Monthly outlook for Penn, PA: average high 63.8°, average low 44.9°. That is 0.4° above the climate normal for October. Precipitation is expected on 4 days (about 3.1 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 13 October (79.8°), the coolest 19 October (32.3°).
63.8°/44.9°
Average high / low
+0.4°
Above normal
4 / 4
Wet days / normal
3.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
66.2°
64.2°
+1.1°
19 October – 28 October
59.6°
60.2°
-0.3°
29 October – 7 November
at normal
57.1°
—
October records over 66 years
88°9 October 2007All-time high
17.6°30 October 2011All-time low
Climate normals and records are computed from the nearest reference point — Shippensburg University (10 mi).
Sat, 1072° / 45°0
72 °
Penn, Saturday, 10 October
Overcast. High 72°, low 45°.
Pressure30.45 inHg
Wind6 mph E
Humidity55%
Visibility6.2 mi
Dew point49°
Sun, 1164° / 50°0.98
64 °
Penn, Sunday, 11 October
Rain. High 64°, low 50°.
Pressure30.12 inHg
Wind10.9 mph E
Humidity97%
Visibility3.4 mi
Dew point59°
Mon, 1273° / 59°0
73 °
Penn, Monday, 12 October
Light rain. High 73°, low 59°.
Pressure29.85 inHg
Wind12.2 mph NW
Humidity69%
Visibility6.2 mi
Dew point60°
Tue, 1380° / 58°0
80 °
Penn, Tuesday, 13 October
Light rain. High 80°, low 58°.
Pressure29.80 inHg
Wind9.3 mph SW
Humidity72%
Visibility6.2 mi
Dew point64°
Wed, 1469° / 56°0.02
69 °
Penn, Wednesday, 14 October
Light rain. High 69°, low 56°.
Pressure29.97 inHg
Wind6.3 mph N
Humidity80%
Visibility—
Dew point59°
Thu, 1560° / 45°0
60 °
Penn, Thursday, 15 October
Mostly clear. High 60°, low 45°.
Pressure30.27 inHg
Wind5.9 mph SE
Humidity55%
Visibility—
Dew point39°
Fri, 1669° / 50°0.15
69 °
Penn, Friday, 16 October
Light rain. High 69°, low 50°.
Pressure29.91 inHg
Wind18.1 mph W
Humidity96%
Visibility—
Dew point55°
Sat, 1753° / 44°0
53 °
Penn, Saturday, 17 October
Clear. High 53°, low 44°.
Pressure29.94 inHg
Wind20.1 mph W
Humidity50%
Visibility—
Dew point33°
Sun, 1851° / 36°0
51 °
Penn, Sunday, 18 October
Clear. High 51°, low 36°.
Pressure30.36 inHg
Wind10.9 mph NW
Humidity51%
Visibility—
Dew point27°
Mon, 1954° / 32°0
54 °
Penn, Monday, 19 October
Mostly clear. High 54°, low 32°.
Pressure30.50 inHg
Wind6.4 mph S
Humidity45%
Visibility—
Dew point25°
Tue, 2059° / 35°0
59 °
Penn, Tuesday, 20 October
Clear. High 59°, low 35°.
Pressure30.50 inHg
Wind3.2 mph NE
Humidity50%
Visibility—
Dew point31°
Wed, 2161° / 39°0
61 °
Penn, Wednesday, 21 October
Clear. High 61°, low 39°.
Pressure30.56 inHg
Wind7.1 mph SE
Humidity59%
Visibility—
Dew point38°
Thu, 2263° / 42°0
63 °
Penn, Thursday, 22 October
Overcast. High 63°, low 42°.
Pressure30.39 inHg
Wind9.5 mph S
Humidity69%
Visibility—
Dew point44°
Fri, 2363° / 45°0.36
63 °
Penn, Friday, 23 October
Rain. High 63°, low 45°.
Pressure30.12 inHg
Wind12.3 mph S
Humidity86%
Visibility—
Dew point52°
Sat, 2458° / 39°1.63
58 °
Penn, Saturday, 24 October
Heavy rain. High 58°, low 39°.
Pressure29.85 inHg
Wind17.2 mph NW
Humidity94%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2559° / 44°0.15
59 °
Penn, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.15 in
Chance of precipitation28%
Record high76° (2021)
Record low32° (1962)
Mon, 2659° / 44°0.1
59 °
Penn, Monday, 26 October
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.1 in
Chance of precipitation30%
Record high79° (1963)
Record low31° (1960)
Tue, 2759° / 44°0.17
59 °
Penn, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.17 in
Chance of precipitation25%
Record high80° (1963)
Record low30° (1976)
Wed, 2859° / 43°0.09
59 °
Penn, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.09 in
Chance of precipitation30%
Record high78° (1984)
Record low27° (1976)
Thu, 2957° / 41°0.21
57 °
Penn, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high57°
Average low41°
Average precipitation0.21 in
Chance of precipitation28%
Record high72° (1971)
Record low28° (1965)
Fri, 3058° / 40°0.1
58 °
Penn, Friday, 30 October
Climate normal for this date — 60-year average.
Average high58°
Average low40°
Average precipitation0.1 in
Chance of precipitation25%
Record high76° (2016)
Record low18° (2011)
Sat, 3158° / 41°0.07
58 °
Penn, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.07 in
Chance of precipitation23%
Record high78° (2024)
Record low28° (1988)
Sun, 0159° / 43°0.06
59 °
Penn, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.06 in
Chance of precipitation25%
Record high77° (1974)
Record low23° (2002)
Mon, 0259° / 43°0.14
59 °
Penn, Monday, 2 November
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.14 in
Chance of precipitation32%
Record high77° (1982)
Record low29° (2023)
Tue, 0358° / 42°0.06
58 °
Penn, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.06 in
Chance of precipitation28%
Record high77° (2003)
Record low29° (2002)
Wed, 0456° / 40°0.08
56 °
Penn, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.08 in
Chance of precipitation18%
Record high77° (2003)
Record low24° (1962)
Thu, 0556° / 41°0.12
56 °
Penn, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.12 in
Chance of precipitation28%
Record high74° (1994)
Record low25° (1991)
Fri, 0655° / 41°0.06
55 °
Penn, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.06 in
Chance of precipitation30%
Record high79° (2024)
Record low26° (1991)
Sat, 0754° / 40°0.09
54 °
Penn, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.09 in
Chance of precipitation25%
Record high71° (1975)
Record low27° (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, 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.