Monthly outlook for Harristown, PA: average high 57.2°, average low 41.2°. That is 2.3° above the climate normal for November. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 6 November (72.3°), the coolest 13 November (26.9°).
57.2°/41.2°
Average high / low
+2.3°
Above normal
1 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
5 November – 14 November
57.1°
54.3°
+1.5°
15 November – 24 November
57.5°
50.5°
+3.9°
25 November – 4 December
at normal
47.9°
—
November records over 66 years
79.5°6 November 2024All-time high
13.1°24 November 1989All-time low
Climate normals and records are computed from the nearest reference point — Lancaster (12 mi).
Fri, 0672° / 57°0
72 °
Harristown, Friday, 6 November
Clear. High 72°, low 57°.
Pressure29.88 inHg
Wind4.8 mph NW
Humidity56%
Visibility6.2 mi
Dew point52°
Sat, 0757° / 47°0
57 °
Harristown, Saturday, 7 November
Clear. High 57°, low 47°.
Pressure29.94 inHg
Wind12.7 mph NW
Humidity53%
Visibility6.2 mi
Dew point37°
Sun, 0858° / 49°0
58 °
Harristown, Sunday, 8 November
Partly cloudy. High 58°, low 49°.
Pressure29.97 inHg
Wind11.7 mph W
Humidity54%
Visibility6.2 mi
Dew point39°
Mon, 0956° / 47°0.01
56 °
Harristown, Monday, 9 November
Light rain. High 56°, low 47°.
Pressure29.94 inHg
Wind17.5 mph NW
Humidity49%
Visibility6.2 mi
Dew point36°
Tue, 1063° / 40°0
63 °
Harristown, Tuesday, 10 November
Partly cloudy. High 63°, low 40°.
Pressure30.03 inHg
Wind12.4 mph SW
Humidity56%
Visibility—
Dew point38°
Wed, 1159° / 44°0
59 °
Harristown, Wednesday, 11 November
Partly cloudy. High 59°, low 44°.
Pressure29.85 inHg
Wind11.9 mph W
Humidity66%
Visibility—
Dew point42°
Thu, 1245° / 32°0
45 °
Harristown, Thursday, 12 November
Clear. High 45°, low 32°.
Pressure29.97 inHg
Wind13.3 mph NW
Humidity53%
Visibility—
Dew point24°
Fri, 1343° / 27°0
43 °
Harristown, Friday, 13 November
Overcast. High 43°, low 27°.
Pressure29.91 inHg
Wind11.5 mph NW
Humidity56%
Visibility—
Dew point23°
Sat, 1446° / 29°0
46 °
Harristown, Saturday, 14 November
Mostly clear. High 46°, low 29°.
Pressure30.00 inHg
Wind16.2 mph NW
Humidity60%
Visibility—
Dew point26°
Sun, 1552° / 32°0
52 °
Harristown, Sunday, 15 November
Clear. High 52°, low 32°.
Pressure30.21 inHg
Wind12.6 mph NW
Humidity63%
Visibility—
Dew point31°
Mon, 1656° / 34°0
56 °
Harristown, Monday, 16 November
Clear. High 56°, low 34°.
Pressure30.30 inHg
Wind7.9 mph W
Humidity54%
Visibility—
Dew point30°
Tue, 1755° / 38°0
55 °
Harristown, Tuesday, 17 November
Overcast. High 55°, low 38°.
Pressure30.15 inHg
Wind7.1 mph W
Humidity52%
Visibility—
Dew point30°
Wed, 1858° / 38°0
58 °
Harristown, Wednesday, 18 November
Clear. High 58°, low 38°.
Pressure30.15 inHg
Wind10.8 mph NW
Humidity62%
Visibility—
Dew point37°
Thu, 1960° / 40°0
60 °
Harristown, Thursday, 19 November
Overcast. High 60°, low 40°.
Pressure30.33 inHg
Wind8.8 mph SW
Humidity62%
Visibility—
Dew point38°
Fri, 2064° / 44°0
64 °
Harristown, Friday, 20 November
Overcast. High 64°, low 44°.
Pressure30.15 inHg
Wind13.1 mph W
Humidity48%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2150° / 36°0.09
50 °
Harristown, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.09 in
Chance of precipitation28%
Record high67° (1991)
Record low22° (1987)
Sun, 2249° / 36°0.12
49 °
Harristown, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.12 in
Chance of precipitation32%
Record high69° (2007)
Record low20° (2018)
Mon, 2349° / 35°0.06
49 °
Harristown, Monday, 23 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.06 in
Chance of precipitation20%
Record high67° (1979)
Record low18° (2018)
Tue, 2449° / 36°0.13
49 °
Harristown, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.13 in
Chance of precipitation30%
Record high67° (2014)
Record low13° (1989)
Wed, 2549° / 35°0.12
49 °
Harristown, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.12 in
Chance of precipitation38%
Record high69° (1979)
Record low19° (1989)
Thu, 2651° / 36°0.15
51 °
Harristown, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.15 in
Chance of precipitation37%
Record high66° (1999)
Record low25° (2005)
Fri, 2749° / 36°0.09
49 °
Harristown, Friday, 27 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation32%
Record high64° (1976)
Record low22° (2014)
Sat, 2850° / 37°0.17
50 °
Harristown, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.17 in
Chance of precipitation32%
Record high66° (1990)
Record low21° (2014)
Sun, 2948° / 35°0.14
48 °
Harristown, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.14 in
Chance of precipitation30%
Record high65° (1990)
Record low23° (2023)
Mon, 3047° / 35°0.11
47 °
Harristown, Monday, 30 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.11 in
Chance of precipitation33%
Record high66° (2001)
Record low19° (1976)
Tue, 0147° / 34°0.11
47 °
Harristown, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.11 in
Chance of precipitation37%
Record high69° (2006)
Record low14° (1967)
Wed, 0246° / 33°0.1
46 °
Harristown, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.1 in
Chance of precipitation25%
Record high62° (2023)
Record low4° (1967)
Thu, 0346° / 33°0.11
46 °
Harristown, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.11 in
Chance of precipitation22%
Record high67° (1998)
Record low15° (1976)
Fri, 0446° / 33°0.1
46 °
Harristown, Friday, 4 December
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.1 in
Chance of precipitation23%
Record high71° (1982)
Record low14° (1966)
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 Harristown, 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 Harristown, 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.