Monthly outlook for Great Valley, NY: average high 57.8°, average low 41.8°. That is 4.2° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 7 days and 1.9 inches. The warmest day looks like 29 October (65°), the coolest 25 October (32.3°).
57.8°/41.8°
Average high / low
+4.2°
Above normal
3 / 7
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
58.1°
51.3°
+3.8°
2 November – 11 November
57.2°
47.4°
+5.5°
12 November – 21 November
at normal
41.9°
—
October records over 66 years
80.4°1 October 2019All-time high
18.7°20 October 1972All-time low
Climate normals and records are computed from the nearest reference point — Franklinville (10 mi).
Sat, 2459° / 33°0
59 °
Great Valley, Saturday, 24 October
Clear. High 59°, low 33°.
Pressure30.50 inHg
Wind3.6 mph S
Humidity45%
Visibility6.2 mi
Dew point34°
Sun, 2559° / 32°0
59 °
Great Valley, Sunday, 25 October
Clear. High 59°, low 32°.
Pressure30.53 inHg
Wind5.4 mph SW
Humidity43%
Visibility6.2 mi
Dew point33°
Mon, 2661° / 42°0
61 °
Great Valley, Monday, 26 October
Overcast. High 61°, low 42°.
Pressure30.30 inHg
Wind8.3 mph W
Humidity68%
Visibility6.2 mi
Dew point48°
Tue, 2750° / 36°0
50 °
Great Valley, Tuesday, 27 October
Overcast. High 50°, low 36°.
Pressure30.42 inHg
Wind4.4 mph NE
Humidity63%
Visibility6.2 mi
Dew point35°
Wed, 2856° / 34°0
56 °
Great Valley, Wednesday, 28 October
Overcast. High 56°, low 34°.
Pressure30.39 inHg
Wind9.5 mph S
Humidity61%
Visibility—
Dew point33°
Thu, 2965° / 45°0.01
65 °
Great Valley, Thursday, 29 October
Light rain. High 65°, low 45°.
Pressure30.21 inHg
Wind10.8 mph SW
Humidity70%
Visibility—
Dew point47°
Fri, 3061° / 50°0
61 °
Great Valley, Friday, 30 October
Overcast. High 61°, low 50°.
Pressure30.15 inHg
Wind7.1 mph W
Humidity76%
Visibility—
Dew point47°
Sat, 3160° / 44°0
60 °
Great Valley, Saturday, 31 October
Overcast. High 60°, low 44°.
Pressure30.33 inHg
Wind4.7 mph SE
Humidity86%
Visibility—
Dew point46°
Sun, 0154° / 53°0.35
54 °
Great Valley, Sunday, 1 November
Light rain. High 54°, low 53°.
Pressure30.30 inHg
Wind11.6 mph S
Humidity94%
Visibility—
Dew point51°
Mon, 0260° / 52°0.04
60 °
Great Valley, Monday, 2 November
Light rain. High 60°, low 52°.
Pressure30.33 inHg
Wind4.7 mph SW
Humidity93%
Visibility—
Dew point54°
Tue, 0362° / 53°0.13
62 °
Great Valley, Tuesday, 3 November
Light rain. High 62°, low 53°.
Pressure30.18 inHg
Wind15.8 mph S
Humidity94%
Visibility—
Dew point54°
Wed, 0459° / 41°0.67
59 °
Great Valley, Wednesday, 4 November
Rain. High 59°, low 41°.
Pressure29.94 inHg
Wind16.8 mph NW
Humidity94%
Visibility—
Dew point43°
Thu, 0553° / 40°0
53 °
Great Valley, Thursday, 5 November
Mostly clear. High 53°, low 40°.
Pressure30.00 inHg
Wind15.4 mph W
Humidity66%
Visibility—
Dew point35°
Fri, 0657° / 43°0
57 °
Great Valley, Friday, 6 November
Overcast. High 57°, low 43°.
Pressure29.94 inHg
Wind10.9 mph W
Humidity78%
Visibility—
Dew point43°
Sat, 0752° / 36°0
52 °
Great Valley, Saturday, 7 November
Overcast. High 52°, low 36°.
Pressure30.15 inHg
Wind5.8 mph W
Humidity69%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0846° / 33°0.1
46 °
Great Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.1 in
Chance of precipitation38%
Record high67° (2020)
Record low17° (1992)
Mon, 0947° / 33°0.1
47 °
Great Valley, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.1 in
Chance of precipitation40%
Record high69° (2020)
Record low12° (1992)
Tue, 1046° / 33°0.15
46 °
Great Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.15 in
Chance of precipitation52%
Record high69° (2020)
Record low14° (2017)
Wed, 1144° / 33°0.18
44 °
Great Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.18 in
Chance of precipitation48%
Record high64° (2012)
Record low13° (2017)
Thu, 1243° / 30°0.13
43 °
Great Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.13 in
Chance of precipitation50%
Record high62° (1964)
Record low6° (2019)
Fri, 1342° / 29°0.09
42 °
Great Valley, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.09 in
Chance of precipitation45%
Record high59° (1964)
Record low8° (2019)
Sat, 1443° / 31°0.14
43 °
Great Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.14 in
Chance of precipitation43%
Record high62° (1994)
Record low7° (1986)
Sun, 1543° / 30°0.19
43 °
Great Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.19 in
Chance of precipitation57%
Record high60° (1964)
Record low4° (1996)
Mon, 1642° / 29°0.15
42 °
Great Valley, Monday, 16 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.15 in
Chance of precipitation47%
Record high60° (1990)
Record low-1° (1967)
Tue, 1742° / 30°0.15
42 °
Great Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.15 in
Chance of precipitation55%
Record high58° (2021)
Record low20° (1980)
Wed, 1842° / 30°0.08
42 °
Great Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.08 in
Chance of precipitation40%
Record high65° (2016)
Record low6° (2014)
Thu, 1942° / 29°0.11
42 °
Great Valley, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.11 in
Chance of precipitation40%
Record high65° (1985)
Record low3° (2014)
Fri, 2041° / 29°0.13
41 °
Great Valley, Friday, 20 November
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.13 in
Chance of precipitation58%
Record high65° (1991)
Record low10° (1986)
Sat, 2139° / 28°0.11
39 °
Great Valley, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.11 in
Chance of precipitation53%
Record high55° (2003)
Record low10° (2008)
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 Great Valley, NY 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 Great Valley, NY 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.