Monthly outlook for Fullerton, PA: average high 61.4°, average low 43.6°. That is 0.6° below the climate normal for October. Precipitation is expected on 5 days (about 2.5 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 14 October (78.6°), the coolest 20 October (29.9°).
61.4°/43.6°
Average high / low
−0.6°
Below normal
5 / 4
Wet days / normal
2.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
64.4°
63.4°
+0.5°
20 October – 29 October
56.4°
60°
-2°
30 October – 8 November
at normal
56.8°
—
October records over 66 years
88.3°2 October 2019All-time high
23.9°31 October 2011All-time low
Climate normals and records are computed from the nearest reference point — Allentown (2 mi).
Sun, 1163° / 51°1.34
63 °
Fullerton, Sunday, 11 October
Rain. High 63°, low 51°.
Pressure30.21 inHg
Wind12.9 mph E
Humidity97%
Visibility3.0 mi
Dew point57°
Mon, 1273° / 50°0.19
73 °
Fullerton, Monday, 12 October
Rain. High 73°, low 50°.
Pressure29.80 inHg
Wind10.6 mph N
Humidity67%
Visibility6.2 mi
Dew point58°
Tue, 1377° / 51°0
77 °
Fullerton, Tuesday, 13 October
Clear. High 77°, low 51°.
Pressure29.91 inHg
Wind7.2 mph SW
Humidity71%
Visibility6.2 mi
Dew point61°
Wed, 1479° / 62°0.06
79 °
Fullerton, Wednesday, 14 October
Light rain. High 79°, low 62°.
Pressure29.88 inHg
Wind9.3 mph NW
Humidity66%
Visibility6.2 mi
Dew point65°
Thu, 1563° / 48°0
63 °
Fullerton, Thursday, 15 October
Overcast. High 63°, low 48°.
Pressure30.21 inHg
Wind10 mph N
Humidity61%
Visibility—
Dew point48°
Fri, 1663° / 49°0.7
63 °
Fullerton, Friday, 16 October
Rain. High 63°, low 49°.
Pressure30.00 inHg
Wind7 mph SW
Humidity88%
Visibility—
Dew point51°
Sat, 1761° / 46°0.24
61 °
Fullerton, Saturday, 17 October
Light rain. High 61°, low 46°.
Pressure29.91 inHg
Wind9.2 mph NW
Humidity82%
Visibility—
Dew point50°
Sun, 1848° / 37°0
48 °
Fullerton, Sunday, 18 October
Partly cloudy. High 48°, low 37°.
Pressure30.06 inHg
Wind16 mph NW
Humidity60%
Visibility—
Dew point33°
Mon, 1948° / 35°0
48 °
Fullerton, Monday, 19 October
Clear. High 48°, low 35°.
Pressure30.53 inHg
Wind15.2 mph N
Humidity36%
Visibility—
Dew point17°
Tue, 2051° / 30°0
51 °
Fullerton, Tuesday, 20 October
Overcast. High 51°, low 30°.
Pressure30.59 inHg
Wind5.1 mph NE
Humidity40%
Visibility—
Dew point20°
Wed, 2155° / 37°0
55 °
Fullerton, Wednesday, 21 October
Mostly clear. High 55°, low 37°.
Pressure30.53 inHg
Wind3.2 mph S
Humidity44%
Visibility—
Dew point27°
Thu, 2257° / 37°0
57 °
Fullerton, Thursday, 22 October
Clear. High 57°, low 37°.
Pressure30.62 inHg
Wind5.2 mph SE
Humidity49%
Visibility—
Dew point31°
Fri, 2358° / 39°0
58 °
Fullerton, Friday, 23 October
Clear. High 58°, low 39°.
Pressure30.45 inHg
Wind5.7 mph E
Humidity63%
Visibility—
Dew point38°
Sat, 2459° / 41°0
59 °
Fullerton, Saturday, 24 October
Overcast. High 59°, low 41°.
Pressure30.33 inHg
Wind5.5 mph NE
Humidity58%
Visibility—
Dew point37°
Sun, 2558° / 41°0
58 °
Fullerton, Sunday, 25 October
Overcast. High 58°, low 41°.
Pressure30.24 inHg
Wind10.7 mph E
Humidity55%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2659° / 44°0.11
59 °
Fullerton, Monday, 26 October
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.11 in
Chance of precipitation35%
Record high78° (1963)
Record low30° (1960)
Tue, 2759° / 43°0.2
59 °
Fullerton, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.2 in
Chance of precipitation30%
Record high80° (1963)
Record low29° (1988)
Wed, 2859° / 42°0.15
59 °
Fullerton, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.15 in
Chance of precipitation27%
Record high77° (1984)
Record low25° (1976)
Thu, 2957° / 41°0.2
57 °
Fullerton, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high57°
Average low41°
Average precipitation0.2 in
Chance of precipitation25%
Record high72° (1971)
Record low29° (1965)
Fri, 3057° / 40°0.1
57 °
Fullerton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high57°
Average low40°
Average precipitation0.1 in
Chance of precipitation23%
Record high76° (2024)
Record low28° (1962)
Sat, 3158° / 41°0.05
58 °
Fullerton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.05 in
Chance of precipitation20%
Record high80° (2024)
Record low24° (2011)
Sun, 0159° / 43°0.07
59 °
Fullerton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.07 in
Chance of precipitation23%
Record high77° (1974)
Record low22° (2002)
Mon, 0259° / 43°0.12
59 °
Fullerton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.12 in
Chance of precipitation32%
Record high76° (1982)
Record low24° (2002)
Tue, 0358° / 42°0.08
58 °
Fullerton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.08 in
Chance of precipitation23%
Record high76° (2003)
Record low24° (2002)
Wed, 0457° / 40°0.07
57 °
Fullerton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high57°
Average low40°
Average precipitation0.07 in
Chance of precipitation18%
Record high73° (1961)
Record low27° (2006)
Thu, 0556° / 40°0.11
56 °
Fullerton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.11 in
Chance of precipitation30%
Record high75° (2022)
Record low26° (1991)
Fri, 0655° / 40°0.08
55 °
Fullerton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.08 in
Chance of precipitation30%
Record high80° (2024)
Record low26° (1967)
Sat, 0755° / 39°0.07
55 °
Fullerton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.07 in
Chance of precipitation27%
Record high71° (1975)
Record low26° (1962)
Sun, 0854° / 38°0.13
54 °
Fullerton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.13 in
Chance of precipitation20%
Record high72° (2020)
Record low25° (1960)
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 Fullerton, 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 Fullerton, 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.