Point Forecast: Mc Lean VA  38.95N 77.19W (Elev. 253 ft)	Last Update: 7:53 pm EDT Jul 14, 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 Low Visibility Occurrence Risk Index Ceiling Height Visibility

48-Hour Period Starting: 10pm 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 20268am Sat, Jul 18 20269am Sat, Jul 18 202610am Sat, Jul 18 202611am Sat, Jul 18 202612pm Sat, Jul 18 20261pm Sat, Jul 18 20262pm Sat, Jul 18 20263pm Sat, Jul 18 20264pm Sat, Jul 18 20265pm Sat, Jul 18 20266pm Sat, Jul 18 20267pm Sat, Jul 18 20268pm Sat, Jul 18 20269pm Sat, Jul 18 202610pm Sat, Jul 18 202611pm Sat, Jul 18 202612am Sun, Jul 19 20261am Sun, Jul 19 20262am Sun, Jul 19 20263am Sun, Jul 19 20264am Sun, Jul 19 20265am Sun, Jul 19 20266am Sun, Jul 19 20267am Sun, Jul 19 20268am Sun, Jul 19 20269am Sun, Jul 19 2026

Date	07/14		07/15
Hour (EDT)	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Temperature (°F)	84	82	81	80	78	77	75	74	75	77	80	84	88	91	94	96	98	100	101	101	101	98	95	92
Dewpoint (°F)	65	65	65	64	64	64	64	64	65	65	67	68	68	68	68	67	66	66	65	64	65	66	67	68
Heat Index (°F)	86	84	83	82	78	77	75		75	77	82	87	92	95	99	100	102	104	105	104	105	102	99	96
Surface Wind (mph)	6	6	6	7	7	6	6	5	5	6	6	8	9	9	9	9	9	9	10	10	10	9	8	7
Wind Dir	SW	SW	SW	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W
Gust
Sky Cover (%)	4	4	3	2	10	5	6	11	12	13	32	45	11	25	16	19	12	14	21	20	21	27	24	24
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	53	56	58	58	62	64	69	71	71	67	65	59	52	47	43	39	35	33	31	30	31	35	40	46
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date			07/16
Hour (EDT)	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Temperature (°F)	88	86	84	83	82	81	79	78	79	81	84	87	90	94	96	99	100	102	102	102	102	98	95	92
Dewpoint (°F)	68	68	68	68	68	68	69	69	69	68	67	70	70	70	70	70	69	68	67	66	66	66	66	66
Heat Index (°F)	92	89	87	86	85	84	79	78	79	84	87	92	96	100	103	107	107	109	108	107	107	102	98	95
Surface Wind (mph)	6	5	5	5	5	5	5	5	5	3	3	3	3	5	6	7	8	9	9	9	8	8	8	6
Wind Dir	W	W	W	W	NW	NW	NW	NW	N	N	N	N	W	SW	SW	W	W	W	W	W	W	W	W	W
Gust
Sky Cover (%)	23	21	25	22	28	27	25	25	27	28	26	8	17	26	26	26	26	26	26	26	26	25	25	24
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	15	15	15	15	15	15	6	6
Relative Humidity (%)	52	55	59	61	63	65	72	74	72	65	57	57	52	46	43	39	37	34	32	31	31	35	39	43
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--	--

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