Monthly outlook for Grotto, NY: average high 56.3°, average low 41.3°. That is 0° below the climate normal for October. Precipitation is expected on 7 days (about 2.8 inches), against a normal of 7 days and 2.3 inches. The warmest day looks like 13 October (72.6°), the coolest 20 October (27.5°).
56.3°/41.3°
Average high / low
−0°
Below normal
7 / 7
Wet days / normal
2.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
57.2°
57.4°
-0.1°
20 October – 29 October
54.7°
53.8°
+0.5°
30 October – 8 November
at normal
50.5°
—
October records over 66 years
82.4°1 October 2019All-time high
24.8°20 October 1972All-time low
Climate normals and records are computed from the nearest reference point — Groton (3 mi).
Sun, 1158° / 43°0.29
58 °
Grotto, Sunday, 11 October
Rain. High 58°, low 43°.
Pressure30.21 inHg
Wind13.2 mph SE
Humidity73%
Visibility5.8 mi
Dew point49°
Mon, 1263° / 53°0.03
63 °
Grotto, Monday, 12 October
Light rain. High 63°, low 53°.
Pressure29.88 inHg
Wind8.9 mph NW
Humidity82%
Visibility6.2 mi
Dew point55°
Tue, 1373° / 53°0.73
73 °
Grotto, Tuesday, 13 October
Heavy rain. High 73°, low 53°.
Pressure29.80 inHg
Wind9.9 mph S
Humidity92%
Visibility6.2 mi
Dew point63°
Wed, 1462° / 54°0.11
62 °
Grotto, Wednesday, 14 October
Light rain. High 62°, low 54°.
Pressure29.91 inHg
Wind13.1 mph NW
Humidity97%
Visibility—
Dew point57°
Thu, 1552° / 45°0
52 °
Grotto, Thursday, 15 October
Overcast. High 52°, low 45°.
Pressure30.33 inHg
Wind16.5 mph N
Humidity64%
Visibility—
Dew point37°
Fri, 1656° / 47°0.31
56 °
Grotto, Friday, 16 October
Rain. High 56°, low 47°.
Pressure29.91 inHg
Wind19.6 mph S
Humidity95%
Visibility—
Dew point48°
Sat, 1757° / 48°0.81
57 °
Grotto, Saturday, 17 October
Rain. High 57°, low 48°.
Pressure29.91 inHg
Wind9.2 mph SW
Humidity85%
Visibility—
Dew point52°
Sun, 1846° / 37°0.31
46 °
Grotto, Sunday, 18 October
Rain. High 46°, low 37°.
Pressure30.00 inHg
Wind12 mph NW
Humidity94%
Visibility—
Dew point44°
Mon, 1940° / 28°0.04
40 °
Grotto, Monday, 19 October
Snow. High 40°, low 28°.
Pressure30.30 inHg
Wind14.3 mph NW
Humidity80%
Visibility—
Dew point31°
Tue, 2048° / 27°0
48 °
Grotto, Tuesday, 20 October
Mostly clear. High 48°, low 27°.
Pressure30.45 inHg
Wind5.3 mph NW
Humidity48%
Visibility—
Dew point22°
Wed, 2155° / 33°0
55 °
Grotto, Wednesday, 21 October
Clear. High 55°, low 33°.
Pressure30.47 inHg
Wind4.4 mph SE
Humidity49%
Visibility—
Dew point28°
Thu, 2258° / 36°0
58 °
Grotto, Thursday, 22 October
Clear. High 58°, low 36°.
Pressure30.45 inHg
Wind8.1 mph S
Humidity55%
Visibility—
Dew point33°
Fri, 2357° / 37°0
57 °
Grotto, Friday, 23 October
Mostly clear. High 57°, low 37°.
Pressure30.33 inHg
Wind13.1 mph S
Humidity63%
Visibility—
Dew point37°
Sat, 2455° / 41°0
55 °
Grotto, Saturday, 24 October
Overcast. High 55°, low 41°.
Pressure30.21 inHg
Wind10 mph SE
Humidity76%
Visibility—
Dew point42°
Sun, 2555° / 40°0.2
55 °
Grotto, Sunday, 25 October
Rain. High 55°, low 40°.
Pressure29.85 inHg
Wind14.1 mph S
Humidity69%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2653° / 41°0.15
53 °
Grotto, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.15 in
Chance of precipitation42%
Record high75° (1963)
Record low29° (1997)
Tue, 2753° / 40°0.15
53 °
Grotto, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.15 in
Chance of precipitation40%
Record high74° (2023)
Record low26° (1976)
Wed, 2853° / 39°0.14
53 °
Grotto, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.14 in
Chance of precipitation45%
Record high74° (1984)
Record low27° (1976)
Thu, 2951° / 38°0.12
51 °
Grotto, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.12 in
Chance of precipitation42%
Record high68° (1989)
Record low26° (1965)
Fri, 3051° / 38°0.09
51 °
Grotto, Friday, 30 October
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.09 in
Chance of precipitation27%
Record high73° (2024)
Record low29° (1990)
Sat, 3152° / 38°0.1
52 °
Grotto, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.1 in
Chance of precipitation33%
Record high75° (2024)
Record low26° (2008)
Sun, 0153° / 39°0.12
53 °
Grotto, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.12 in
Chance of precipitation40%
Record high69° (1974)
Record low29° (1992)
Mon, 0252° / 39°0.18
52 °
Grotto, 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 °
Grotto, 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 °
Grotto, 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 °
Grotto, 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 °
Grotto, 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 °
Grotto, 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 °
Grotto, 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)
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 Grotto, 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 Grotto, 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.