph N
Humidity39%
Visibility—
Dew point48°
Wed, 1977° / 60°0.05
77 °
Germantown, Wednesday, 19 August
Light rain. High 77°, low 60°.
Pressure29.85 inHg
Wind9.8 mph S
Humidity54%
Visibility—
Dew point56°
Thu, 2073° / 54°0.06
73 °
Germantown, Thursday, 20 August
Light rain. High 73°, low 54°.
Pressure29.77 inHg
Wind10.5 mph NW
Humidity55%
Visibility—
Dew point55°
Fri, 2177° / 51°0
77 °
Germantown, Friday, 21 August
Clear. High 77°, low 51°.
Pressure29.85 inHg
Wind6.8 mph N
Humidity34%
Visibility—
Dew point44°
Sat, 2282° / 53°0.01
82 °
Germantown, Saturday, 22 August
Light rain. High 82°, low 53°.
Pressure29.91 inHg
Wind11.2 mph SW
Humidity39%
Visibility—
Dew point51°
Sun, 2375° / 56°0.19
75 °
Germantown, Sunday, 23 August
Light rain. High 75°, low 56°.
Pressure29.88 inHg
Wind12.9 mph W
Humidity64%
Visibility—
Dew point57°
Mon, 2472° / 50°0
72 °
Germantown, Monday, 24 August
Clear. High 72°, low 50°.
Pressure30.18 inHg
Wind8.1 mph N
Humidity35%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 62°0.09
80 °
Germantown, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.09 in
Chance of precipitation25%
Record high92° (2007)
Record low51° (1987)
Wed, 2680° / 62°0.07
80 °
Germantown, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high92° (1993)
Record low52° (1989)
Thu, 2780° / 64°0.2
80 °
Germantown, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.2 in
Chance of precipitation37%
Record high93° (1993)
Record low53° (1969)
Fri, 2880° / 64°0.23
80 °
Germantown, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.23 in
Chance of precipitation37%
Record high92° (1973)
Record low51° (2025)
Sat, 2979° / 64°0.14
79 °
Germantown, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.14 in
Chance of precipitation35%
Record high90° (1973)
Record low46° (1982)
Sun, 3079° / 63°0.06
79 °
Germantown, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.06 in
Chance of precipitation22%
Record high92° (1991)
Record low47° (1986)
Mon, 3178° / 62°0.06
78 °
Germantown, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (2012)
Record low48° (1965)
Tue, 0177° / 61°0.14
77 °
Germantown, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.14 in
Chance of precipitation30%
Record high91° (2010)
Record low49° (1967)
Wed, 0277° / 61°0.12
77 °
Germantown, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.12 in
Chance of precipitation33%
Record high94° (2010)
Record low47° (2017)
Thu, 0378° / 61°0.14
78 °
Germantown, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.14 in
Chance of precipitation32%
Record high92° (2015)
Record low49° (1967)
Fri, 0478° / 62°0.14
78 °
Germantown, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.14 in
Chance of precipitation30%
Record high91° (2008)
Record low49° (1997)
Sat, 0577° / 61°0.08
77 °
Germantown, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.08 in
Chance of precipitation30%
Record high90° (2023)
Record low50° (1974)
Sun, 0676° / 61°0.21
76 °
Germantown, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.21 in
Chance of precipitation32%
Record high91° (2023)
Record low48° (2000)
Mon, 0777° / 60°0.13
77 °
Germantown, Monday, 7 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.13 in
Chance of precipitation32%
Record high93° (2015)
Record low46° (1984)
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 Germantown, PA 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 Germantown, PA 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.