Monthly outlook for Groton, NY: average high 55.9°, average low 38°. That is 1.2° above the climate normal for October. Precipitation is expected on 3 days (about 1.3 inches), against a normal of 7 days and 2.2 inches. The warmest day looks like 30 October (61.9°), the coolest 17 October (30.3°).
55.9°/38°
Average high / low
+1.2°
Above normal
3 / 7
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
54.7°
54.5°
+0.1°
27 October – 5 November
57.8°
51.7°
+3.4°
6 November – 15 November
at normal
46.4°
—
October records over 66 years
82.4°1 October 2019All-time high
24.8°20 October 1972All-time low
Sun, 1858° / 31°0
58 °
Groton, Sunday, 18 October
Clear. High 58°, low 31°.
Pressure30.56 inHg
Wind5.7 mph S
Humidity58%
Visibility6.2 mi
Dew point39°
Mon, 1961° / 34°0
61 °
Groton, Monday, 19 October
Clear. High 61°, low 34°.
Pressure30.42 inHg
Wind3 mph NW
Humidity48%
Visibility6.2 mi
Dew point39°
Tue, 2057° / 43°0
57 °
Groton, Tuesday, 20 October
Mostly clear. High 57°, low 43°.
Pressure30.39 inHg
Wind8.3 mph N
Humidity66%
Visibility6.2 mi
Dew point43°
Wed, 2154° / 34°0
54 °
Groton, Wednesday, 21 October
Clear. High 54°, low 34°.
Pressure30.36 inHg
Wind1.3 mph W
Humidity67%
Visibility3.7 mi
Dew point39°
Thu, 2256° / 40°0.01
56 °
Groton, Thursday, 22 October
Light rain. High 56°, low 40°.
Pressure30.21 inHg
Wind11.8 mph N
Humidity86%
Visibility—
Dew point45°
Fri, 2349° / 34°0
49 °
Groton, Friday, 23 October
Clear. High 49°, low 34°.
Pressure30.50 inHg
Wind9.2 mph N
Humidity64%
Visibility—
Dew point31°
Sat, 2455° / 36°0
55 °
Groton, Saturday, 24 October
Overcast. High 55°, low 36°.
Pressure30.56 inHg
Wind11.7 mph S
Humidity54%
Visibility—
Dew point31°
Sun, 2561° / 38°0
61 °
Groton, Sunday, 25 October
Overcast. High 61°, low 38°.
Pressure30.39 inHg
Wind13.8 mph S
Humidity63%
Visibility—
Dew point38°
Mon, 2647° / 36°0.09
47 °
Groton, Monday, 26 October
Light rain. High 47°, low 36°.
Pressure30.27 inHg
Wind14.9 mph NW
Humidity77%
Visibility—
Dew point41°
Tue, 2756° / 33°0
56 °
Groton, Tuesday, 27 October
Clear. High 56°, low 33°.
Pressure30.33 inHg
Wind10.6 mph NW
Humidity50%
Visibility—
Dew point29°
Wed, 2857° / 37°0
57 °
Groton, Wednesday, 28 October
Partly cloudy. High 57°, low 37°.
Pressure30.33 inHg
Wind7.3 mph SE
Humidity54%
Visibility—
Dew point33°
Thu, 2961° / 41°0
61 °
Groton, Thursday, 29 October
Overcast. High 61°, low 41°.
Pressure30.18 inHg
Wind12.6 mph S
Humidity55%
Visibility—
Dew point38°
Fri, 3062° / 57°0.13
62 °
Groton, Friday, 30 October
Light rain. High 62°, low 57°.
Pressure29.91 inHg
Wind13.1 mph SW
Humidity73%
Visibility—
Dew point53°
Sat, 3156° / 42°0.01
56 °
Groton, Saturday, 31 October
Light rain. High 56°, low 42°.
Pressure30.24 inHg
Wind13.3 mph NW
Humidity71%
Visibility—
Dew point42°
Sun, 0155° / 42°1.01
55 °
Groton, Sunday, 1 November
Heavy rain. High 55°, low 42°.
Pressure30.06 inHg
Wind19.8 mph S
Humidity93%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0252° / 39°0.18
52 °
Groton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.18 in
Chance of precipitation43%
Record high72° (1982)
Record low25° (1965)
Tue, 0352° / 38°0.09
52 °
Groton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.09 in
Chance of precipitation47%
Record high71° (1982)
Record low28° (1988)
Wed, 0450° / 38°0.12
50 °
Groton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.12 in
Chance of precipitation33%
Record high70° (2015)
Record low26° (1991)
Thu, 0550° / 38°0.11
50 °
Groton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation47%
Record high70° (2022)
Record low23° (1991)
Fri, 0649° / 37°0.12
49 °
Groton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.12 in
Chance of precipitation40%
Record high71° (2022)
Record low26° (1962)
Sat, 0748° / 36°0.1
48 °
Groton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low36°
Average precipitation0.1 in
Chance of precipitation47%
Record high68° (1975)
Record low12° (1962)
Sun, 0848° / 35°0.15
48 °
Groton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.15 in
Chance of precipitation40%
Record high67° (2020)
Record low23° (1976)
Mon, 0948° / 35°0.11
48 °
Groton, Monday, 9 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.11 in
Chance of precipitation37%
Record high69° (2020)
Record low19° (2019)
Tue, 1048° / 35°0.15
48 °
Groton, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.15 in
Chance of precipitation52%
Record high69° (2020)
Record low19° (2017)
Wed, 1146° / 35°0.16
46 °
Groton, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.16 in
Chance of precipitation58%
Record high64° (2012)
Record low17° (2017)
Thu, 1245° / 33°0.16
45 °
Groton, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.16 in
Chance of precipitation50%
Record high66° (1964)
Record low17° (2019)
Fri, 1344° / 31°0.09
44 °
Groton, Friday, 13 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.09 in
Chance of precipitation52%
Record high59° (1985)
Record low15° (2019)
Sat, 1444° / 33°0.13
44 °
Groton, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.13 in
Chance of precipitation40%
Record high64° (1994)
Record low15° (1986)
Sun, 1544° / 32°0.16
44 °
Groton, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.16 in
Chance of precipitation53%
Record high62° (1960)
Record low13° (1996)
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 Groton, 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 Groton, 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.