Point Forecast: Islip, Long Island Mac Arthur Airport NY  40.78N 73.09W (Elev. 49 ft)	Last Update: 1:53 am EDT Jul 9, 2025

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Weather Elements Weather/Precipitation Aviation Weather Temperature (°F) Dewpoint (°F) Heat Index (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog Ceiling Height Visibility

48-Hour Period Starting: 6am Wed, Jul 9 20257am Wed, Jul 9 20258am Wed, Jul 9 20259am Wed, Jul 9 202510am Wed, Jul 9 202511am Wed, Jul 9 202512pm Wed, Jul 9 20251pm Wed, Jul 9 20252pm Wed, Jul 9 20253pm Wed, Jul 9 20254pm Wed, Jul 9 20255pm Wed, Jul 9 20256pm Wed, Jul 9 20257pm Wed, Jul 9 20258pm Wed, Jul 9 20259pm Wed, Jul 9 202510pm Wed, Jul 9 202511pm Wed, Jul 9 202512am Thu, Jul 10 20251am Thu, Jul 10 20252am Thu, Jul 10 20253am Thu, Jul 10 20254am Thu, Jul 10 20255am Thu, Jul 10 20256am Thu, Jul 10 20257am Thu, Jul 10 20258am Thu, Jul 10 20259am Thu, Jul 10 202510am Thu, Jul 10 202511am Thu, Jul 10 202512pm Thu, Jul 10 20251pm Thu, Jul 10 20252pm Thu, Jul 10 20253pm Thu, Jul 10 20254pm Thu, Jul 10 20255pm Thu, Jul 10 20256pm Thu, Jul 10 20257pm Thu, Jul 10 20258pm Thu, Jul 10 20259pm Thu, Jul 10 202510pm Thu, Jul 10 202511pm Thu, Jul 10 202512am Fri, Jul 11 20251am Fri, Jul 11 20252am Fri, Jul 11 20253am Fri, Jul 11 20254am Fri, Jul 11 20255am Fri, Jul 11 20256am Fri, Jul 11 20257am Fri, Jul 11 20258am Fri, Jul 11 20259am Fri, Jul 11 202510am Fri, Jul 11 202511am Fri, Jul 11 202512pm Fri, Jul 11 20251pm Fri, Jul 11 20252pm Fri, Jul 11 20253pm Fri, Jul 11 20254pm Fri, Jul 11 20255pm Fri, Jul 11 20256pm Fri, Jul 11 20257pm Fri, Jul 11 20258pm Fri, Jul 11 20259pm Fri, Jul 11 202510pm Fri, Jul 11 202511pm Fri, Jul 11 202512am Sat, Jul 12 20251am Sat, Jul 12 20252am Sat, Jul 12 20253am Sat, Jul 12 20254am Sat, Jul 12 20255am Sat, Jul 12 20256am Sat, Jul 12 20257am Sat, Jul 12 20258am Sat, Jul 12 20259am Sat, Jul 12 202510am Sat, Jul 12 202511am Sat, Jul 12 202512pm Sat, Jul 12 20251pm Sat, Jul 12 20252pm Sat, Jul 12 20253pm Sat, Jul 12 20254pm Sat, Jul 12 20255pm Sat, Jul 12 20256pm Sat, Jul 12 20257pm Sat, Jul 12 20258pm Sat, Jul 12 20259pm Sat, Jul 12 202510pm Sat, Jul 12 202511pm Sat, Jul 12 202512am Sun, Jul 13 20251am Sun, Jul 13 20252am Sun, Jul 13 20253am Sun, Jul 13 20254am Sun, Jul 13 20255am Sun, Jul 13 20256am Sun, Jul 13 20257am Sun, Jul 13 20258am Sun, Jul 13 20259am Sun, Jul 13 202510am Sun, Jul 13 202511am Sun, Jul 13 202512pm Sun, Jul 13 20251pm Sun, Jul 13 20252pm Sun, Jul 13 20253pm Sun, Jul 13 20254pm Sun, Jul 13 20255pm Sun, Jul 13 2025

Date	07/09																		07/10
Hour (EDT)	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05
Temperature (°F)	73	74	76	79	81	83	84	85	85	85	84	83	81	80	78	77	76	75	74	74	73	72	72	72
Dewpoint (°F)	72	73	74	75	75	75	75	74	73	73	73	73	73	73	73	73	73	73	73	73	73	72	71	71
Heat Index (°F)			76	79	87	90	92	92	92	92	91	89	87	83	78	77	76	75
Surface Wind (mph)	3	3	3	5	5	6	7	7	8	8	8	8	8	7	6	5	5	3	3	3	3	3	3	3
Wind Dir	SW	W	W	W	W	W	SW	SW	SW	SW	SW	SW	SW	S	S	S	SW	SW	SW	S	S	S	S	S
Gust
Sky Cover (%)	73	73	73	67	60	54	53	51	50	47	43	40	46	53	59	66	73	80	84	88	91	92	93	94
Precipitation Potential (%)	10	10	4	4	4	9	9	9	13	13	13	20	20	20	16	16	16	37	37	37	35	35	35	66
Relative Humidity (%)	95	95	94	88	82	77	73	70	68	68	69	72	76	80	85	88	91	94	96	99	100	99	98	97
Rain	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	SChc	SChc	SChc	Chc
Date																			07/11
Hour (EDT)	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05
Temperature (°F)	72	73	74	75	76	77	78	79	79	79	79	79	78	76	75	74	73	72	72	71	71	70	70	70
Dewpoint (°F)	72	72	73	73	72	72	73	73	74	74	73	72	72	72	72	72	71	71	71	71	71	70	70	70
Heat Index (°F)				75	76	77	78	79	79	79	79	79	78	76	75
Surface Wind (mph)	3	3	3	5	5	6	6	7	7	7	7	7	6	6	5	5	3	3	3	2	2	2	2	2
Wind Dir	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SE	SE	E	E
Gust
Sky Cover (%)	92	90	89	89	89	89	86	83	80	78	76	74	80	86	92	92	93	93	93	94	94	94	93	93
Precipitation Potential (%)	66	66	69	69	69	69	69	69	52	52	52	52	52	52	44	44	44	44	44	44	24	24	24	24
Relative Humidity (%)	97	98	97	93	88	85	84	85	85	82	80	79	82	86	90	93	95	97	98	99	100	100	100	100
Rain	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc
Thunder	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc

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