Monthly outlook for Islip Terrace, NY: average high 53.2°, average low 45°. That is 0.8° above the climate normal for November. Precipitation is expected on 4 days (about 2.1 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 23 November (61.4°), the coolest 18 November (39.8°).
53.2°/45°
Average high / low
+0.8°
Above normal
4 / 5
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 November – 17 November
53.1°
52.8°
+0.1°
18 November – 27 November
53.5°
49.9°
+2°
28 November – 7 December
at normal
47°
—
November records over 66 years
75.2°1 November 2024All-time high
19.8°23 November 2018All-time low
Climate normals and records are computed from the nearest reference point — Islip (1 mi).
Mon, 0956° / 47°0
56 °
Islip Terrace, Monday, 9 November
Partly cloudy. High 56°, low 47°.
Pressure29.77 inHg
Wind13.8 mph NW
Humidity61%
Visibility6.2 mi
Dew point42°
Tue, 1056° / 44°0
56 °
Islip Terrace, Tuesday, 10 November
Mostly clear. High 56°, low 44°.
Pressure29.91 inHg
Wind8.1 mph SW
Humidity62%
Visibility6.2 mi
Dew point42°
Wed, 1156° / 45°0
56 °
Islip Terrace, Wednesday, 11 November
Partly cloudy. High 56°, low 45°.
Pressure29.94 inHg
Wind2.9 mph NW
Humidity61%
Visibility6.2 mi
Dew point42°
Thu, 1258° / 47°0.37
58 °
Islip Terrace, Thursday, 12 November
Rain. High 58°, low 47°.
Pressure29.56 inHg
Wind11.9 mph E
Humidity76%
Visibility6.2 mi
Dew point50°
Fri, 1351° / 41°0.56
51 °
Islip Terrace, Friday, 13 November
Rain. High 51°, low 41°.
Pressure29.29 inHg
Wind12.1 mph NW
Humidity94%
Visibility—
Dew point44°
Sat, 1445° / 40°0.11
45 °
Islip Terrace, Saturday, 14 November
Light rain. High 45°, low 40°.
Pressure29.32 inHg
Wind15.3 mph W
Humidity91%
Visibility—
Dew point38°
Sun, 1548° / 44°0
48 °
Islip Terrace, Sunday, 15 November
Overcast. High 48°, low 44°.
Pressure29.62 inHg
Wind16.4 mph W
Humidity56%
Visibility—
Dew point31°
Mon, 1651° / 46°0
51 °
Islip Terrace, Monday, 16 November
Overcast. High 51°, low 46°.
Pressure29.74 inHg
Wind17 mph NW
Humidity57%
Visibility—
Dew point33°
Tue, 1749° / 42°0
49 °
Islip Terrace, Tuesday, 17 November
Clear. High 49°, low 42°.
Pressure29.97 inHg
Wind14.3 mph NW
Humidity53%
Visibility—
Dew point29°
Wed, 1847° / 40°0
47 °
Islip Terrace, Wednesday, 18 November
Clear. High 47°, low 40°.
Pressure30.09 inHg
Wind12.3 mph N
Humidity58%
Visibility—
Dew point29°
Thu, 1948° / 40°0
48 °
Islip Terrace, Thursday, 19 November
Clear. High 48°, low 40°.
Pressure30.30 inHg
Wind7.3 mph N
Humidity60%
Visibility—
Dew point31°
Fri, 2050° / 41°0
50 °
Islip Terrace, Friday, 20 November
Partly cloudy. High 50°, low 41°.
Pressure30.45 inHg
Wind5.1 mph SW
Humidity66%
Visibility—
Dew point35°
Sat, 2154° / 49°0.01
54 °
Islip Terrace, Saturday, 21 November
Light rain. High 54°, low 49°.
Pressure30.45 inHg
Wind4.9 mph SW
Humidity78%
Visibility—
Dew point45°
Sun, 2260° / 51°0.01
60 °
Islip Terrace, Sunday, 22 November
Light rain. High 60°, low 51°.
Pressure30.27 inHg
Wind15.2 mph S
Humidity87%
Visibility—
Dew point52°
Mon, 2361° / 57°1.01
61 °
Islip Terrace, Monday, 23 November
Rain. High 61°, low 57°.
Pressure29.62 inHg
Wind20.1 mph S
Humidity96%
Visibility—
Dew point60°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2449° / 40°0.09
49 °
Islip Terrace, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.09 in
Chance of precipitation28%
Record high62° (1979)
Record low26° (2013)
Wed, 2549° / 40°0.14
49 °
Islip Terrace, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.14 in
Chance of precipitation33%
Record high63° (1979)
Record low25° (2005)
Thu, 2651° / 41°0.21
51 °
Islip Terrace, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.21 in
Chance of precipitation43%
Record high63° (1979)
Record low29° (1978)
Fri, 2750° / 41°0.13
50 °
Islip Terrace, Friday, 27 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.13 in
Chance of precipitation35%
Record high61° (1986)
Record low29° (1978)
Sat, 2851° / 41°0.16
51 °
Islip Terrace, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.16 in
Chance of precipitation40%
Record high62° (1990)
Record low26° (2002)
Sun, 2949° / 40°0.1
49 °
Islip Terrace, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.1 in
Chance of precipitation30%
Record high62° (2011)
Record low26° (2023)
Mon, 3047° / 38°0.14
47 °
Islip Terrace, Monday, 30 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.14 in
Chance of precipitation35%
Record high63° (2020)
Record low26° (1976)
Tue, 0148° / 38°0.14
48 °
Islip Terrace, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.14 in
Chance of precipitation37%
Record high64° (2001)
Record low24° (1964)
Wed, 0247° / 38°0.14
47 °
Islip Terrace, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.14 in
Chance of precipitation33%
Record high58° (1982)
Record low22° (1971)
Thu, 0347° / 37°0.15
47 °
Islip Terrace, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.15 in
Chance of precipitation30%
Record high61° (2009)
Record low17° (1976)
Fri, 0446° / 36°0.11
46 °
Islip Terrace, Friday, 4 December
Climate normal for this date — 60-year average.
Average high46°
Average low36°
Average precipitation0.11 in
Chance of precipitation23%
Record high65° (1998)
Record low18° (1989)
Sat, 0545° / 36°0.18
45 °
Islip Terrace, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.18 in
Chance of precipitation30%
Record high62° (2001)
Record low20° (2025)
Sun, 0646° / 37°0.19
46 °
Islip Terrace, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.19 in
Chance of precipitation48%
Record high63° (2001)
Record low25° (2007)
Mon, 0745° / 36°0.16
45 °
Islip Terrace, Monday, 7 December
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.16 in
Chance of precipitation35%
Record high68° (1998)
Record low23° (1964)
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 Islip Terrace, 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 Islip Terrace, 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.