Islip, NY: 2025

31 December 2025: 2025 averaged 54.8°F in Islip, NY, the warmest year since 2024, tied 6th warmest of 62 (with 2021 and 2016).

2025

Mean temperature: 54.8°F; Warmest since 2024; 6th warmest of 62
Precipitation: 36.91 in; Driest since 2016; 8th driest of 62

A normal year in Islip, NY (1991 to 2020): a mean temperature of 53.2°F, between 51.4°F and 54.8°F in eight years of ten and 44.00 in of precipitation, between 38.30 in and 57.22 in in eight years of ten.

The mean temperature of every year in Islip, NY since 1964: 54.8°F in 2025; the highest is 55.5°F, in 2023.

Normal range, 51.4 to 54.8°F

Every year, ranked, as a table

Every year in Islip, NY from 1963 to 2025, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2025	54.8	6	62.8	11	46.7	6	36.91	55	0
2024	55.3	2	63.3	5	47.2	2	48.80	19	0
2023	55.5	1	63.6	1	47.3	1	50.19	17	0
2022	54.4	9	63	8	45.8	14	39.61	42	2
2021	54.8	6	62.9	10	46.8	5	46.40	25	0
2020	55	5	63	8	46.9	4	43.46	32	0
2019	53.5	20	61.6	21	45.4	17	48.73	20	0
2018	53.7	17	61.6	21	45.9	12	64.17	2	0
2017	54.2	14	62.3	15	46.2	8	43.44	33	0
2016	54.8	6	63.3	5	46.2	8	34.99	59	0
2015	53.6	19	62	17	45.3	20	38.60	47	0
2014	52.6	29	60.7	31	44.4	32	57.17	7	0
2013	53.1	23	61.3	25	44.9	23	39.22	44	0
2012	55.3	2	63.5	2	47.1	3	44.73	29	0
2011	54.3	11	62.6	12	46.1	11	52.34	13	0
2010	54.1	15	62.4	13	45.8	14	43.07	34	0
2009	51.9	41	59.6	46	44.2	35	52.70	12	0
2008	53.1	23	61.5	23	44.7	27	52.17	14	0
2007	52.7	28	60.9	28	44.5	29	42.86	35	0
2006	54.1	15	62.2	16	45.9	12	53.43	9	0
2005	52.4	33	60.6	32	44.1	36	41.05	39	0
2004	51.3	53	59.3	51	43.4	50	39.21	45	0
2003	51.4	49	59.1	56	43.7	45	50.99	15	0
2002	53.7	17	62	17	45.3	20	43.86	31	0
2001	53	25	61.7	20	44.4	32	37.01	54	0
2000	51.3	53	59.7	44	43	54	45.55	26	0
1999	54.4	9	63.5	2	45.4	17	47.40	22	0
1998	55.1	4	63.5	2	46.7	6	57.68	5	0
1997	52.3	34	61	26	43.6	47	44.14	30	0
1996	51.4	49	59.2	55	43.5	48	59.20	4	0
1995	53.2	22	61.5	23	44.9	23	39.33	43	0
1994	52.5	31	60.9	28	44	38	38.37	49	0
1993	52.2	38	60.5	35	43.9	40	37.64	52	0
1992	51	56	59.3	51	42.7	55	47.11	24	0
1991	54.3	11	63.1	7	45.6	16	41.01	40	0
1990	54.3	11	62.4	13	46.2	8	63.49	3	0
1989	51.1	55	59.1	56	43.2	53	65.32	1	0
1988	51.4	49	59.3	51	43.4	50	39.80	41	0
1987	52	39	60.2	37	43.8	42	37.12	53	0
1986	51.9	41	60	40	43.8	42	37.78	51	0
1985	52.3	34	60	40	44.5	29	34.41	61	0
1984	52.3	34	59.6	46	45	22	53.43	9	0
1983	52.9	26	60.4	36	45.4	17	57.18	6	0
1982	52.3	34	60.2	37	44.4	32	41.62	36	0
1981	52	39	59.8	42	44.1	36	37.91	50	0
1980	52.9	26	60.9	28	44.9	23	34.61	60	0
1979	51.7	44	58.9	58	44.5	29	54.22	8	0
1978	49.8	59	57.6	61	42.1	59	48.97	18	1
1977	51.6	47	59.3	51	43.9	40	47.32	23	0
1976	51	56	59.8	42	42.2	58	38.53	48	0
1975	52.5	31	61	26	44	38	50.84	16	1
1974	51.9	41	60.6	32	43.3	52	41.45	37	0
1973	53.5	20	62	17	44.9	23	45.34	27	0
1972	51.7	44	59.7	44	43.7	45	53.42	11	0
1971	52.6	29	60.6	32	44.6	28	41.43	38	0
1970	51.5	48	59.4	50	43.5	48	35.89	57	0
1969	51.7	44	59.6	46	43.8	42	45.16	28	0
1968	49.4	62	58.2	60	40.6	62	38.68	46	0
1967	49.7	61	57.4	62	42	60	47.87	21	0
1966	51.4	49	60.2	37	42.5	56	36.04	56	0
1965	49.8	59	58.5	59	41.1	61	25.27	62	0
1964	51	56	59.5	49	42.5	56	35.78	58	0
1963									252

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2023	55.5
2024	55.3
2012	55.3
1998	55.1
2020	55
2025	54.8
2021	54.8
2016	54.8
2022	54.4
1999	54.4

Coldest
Year	Mean, °F
1968	49.4
1967	49.7
1978	49.8
1965	49.8
1992	51
1976	51
1964	51
1989	51.1
2004	51.3
2000	51.3

Wettest
Year	Precipitation, in
1989	65.32
2018	64.17
1990	63.49
1996	59.20
1998	57.68
1983	57.18
2014	57.17
1979	54.22
2006	53.43
1984	53.43

Driest
Year	Precipitation, in
1965	25.27
1985	34.41
1980	34.61
2016	34.99
1964	35.78
1970	35.89
1966	36.04
2025	36.91
2001	37.01
1987	37.12

The hottest, coldest and wettest days

Hottest day: 101°F; 24 June 2025
Coldest night: 7°F; 22 January 2025
Wettest day: 2.93 in; 31 July 2025

Month by month

Month	Mean temperature	Precipitation
January	30.4°F 28th coldest of 62	0.60 in 2nd driest of 62
February	34.3°F 20th warmest of 62	3.72 in 22nd wettest of 62
March	45°F 5th warmest of 62	4.76 in 20th wettest of 62
April	52.8°F 4th warmest of 62	1.98 in 10th driest of 62
May	61.4°F 10th warmest of 62	4.67 in 12th wettest of 62
June	72.2°F Warmest of 62	1.88 in 19th driest of 62
July	78.5°F 2nd warmest of 62	5.64 in 8th wettest of 62
August	72.7°F 24th coldest of 62	0.53 in 4th driest of 62
September	69.8°F 3rd warmest of 62	1.58 in 13th driest of 62
October	58.4°F 8th warmest of 63	5.06 in 17th wettest of 63
November	46.1°F 24th warmest of 63	2.72 in 25th driest of 63
December	34.3°F 20th coldest of 63	3.77 in 27th driest of 63

Hot days and freezes

Islip, NY has had 12 days at 90°F or above in 2025 through 31 December, the most by that date since 2022, tied 9th most of 62 (with 2011 and 1980).
Islip, NY has had 1 day at 100°F or above in 2025 through 31 December, equal to the most on record by that date, in 62 years since 1964; provisional.
Islip, NY has had 93 freezing nights (a low of 32°F or below) in 2025 through 31 December, the most by that date since 2022, tied 43rd most of 62 (with 2021 and 1999).
The first freeze of fall 2025 in Islip, NY came on Friday 7 November 2025, the earliest since 2023, tied 48th earliest of 62 (with 2009 and 1973).
The last freeze of spring 2025 in Islip, NY came on Wednesday 9 April 2025, the latest since 2020, tied 41st latest of 62 (with 1996).

Daily records set

Date	Record	Value	Before	Check
19 December	Warmest day	59°F	55°F 2017	Provisional
28 September	Warmest day	84°F	80°F 2015	Provisional
30 July	Warmest day	96°F	95°F 1988	Provisional
25 June	Warmest day	98°F	92°F 2003	Provisional
24 June	Warmest day	101°F	96°F 1966	Provisional
23 June	Warmest day	93°F	91°F 1999	Provisional
29 March	Warmest day	82°F	81°F 1998	Provisional
6 March	Warmest day	60°F	59°F 2004	Provisional
26 February	Warmest day	58°F	57°F 1996	Provisional

Daily records set and not listed: 0

Every month, season and year

Months

Seasons

Years

2025
2026

Islip, NY the day's answers

All-time records

Every answer in words

2025 brought 36.91 in of precipitation in Islip, NY, the driest year since 2016, 8th driest of 62.
The hottest day of 2025 in Islip, NY: 101°F on Tuesday 24 June 2025.
The coldest night of 2025 in Islip, NY: a low of 7°F on Wednesday 22 January 2025.
The wettest day of 2025 in Islip, NY: 2.93 in on Thursday 31 July 2025.