Islip, NY: May

31 May 2026: May 2026 averaged 60.1°F in Islip, NY, the warmest May since 2025, tied 22nd warmest of 63 (with 2004).

May 2026

Mean temperature: 60.1°F; Warmest since 2025; 22nd warmest of 63
Precipitation: 2.68 in; Driest since 2023; 21st driest of 63

A normal May in Islip, NY (1991 to 2020): a mean temperature of 59.5°F, between 56.9°F and 62.6°F in eight years of ten and 3.28 in of precipitation, between 1.48 in and 4.73 in in eight years of ten.

The mean temperature of every May in Islip, NY since 1964: 60.1°F in 2026; the highest is 64.1°F, in 1991.

Normal range, 56.9 to 62.6°F

Every year, ranked, as a table

Every May in Islip, NY from 1964 to 2026, 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
2026	60.1	22	68.8	25	51.5	18	2.68	43	0
2025	61.4	10	69.1	24	53.7	6	4.67	12	0
2024	61.3	12	68.8	25	53.8	4	4.67	12	0
2023	59.2	33	69.4	20	48.9	45	1.91	52	0
2022	61.7	8	70.3	13	53.2	10	4.24	17	0
2021	59.7	27	69.2	21	50.2	35	5.12	9	0
2020	57.7	47	67.1	42	48.3	53	1.22	59	0
2019	59.8	26	67.6	35	51.9	15	5.05	10	0
2018	62.6	5	71.5	5	53.7	6	3.70	23	0
2017	58.7	39	66.9	44	50.5	27	4.16	19	0
2016	58.9	36	67.4	37	50.4	31	3.61	26	0
2015	62.7	3	72	4	53.5	9	0.42	63	0
2014	61.6	9	70.3	13	52.9	11	2.66	44	0
2013	59.1	34	68.7	29	49.5	39	3.05	35	0
2012	62.7	3	70.1	16	55.2	1	4.22	18	0
2011	62.1	7	70.3	13	53.9	3	3.81	22	0
2010	62.3	6	72.5	3	52	13	2.85	38	0
2009	59	35	66.7	48	51.3	20	5.88	7	0
2008	57	53	66.4	50	47.6	58	3.68	25	0
2007	60.6	17	70.9	7	50.4	31	1.57	54	0
2006	59.4	31	67.8	32	50.9	25	4.42	15	0
2005	54.8	61	63.4	61	46.2	61	1.49	56	0
2004	60.1	22	69.2	21	51.1	22	2.69	42	0
2003	55.7	58	63.6	60	47.8	56	4.69	11	0
2002	57.6	48	66.5	49	48.6	49	3.28	33	0
2001	59.9	25	69.5	19	50.4	31	3.27	34	0
2000	59.6	28	68.8	25	50.5	27	2.95	36	0
1999	60.6	17	70.7	9	50.5	27	2.61	45	0
1998	61.3	12	70.5	11	52	13	7.87	4	0
1997	55.7	58	64.9	55	46.5	60	2.72	41	0
1996	57.8	46	66.9	44	48.8	47	3.36	31	0
1995	58.4	41	67.2	39	49.6	38	2.28	48	0
1994	57.9	45	67.2	39	48.6	49	3.61	26	0
1993	60.8	15	70.7	9	50.9	25	1.38	57	0
1992	57.2	51	67.7	34	46.6	59	3.60	28	0
1991	64.1	1	74.6	1	53.6	8	2.33	46	0
1990	56.9	54	65.1	53	48.8	47	8.94	3	0
1989	58.6	40	66.8	47	50.4	31	10.14	1	0
1988	58.8	38	67	43	50.5	27	2.92	37	0
1987	58	42	67.8	32	48.2	54	1.53	55	0
1986	61.4	10	70.5	11	52.3	12	0.73	60	0
1985	60.4	20	69.2	21	51.7	16	4.13	21	0
1984	57.2	51	64.6	56	49.7	36	9.43	2	0
1983	55.7	58	62.9	62	48.5	51	3.70	23	0
1982	60	24	68.3	30	51.6	17	2.09	49	0
1981	59.6	28	68.1	31	51.1	22	1.37	58	0
1980	60.7	16	70.1	16	51.4	19	1.99	51	0
1979	60.5	19	67.2	39	53.8	4	4.15	20	0
1978	56.5	55	63.7	58	49.2	40	6.87	5	0
1977	61	14	70.8	8	51.3	20	2.74	40	0
1976	57.5	50	66.1	51	48.9	45	2.09	49	0
1975	63.5	2	72.7	2	54.3	2	3.56	29	1
1974	57.6	48	66.1	51	49.2	40	2.30	47	0
1973	56	57	63.8	57	48.2	54	4.28	16	0
1972	58	42	67.4	37	48.5	51	5.82	8	0
1971	58	42	66.9	44	49	44	2.84	39	0
1970	59.3	32	67.6	35	51	24	3.36	31	0
1969	58.9	36	68.8	25	49.1	43	1.62	53	0
1968	54.7	62	63.7	58	45.6	62	3.41	30	0
1967	52.7	63	60.3	63	45.1	63	4.52	14	0
1966	56.3	56	65	54	47.7	57	6.09	6	0
1965	59.6	28	69.9	18	49.2	40	0.69	61	0
1964	60.4	20	71	6	49.7	36	0.60	62	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1991	64.1
1975	63.5
2015	62.7
2012	62.7
2018	62.6
2010	62.3
2011	62.1
2022	61.7
2014	61.6
2025	61.4
More years share the last value

Coldest
Year	Mean, °F
1967	52.7
1968	54.7
2005	54.8
2003	55.7
1997	55.7
1983	55.7
1973	56
1966	56.3
1978	56.5
1990	56.9

Wettest
Year	Precipitation, in
1989	10.14
1984	9.43
1990	8.94
1998	7.87
1978	6.87
1966	6.09
2009	5.88
1972	5.82
2021	5.12
2019	5.05

Driest
Year	Precipitation, in
2015	0.42
1964	0.60
1965	0.69
1986	0.73
2020	1.22
1981	1.37
1993	1.38
2005	1.49
1987	1.53
2007	1.57

The hottest, coldest and wettest days

Hottest day: 93°F; 20 May 2026
Coldest night: 40°F; 1 May 2026
Wettest day: 1.01 in; 24 May 2026

Every month, season and year

Months

Seasons

Years

Islip, NY the day's answers

All-time records

Every answer in words

May 2026 brought 2.68 in of precipitation in Islip, NY, the driest May since 2023, 21st driest of 63.
The hottest day of May 2026 in Islip, NY: 93°F on Wednesday 20 May 2026.
The coldest night of May 2026 in Islip, NY: a low of 40°F on Friday 1 May 2026.
The wettest day of May 2026 in Islip, NY: 1.01 in on Sunday 24 May 2026.