As of 00:40 EDT

Weather in Penn, PA

72°

Penn, Sunday, 9 August, 00:40

Clear. Feels like 74°. High 84°, low 69°.

Pressure30.00 inHg

Wind2.4 mph SW

Humidity90%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

Monthly outlook for Penn, PA: average high 80.4°, average low 60.3°. That is 0.7° below the climate normal for August. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 23 August (87.9°), the coolest 22 August (48.8°).

80.4°/60.3°

Average high / low

−0.7°

Below normal

4 / 5

Wet days / normal

1.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	80.4°	82.4°	-1.1°
19 August – 28 August	80.5°	81.2°	-0.4°
29 August – 7 September	at normal	79.6°	—

August records over 66 years

97.5°12 August 2021All-time high

47.1°29 August 1982All-time low

Climate normals and records are computed from the nearest reference point — Newton Hamilton (15 mi).

Mon, 1087° / 68°

0.14

87 °

Penn, Monday, 10 August

Rain. High 87°, low 68°.

Pressure30.03 inHg

Wind6.8 mph SW

Humidity81%

Visibility6.2 mi

Dew point67°

Tue, 1184° / 65°

0.22

84 °

Penn, Tuesday, 11 August

Rain. High 84°, low 65°.

Pressure29.94 inHg

Wind6.1 mph W

Humidity57%

Visibility6.2 mi

Dew point64°

Wed, 1282° / 66°

82 °

Penn, Wednesday, 12 August

Light rain. High 82°, low 66°.

Pressure29.77 inHg

Wind6.4 mph W

Humidity77%

Visibility6.2 mi

Dew point67°

Thu, 1376° / 62°

76 °

Penn, Thursday, 13 August

Partly cloudy. High 76°, low 62°.

Pressure29.88 inHg

Wind13.2 mph NW

Humidity38%

Visibility—

Dew point48°

Fri, 1477° / 52°

77 °

Penn, Friday, 14 August

Clear. High 77°, low 52°.

Pressure30.03 inHg

Wind10.2 mph NW

Humidity36%

Visibility—

Dew point46°

Sat, 1579° / 52°

79 °

Penn, Saturday, 15 August

Mostly clear. High 79°, low 52°.

Pressure30.18 inHg

Wind8.5 mph NW

Humidity35%

Visibility—

Dew point45°

Sun, 1681° / 54°

81 °

Penn, Sunday, 16 August

Overcast. High 81°, low 54°.

Pressure30.18 inHg

Wind2.6 mph E

Humidity40%

Visibility—

Dew point51°

Mon, 1775° / 59°

0.02

75 °

Penn, Monday, 17 August

Light rain. High 75°, low 59°.

Pressure30.06 inHg

Wind5.9 mph SE

Humidity60%

Visibility—

Dew point59°

Tue, 1877° / 64°

77 °

Penn, Tuesday, 18 August

Overcast. High 77°, low 64°.

Pressure30.03 inHg

Wind3.9 mph E

Humidity63%

Visibility—

Dew point61°

Wed, 1984° / 64°

0.56

84 °

Penn, Wednesday, 19 August

Heavy rain. High 84°, low 64°.

Pressure29.85 inHg

Wind8 mph S

Humidity59%

Visibility—

Dew point63°

Thu, 2072° / 62°

0.2

72 °

Penn, Thursday, 20 August

Rain. High 72°, low 62°.

Pressure29.77 inHg

Wind14.7 mph NW

Humidity56%

Visibility—

Dew point54°

Fri, 2177° / 51°

77 °

Penn, Friday, 21 August

Clear. High 77°, low 51°.

Pressure29.91 inHg

Wind11 mph NW

Humidity34%

Visibility—

Dew point44°

Sat, 2278° / 49°

78 °

Penn, Saturday, 22 August

Partly cloudy. High 78°, low 49°.

Pressure30.06 inHg

Wind3.7 mph S

Humidity32%

Visibility—

Dew point43°

Sun, 2388° / 61°

0.03

88 °

Penn, Sunday, 23 August

Light rain. High 88°, low 61°.

Pressure29.88 inHg

Wind11.5 mph W

Humidity55%

Visibility—

Dew point65°

Mon, 2483° / 66°

83 °

Penn, Monday, 24 August

Clear. High 83°, low 66°.

Pressure29.94 inHg

Wind11.7 mph W

Humidity40%

Visibility—

Dew point54°

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

Tue, 2582° / 63°

0.04

82 °

Penn, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low63°

Average precipitation0.04 in

Chance of precipitation20%

Record high92° (2007)

Record low51° (1987)

Wed, 2682° / 64°

0.04

82 °

Penn, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low64°

Average precipitation0.04 in

Chance of precipitation20%

Record high92° (1975)

Record low53° (1963)

Thu, 2782° / 64°

0.11

82 °

Penn, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°

Average low64°

Average precipitation0.11 in

Chance of precipitation33%

Record high94° (1993)

Record low53° (2025)

Fri, 2882° / 65°

0.19

82 °

Penn, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.19 in

Chance of precipitation32%

Record high94° (2024)

Record low51° (2025)

Sat, 2981° / 64°

0.1

81 °

Penn, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.1 in

Chance of precipitation32%

Record high92° (2010)

Record low47° (1982)

Sun, 3081° / 63°

0.07

81 °

Penn, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high81°

Average low63°

Average precipitation0.07 in

Chance of precipitation32%

Record high93° (1991)

Record low49° (2025)

Mon, 3180° / 63°

0.13

80 °

Penn, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.13 in

Chance of precipitation27%

Record high94° (2010)

Record low50° (1976)

Tue, 0179° / 62°

0.14

79 °

Penn, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.14 in

Chance of precipitation32%

Record high95° (2010)

Record low48° (1967)

Wed, 0280° / 62°

0.08

80 °

Penn, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°

Average low62°

Average precipitation0.08 in

Chance of precipitation32%

Record high97° (2010)

Record low51° (1970)

Thu, 0380° / 62°

0.1

80 °

Penn, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°

Average low62°

Average precipitation0.1 in

Chance of precipitation30%

Record high95° (2010)

Record low48° (1967)

Fri, 0480° / 62°

0.09

80 °

Penn, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°

Average low62°

Average precipitation0.09 in

Chance of precipitation25%

Record high93° (2023)

Record low49° (2024)

Sat, 0579° / 62°

0.09

79 °

Penn, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.09 in

Chance of precipitation25%

Record high92° (2023)

Record low49° (1974)

Sun, 0678° / 61°

0.17

78 °

Penn, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°

Average low61°

Average precipitation0.17 in

Chance of precipitation28%

Record high93° (2023)

Record low49° (2000)

Mon, 0779° / 61°

0.13

79 °

Penn, Monday, 7 September

Climate normal for this date — 60-year average.

Average high79°

Average low61°

Average precipitation0.13 in

Chance of precipitation20%

Record high93° (2016)

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 Penn, 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, 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.