As of 08:17 EDT

Islip, NY weather in December

50°

Islip, Wednesday, 7 October, 08:17

Clear. Feels like 49°. High 65°, low 40°.

Pressure30.06 inHg

Wind3.4 mph N

Humidity76%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

In December, Islip, NY averages a high of 43.3° and a low of 33.8°. About 4.8 inches of precipitation fall over the month (11 wet days). The record high is 67.8° (1998) and the record low 0.5° (1980). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	47.7°	38.3°	37%	63.7° (2001)	24.1° (1964)
2	47.3°	37.6°	33%	57.6° (1982)	22.3° (1971)
3	46.9°	37°	30%	60.8° (2009)	16.7° (1976)
4	45.9°	36.3°	23%	64.9° (1998)	18.1° (1989)
5	44.6°	36.1°	30%	62.2° (2001)	20.3° (2025)
6	45.9°	36.9°	48%	63.3° (2001)	24.8° (2007)
7	44.8°	35.8°	35%	67.8° (1998)	22.8° (1964)
8	43.2°	34.7°	38%	57.2° (1978)	21.4° (2006)
9	45.1°	34.9°	42%	61.7° (1978)	17.4° (1968)
10	45°	36.1°	40%	58.6° (2023)	12.4° (1968)
11	44.4°	35.2°	47%	60.1° (2021)	16.2° (1977)
12	43.9°	34.5°	43%	60.3° (2021)	11.3° (1988)
13	44.1°	34.5°	35%	57.9° (2020)	12° (1960)
14	43.3°	34.3°	38%	59.2° (2015)	14.9° (1982)
15	44.4°	34.5°	35%	60.6° (2015)	17.8° (1962)
16	44.2°	34.5°	42%	59.2° (1971)	19.2° (1961)
17	43.7°	34.2°	38%	58.6° (2000)	12.9° (1972)
18	41.7°	32.4°	25%	59.9° (2023)	19.2° (1989)
19	40.5°	31.1°	27%	57.6° (1990)	17.1° (1991)
20	40.8°	31.6°	35%	57.6° (1999)	14.5° (1963)
21	42.1°	32.4°	32%	58.8° (2018)	9.5° (1963)
22	41.9°	32.5°	35%	61° (2013)	8.6° (1989)
23	42.8°	33.1°	42%	58.3° (2015)	7.5° (1989)
24	42.8°	33.1°	43%	63.5° (2015)	10° (2022)
25	42.3°	30.7°	38%	60.1° (2020)	0.5° (1980)
26	39.6°	30.4°	33%	58.1° (1982)	6.6° (1980)
27	39°	30.4°	37%	58.1° (2015)	8.8° (1989)
28	42.1°	32°	30%	58.6° (2008)	12.9° (1960)
29	42.6°	32.4°	37%	60.8° (1984)	13.6° (2017)
30	40.5°	31.1°	33%	56.1° (1990)	4.1° (1962)
31	40.6°	30.6°	45%	57.7° (1990)	1.4° (1962)