Point Forecast: Stony Brook NY  40.92N 73.12W (Elev. 112 ft)	Last Update: 3:14 pm EDT Jul 13, 2026

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Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Heat Index (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog Mixing Height  x100ftx100m Trans. Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Atmospheric Dispersion Index Ceiling Height Visibility

48-Hour Period Starting: 8pm Mon, Jul 13 20269pm Mon, Jul 13 202610pm Mon, Jul 13 202611pm Mon, Jul 13 202612am Tue, Jul 14 20261am Tue, Jul 14 20262am Tue, Jul 14 20263am Tue, Jul 14 20264am Tue, Jul 14 20265am Tue, Jul 14 20266am Tue, Jul 14 20267am Tue, Jul 14 20268am Tue, Jul 14 20269am Tue, Jul 14 202610am Tue, Jul 14 202611am Tue, Jul 14 202612pm Tue, Jul 14 20261pm Tue, Jul 14 20262pm Tue, Jul 14 20263pm Tue, Jul 14 20264pm Tue, Jul 14 20265pm Tue, Jul 14 20266pm Tue, Jul 14 20267pm Tue, Jul 14 20268pm Tue, Jul 14 20269pm Tue, Jul 14 202610pm Tue, Jul 14 202611pm Tue, Jul 14 202612am Wed, Jul 15 20261am Wed, Jul 15 20262am Wed, Jul 15 20263am Wed, Jul 15 20264am Wed, Jul 15 20265am Wed, Jul 15 20266am Wed, Jul 15 20267am Wed, Jul 15 20268am Wed, Jul 15 20269am Wed, Jul 15 202610am Wed, Jul 15 202611am Wed, Jul 15 202612pm Wed, Jul 15 20261pm Wed, Jul 15 20262pm Wed, Jul 15 20263pm Wed, Jul 15 20264pm Wed, Jul 15 20265pm Wed, Jul 15 20266pm Wed, Jul 15 20267pm Wed, Jul 15 20268pm Wed, Jul 15 20269pm Wed, Jul 15 202610pm Wed, Jul 15 202611pm Wed, Jul 15 202612am Thu, Jul 16 20261am Thu, Jul 16 20262am Thu, Jul 16 20263am Thu, Jul 16 20264am Thu, Jul 16 20265am Thu, Jul 16 20266am Thu, Jul 16 20267am Thu, Jul 16 20268am Thu, Jul 16 20269am Thu, Jul 16 202610am Thu, Jul 16 202611am Thu, Jul 16 202612pm Thu, Jul 16 20261pm Thu, Jul 16 20262pm Thu, Jul 16 20263pm Thu, Jul 16 20264pm Thu, Jul 16 20265pm Thu, Jul 16 20266pm Thu, Jul 16 20267pm Thu, Jul 16 20268pm Thu, Jul 16 20269pm Thu, Jul 16 202610pm Thu, Jul 16 202611pm Thu, Jul 16 202612am Fri, Jul 17 20261am Fri, Jul 17 20262am Fri, Jul 17 20263am Fri, Jul 17 20264am Fri, Jul 17 20265am Fri, Jul 17 20266am Fri, Jul 17 20267am Fri, Jul 17 20268am Fri, Jul 17 20269am Fri, Jul 17 202610am Fri, Jul 17 202611am Fri, Jul 17 202612pm Fri, Jul 17 20261pm Fri, Jul 17 20262pm Fri, Jul 17 20263pm Fri, Jul 17 20264pm Fri, Jul 17 20265pm Fri, Jul 17 20266pm Fri, Jul 17 20267pm Fri, Jul 17 20268pm Fri, Jul 17 20269pm Fri, Jul 17 202610pm Fri, Jul 17 202611pm Fri, Jul 17 202612am Sat, Jul 18 20261am Sat, Jul 18 20262am Sat, Jul 18 20263am Sat, Jul 18 20264am Sat, Jul 18 20265am Sat, Jul 18 20266am Sat, Jul 18 20267am Sat, Jul 18 2026

Date	07/13				07/14
Hour (EDT)	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
Temperature (°F)	74	73	71	70	71	71	71	70	71	70	70	71	74	77	81	84	87	89	90	90	90	90	89	87
Dewpoint (°F)	62	62	62	62	62	62	62	62	61	60	61	62	64	64	65	66	65	66	66	66	67	67	67	68
Heat Index (°F)														77	83	86	89	92	93	93	93	93	92	91
Surface Wind (mph)	13	13	11	11	11	10	10	10	9	9	9	9	9	10	10	10	11	11	13	14	15	14	14	13
Wind Dir	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	W	W	SW	SW	SW	SW	SW	SW	SW	SW
Gust	25	25	25	25	23	20
Sky Cover (%)	5	10	4	1	3	7	5	3	14	11	15	3	9	7	8	19	3	2	9	19	5	16	16	19
Precipitation Potential (%)	0	0	0	0	0	0	1	1	1	1	1	1	2	2	2	1	1	1	0	0	0	0	0	0
Relative Humidity (%)	66	68	73	76	73	73	73	76	71	71	73	73	71	64	58	55	48	47	45	45	47	47	48	53
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date					07/15
Hour (EDT)	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
Temperature (°F)	84	82	82	81	80	81	79	80	79	78	78	78	80	85	88	90	92	93	94	95	95	95	93	90
Dewpoint (°F)	68	68	68	68	68	68	68	68	68	68	68	69	69	70	70	70	70	70	69	68	67	67	66	66
Heat Index (°F)	87	85	85	84	83	84	79	83	79	78	78	78	83	90	93	96	98	99	99	100	99	99	96	93
Surface Wind (mph)	13	13	14	13	13	13	13	13	11	11	10	10	10	11	11	11	11	11	11	11	11	11	10	10
Wind Dir	SW	SW	SW	SW	SW	SW	SW	SW	W	SW	W	W	W	W	W	W	W	W	W	W	W	W	NW	NW
Gust
Sky Cover (%)	18	26	12	14	1	0	3	3	0	3	0	0	0	0	4	7	11	16	28	28	28	28	30	35
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	16	16	16	16	16	16
Relative Humidity (%)	59	63	63	65	67	65	69	67	69	71	71	74	69	61	55	52	49	47	44	42	40	40	41	45
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc

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