As of 15:31 EDT

Weather in Islip, NY

74°

Islip, Thursday, 8 October, 15:31

Clear. Feels like 73°. High 74°, low 55°.

Pressure29.85 inHg

Wind12.7 mph NW

Humidity42%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Monthly outlook for Islip, NY: average high 66.1°, average low 53.8°. That is 2.2° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 13 October (76°), the coolest 18 October (44.3°).

66.1°/53.8°

Average high / low

+2.2°

Above normal

4 / 4

Wet days / normal

0.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	67.2°	63.2°	+2.2°
18 October – 27 October	64.4°	59.8°	+2.5°
28 October – 6 November	at normal	57.1°	—

October records over 66 years

82.9°8 October 2007All-time high

33.6°27 October 1976All-time low

Fri, 0972° / 51°

72 °

Islip, Friday, 9 October

Clear. High 72°, low 51°.

Pressure30.12 inHg

Wind7.3 mph W

Humidity46%

Visibility6.2 mi

Dew point46°

Sat, 1067° / 51°

67 °

Islip, Saturday, 10 October

Overcast. High 67°, low 51°.

Pressure30.47 inHg

Wind2.4 mph N

Humidity49%

Visibility6.2 mi

Dew point45°

Sun, 1166° / 55°

0.15

66 °

Islip, Sunday, 11 October

Light rain. High 66°, low 55°.

Pressure30.36 inHg

Wind9.4 mph S

Humidity60%

Visibility6.2 mi

Dew point52°

Mon, 1265° / 60°

0.19

65 °

Islip, Monday, 12 October

Rain. High 65°, low 60°.

Pressure29.74 inHg

Wind8.6 mph N

Humidity91%

Visibility6.2 mi

Dew point61°

Tue, 1376° / 57°

76 °

Islip, Tuesday, 13 October

Light rain. High 76°, low 57°.

Pressure29.74 inHg

Wind9.3 mph N

Humidity76%

Visibility—

Dew point60°

Wed, 1462° / 50°

62 °

Islip, Wednesday, 14 October

Clear. High 62°, low 50°.

Pressure30.00 inHg

Wind12.8 mph N

Humidity44%

Visibility—

Dew point33°

Thu, 1560° / 52°

60 °

Islip, Thursday, 15 October

Mostly clear. High 60°, low 52°.

Pressure30.30 inHg

Wind7.1 mph N

Humidity42%

Visibility—

Dew point35°

Fri, 1665° / 56°

65 °

Islip, Friday, 16 October

Overcast. High 65°, low 56°.

Pressure30.24 inHg

Wind16.4 mph SW

Humidity57%

Visibility—

Dew point48°

Sat, 1765° / 47°

0.01

65 °

Islip, Saturday, 17 October

Light rain. High 65°, low 47°.

Pressure30.12 inHg

Wind18.1 mph NW

Humidity48%

Visibility—

Dew point38°

Sun, 1857° / 44°

57 °

Islip, Sunday, 18 October

Clear. High 57°, low 44°.

Pressure30.53 inHg

Wind13.5 mph N

Humidity34%

Visibility—

Dew point22°

Mon, 1963° / 52°

63 °

Islip, Monday, 19 October

Overcast. High 63°, low 52°.

Pressure30.47 inHg

Wind10.3 mph SW

Humidity34%

Visibility—

Dew point30°

Tue, 2063° / 56°

63 °

Islip, Tuesday, 20 October

Overcast. High 63°, low 56°.

Pressure30.30 inHg

Wind9.2 mph SW

Humidity53%

Visibility—

Dew point43°

Wed, 2165° / 57°

0.19

65 °

Islip, Wednesday, 21 October

Light rain. High 65°, low 57°.

Pressure30.21 inHg

Wind8.9 mph SW

Humidity77%

Visibility—

Dew point53°

Thu, 2269° / 58°

0.02

69 °

Islip, Thursday, 22 October

Light rain. High 69°, low 58°.

Pressure30.15 inHg

Wind8.8 mph W

Humidity74%

Visibility—

Dew point55°

Fri, 2369° / 58°

0.05

69 °

Islip, Friday, 23 October

Light rain. High 69°, low 58°.

Pressure29.97 inHg

Wind14.9 mph S

Humidity81%

Visibility—

Dew point60°

From day 17 onward the outlook is built from 60-year climate statistics

Sat, 2460° / 51°

0.14

60 °

Islip, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high60°

Average low51°

Average precipitation0.14 in

Chance of precipitation33%

Record high71° (2017)

Record low35° (1969)

Sun, 2560° / 51°

0.15

60 °

Islip, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high60°

Average low51°

Average precipitation0.15 in

Chance of precipitation38%

Record high71° (2001)

Record low42° (1962)

Mon, 2659° / 50°

0.16

59 °

Islip, Monday, 26 October

Climate normal for this date — 60-year average.

Average high59°

Average low50°

Average precipitation0.16 in

Chance of precipitation35%

Record high69° (2022)

Record low38° (1962)

Tue, 2759° / 50°

0.16

59 °

Islip, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high59°

Average low50°

Average precipitation0.16 in

Chance of precipitation30%

Record high71° (1963)

Record low34° (1976)

Wed, 2859° / 49°

0.17

59 °

Islip, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high59°

Average low49°

Average precipitation0.17 in

Chance of precipitation28%

Record high75° (2023)

Record low35° (1976)

Thu, 2957° / 48°

0.2

57 °

Islip, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high57°

Average low48°

Average precipitation0.2 in

Chance of precipitation27%

Record high72° (1984)

Record low35° (1965)

Fri, 3056° / 47°

0.11

56 °

Islip, Friday, 30 October

Climate normal for this date — 60-year average.

Average high56°

Average low47°

Average precipitation0.11 in

Chance of precipitation27%

Record high68° (2023)

Record low37° (1966)

Sat, 3157° / 48°

0.05

57 °

Islip, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high57°

Average low48°

Average precipitation0.05 in

Chance of precipitation20%

Record high70° (2024)

Record low36° (2020)

Sun, 0158° / 50°

0.13

58 °

Islip, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high58°

Average low50°

Average precipitation0.13 in

Chance of precipitation28%

Record high75° (2024)

Record low38° (1976)

Mon, 0258° / 49°

0.07

58 °

Islip, Monday, 2 November

Climate normal for this date — 60-year average.

Average high58°

Average low49°

Average precipitation0.07 in

Chance of precipitation30%

Record high69° (1971)

Record low33° (1965)

Tue, 0358° / 48°

0.11

58 °

Islip, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high58°

Average low48°

Average precipitation0.11 in

Chance of precipitation27%

Record high69° (2003)

Record low37° (1996)

Wed, 0457° / 47°

0.06

57 °

Islip, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high57°

Average low47°

Average precipitation0.06 in

Chance of precipitation23%

Record high69° (1975)

Record low37° (2013)

Thu, 0556° / 48°

0.14

56 °

Islip, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high56°

Average low48°

Average precipitation0.14 in

Chance of precipitation32%

Record high68° (2022)

Record low38° (1965)

Fri, 0655° / 47°

0.11

55 °

Islip, Friday, 6 November

Climate normal for this date — 60-year average.

Average high55°

Average low47°

Average precipitation0.11 in

Chance of precipitation35%

Record high69° (2024)

Record low37° (1962)

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, 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, 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.