As of 08:50 EDT

Weather in Penn Allen, PA

77°

Penn Allen, Sunday, 9 August, 08:50

Overcast. Feels like 78°. High 84°, low 71°.

Pressure30.00 inHg

Wind3 mph W

Humidity81%

Visibility6.2 mi

Dew point71°

See detailed hourly forecast

Monthly outlook for Penn Allen, PA: average high 82.4°, average low 62.3°. That is 0.7° above the climate normal for August. Precipitation is expected on 5 days (about 0.9 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 23 August (92.8°), the coolest 16 August (51.7°).

82.4°/62.3°

Average high / low

+0.7°

Above normal

5 / 6

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	78.7°	81.9°	-1.8°
19 August – 28 August	88.5°	80.5°	+4.5°
29 August – 7 September	at normal	79°	—

August records over 66 years

97.7°2 August 2006All-time high

44.6°30 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Stiles (9 mi).

Mon, 1084° / 69°

0.02

84 °

Penn Allen, Monday, 10 August

Light rain. High 84°, low 69°.

Pressure29.97 inHg

Wind6.9 mph SW

Humidity50%

Visibility6.2 mi

Dew point64°

Tue, 1186° / 67°

0.07

86 °

Penn Allen, Tuesday, 11 August

Light rain. High 86°, low 67°.

Pressure29.88 inHg

Wind10.6 mph NW

Humidity55%

Visibility6.2 mi

Dew point65°

Wed, 1283° / 62°

0.02

83 °

Penn Allen, Wednesday, 12 August

Light rain. High 83°, low 62°.

Pressure29.85 inHg

Wind1.8 mph W

Humidity56%

Visibility6.2 mi

Dew point60°

Thu, 1380° / 63°

0.01

80 °

Penn Allen, Thursday, 13 August

Light rain. High 80°, low 63°.

Pressure29.80 inHg

Wind16.4 mph NW

Humidity34%

Visibility—

Dew point48°

Fri, 1476° / 55°

76 °

Penn Allen, Friday, 14 August

Overcast. High 76°, low 55°.

Pressure30.00 inHg

Wind10.4 mph NW

Humidity37%

Visibility—

Dew point46°

Sat, 1575° / 52°

75 °

Penn Allen, Saturday, 15 August

Clear. High 75°, low 52°.

Pressure30.15 inHg

Wind13.8 mph N

Humidity36%

Visibility—

Dew point44°

Sun, 1672° / 52°

72 °

Penn Allen, Sunday, 16 August

Overcast. High 72°, low 52°.

Pressure30.18 inHg

Wind4.2 mph N

Humidity45%

Visibility—

Dew point48°

Mon, 1764° / 58°

0.1

64 °

Penn Allen, Monday, 17 August

Light rain. High 64°, low 58°.

Pressure29.91 inHg

Wind6.3 mph NE

Humidity96%

Visibility—

Dew point61°

Tue, 1881° / 55°

81 °

Penn Allen, Tuesday, 18 August

Overcast. High 81°, low 55°.

Pressure29.94 inHg

Wind7 mph N

Humidity38%

Visibility—

Dew point50°

Wed, 1981° / 60°

0.09

81 °

Penn Allen, Wednesday, 19 August

Light rain. High 81°, low 60°.

Pressure29.85 inHg

Wind10.7 mph S

Humidity52%

Visibility—

Dew point58°

Thu, 2087° / 67°

0.03

87 °

Penn Allen, Thursday, 20 August

Light rain. High 87°, low 67°.

Pressure30.03 inHg

Wind7.2 mph SW

Humidity40%

Visibility—

Dew point57°

Fri, 2191° / 65°

0.13

91 °

Penn Allen, Friday, 21 August

Rain. High 91°, low 65°.

Pressure29.83 inHg

Wind11.1 mph SW

Humidity48%

Visibility—

Dew point65°

Sat, 2290° / 68°

0.03

90 °

Penn Allen, Saturday, 22 August

Light rain. High 90°, low 68°.

Pressure29.91 inHg

Wind7 mph N

Humidity35%

Visibility—

Dew point56°

Sun, 2393° / 64°

93 °

Penn Allen, Sunday, 23 August

Clear. High 93°, low 64°.

Pressure29.94 inHg

Wind7 mph W

Humidity36%

Visibility—

Dew point58°

Mon, 2490° / 70°

0.36

90 °

Penn Allen, Monday, 24 August

Rain. High 90°, low 70°.

Pressure29.97 inHg

Wind9.8 mph S

Humidity66%

Visibility—

Dew point69°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 2581° / 62°

0.07

81 °

Penn Allen, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high81°

Average low62°

Average precipitation0.07 in

Chance of precipitation27%

Record high94° (1968)

Record low49° (1971)

Wed, 2682° / 62°

0.06

82 °

Penn Allen, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low62°

Average precipitation0.06 in

Chance of precipitation20%

Record high92° (1993)

Record low50° (1977)

Thu, 2782° / 63°

0.19

82 °

Penn Allen, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°

Average low63°

Average precipitation0.19 in

Chance of precipitation33%

Record high94° (2020)

Record low52° (1963)

Fri, 2881° / 64°

0.19

81 °

Penn Allen, Friday, 28 August

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.19 in

Chance of precipitation40%

Record high93° (1993)

Record low51° (1968)

Sat, 2980° / 64°

0.14

80 °

Penn Allen, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.14 in

Chance of precipitation37%

Record high92° (2010)

Record low45° (1982)

Sun, 3080° / 62°

0.05

80 °

Penn Allen, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high80°

Average low62°

Average precipitation0.05 in

Chance of precipitation27%

Record high92° (1991)

Record low45° (1986)

Mon, 3180° / 62°

0.06

80 °

Penn Allen, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°

Average low62°

Average precipitation0.06 in

Chance of precipitation20%

Record high93° (2010)

Record low46° (1986)

Tue, 0179° / 61°

0.15

79 °

Penn Allen, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high79°

Average low61°

Average precipitation0.15 in

Chance of precipitation30%

Record high93° (2010)

Record low50° (1967)

Wed, 0279° / 61°

0.12

79 °

Penn Allen, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high79°

Average low61°

Average precipitation0.12 in

Chance of precipitation33%

Record high95° (2010)

Record low47° (1970)

Thu, 0379° / 61°

0.14

79 °

Penn Allen, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high79°

Average low61°

Average precipitation0.14 in

Chance of precipitation28%

Record high92° (2015)

Record low45° (1967)

Fri, 0479° / 61°

0.13

79 °

Penn Allen, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°

Average low61°

Average precipitation0.13 in

Chance of precipitation22%

Record high94° (2023)

Record low48° (1987)

Sat, 0578° / 61°

0.07

78 °

Penn Allen, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high78°

Average low61°

Average precipitation0.07 in

Chance of precipitation25%

Record high94° (2023)

Record low48° (1994)

Sun, 0678° / 60°

0.23

78 °

Penn Allen, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°

Average low60°

Average precipitation0.23 in

Chance of precipitation30%

Record high93° (2023)

Record low46° (1984)

Mon, 0778° / 60°

0.13

78 °

Penn Allen, Monday, 7 September

Climate normal for this date — 60-year average.

Average high78°

Average low60°

Average precipitation0.13 in

Chance of precipitation25%

Record high91° (2015)

Record low42° (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 Penn Allen, 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 Penn Allen, 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.