Point Forecast: Reston VA  38.97N 77.36W (Elev. 131 m)	Last Update: 3:54 am EST Jan 19, 2026

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Weather Elements Fire Weather Aviation Weather Temperature (°C) Dewpoint (°C) Wind Chill (°C) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Snow Freezing Rain Sleet Fog Mixing Height  x100ftx100m Trans. Wind  ktmphkm/hm/s Vent Rate (x1000 mph-m) Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility

48-Hour Period Starting: 4am Mon, Jan 19 20265am Mon, Jan 19 20266am Mon, Jan 19 20267am Mon, Jan 19 20268am Mon, Jan 19 20269am Mon, Jan 19 202610am Mon, Jan 19 202611am Mon, Jan 19 202612pm Mon, Jan 19 20261pm Mon, Jan 19 20262pm Mon, Jan 19 20263pm Mon, Jan 19 20264pm Mon, Jan 19 20265pm Mon, Jan 19 20266pm Mon, Jan 19 20267pm Mon, Jan 19 20268pm Mon, Jan 19 20269pm Mon, Jan 19 202610pm Mon, Jan 19 202611pm Mon, Jan 19 202612am Tue, Jan 20 20261am Tue, Jan 20 20262am Tue, Jan 20 20263am Tue, Jan 20 20264am Tue, Jan 20 20265am Tue, Jan 20 20266am Tue, Jan 20 20267am Tue, Jan 20 20268am Tue, Jan 20 20269am Tue, Jan 20 202610am Tue, Jan 20 202611am Tue, Jan 20 202612pm Tue, Jan 20 20261pm Tue, Jan 20 20262pm Tue, Jan 20 20263pm Tue, Jan 20 20264pm Tue, Jan 20 20265pm Tue, Jan 20 20266pm Tue, Jan 20 20267pm Tue, Jan 20 20268pm Tue, Jan 20 20269pm Tue, Jan 20 202610pm Tue, Jan 20 202611pm Tue, Jan 20 202612am Wed, Jan 21 20261am Wed, Jan 21 20262am Wed, Jan 21 20263am Wed, Jan 21 20264am Wed, Jan 21 20265am Wed, Jan 21 20266am Wed, Jan 21 20267am Wed, Jan 21 20268am Wed, Jan 21 20269am Wed, Jan 21 202610am Wed, Jan 21 202611am Wed, Jan 21 202612pm Wed, Jan 21 20261pm Wed, Jan 21 20262pm Wed, Jan 21 20263pm Wed, Jan 21 20264pm Wed, Jan 21 20265pm Wed, Jan 21 20266pm Wed, Jan 21 20267pm Wed, Jan 21 20268pm Wed, Jan 21 20269pm Wed, Jan 21 202610pm Wed, Jan 21 202611pm Wed, Jan 21 202612am Thu, Jan 22 20261am Thu, Jan 22 20262am Thu, Jan 22 20263am Thu, Jan 22 20264am Thu, Jan 22 20265am Thu, Jan 22 20266am Thu, Jan 22 20267am Thu, Jan 22 20268am Thu, Jan 22 20269am Thu, Jan 22 202610am Thu, Jan 22 202611am Thu, Jan 22 202612pm Thu, Jan 22 20261pm Thu, Jan 22 20262pm Thu, Jan 22 20263pm Thu, Jan 22 20264pm Thu, Jan 22 20265pm Thu, Jan 22 20266pm Thu, Jan 22 20267pm Thu, Jan 22 20268pm Thu, Jan 22 20269pm Thu, Jan 22 202610pm Thu, Jan 22 202611pm Thu, Jan 22 202612am Fri, Jan 23 20261am Fri, Jan 23 20262am Fri, Jan 23 20263am Fri, Jan 23 20264am Fri, Jan 23 20265am Fri, Jan 23 20266am Fri, Jan 23 20267am Fri, Jan 23 20268am Fri, Jan 23 20269am Fri, Jan 23 202610am Fri, Jan 23 202611am Fri, Jan 23 202612pm Fri, Jan 23 20261pm Fri, Jan 23 20262pm Fri, Jan 23 20263pm Fri, Jan 23 2026

Date	01/19																				01/20
Hour (EST)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°C)	-5	-5	-5	-5	-4	-2	-1	1	2	3	3	4	3	2	0	-2	-3	-3	-4	-6	-7	-7	-8	-8
Dewpoint (°C)	-12	-10	-10	-9	-9	-8	-9	-9	-10	-10	-11	-11	-12	-12	-12	-13	-13	-14	-14	-16	-16	-17	-17	-18
Wind Chill (°C)	-5	-8	-8	-9	-8	-7	-6	-4	-2	-2	-1	0	-1	-3	-6	-8	-9	-10	-11	-13	-14	-14	-15	-16
Surface Wind (mph)	2	3	5	6	7	8	9	11	11	13	13	14	14	14	14	14	14	14	14	14	14	13	11	11
Wind Dir	SW	SW	S	S	S	SW	SW	SW	SW	W	W	W	W	W	W	NW	NW	NW	NW	NW	NW	NW	NW	NW
Gust
Sky Cover (%)	53	29	34	36	34	37	38	41	36	31	24	19	17	13	10	10	14	20	24	23	15	13	10	8
Precipitation Potential (%)	0	0	0	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	57	68	68	71	68	63	55	47	40	38	35	31	32	35	39	42	44	44	45	47	47	47	46	46
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																					01/21
Hour (EST)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°C)	-9	-9	-10	-10	-10	-8	-6	-5	-4	-4	-3	-3	-3	-3	-5	-6	-6	-7	-7	-7	-8	-8	-9	-9
Dewpoint (°C)	-18	-18	-18	-19	-19	-19	-19	-20	-20	-21	-21	-21	-20	-20	-19	-19	-18	-18	-17	-17	-18	-18	-18	-18
Wind Chill (°C)	-16	-16	-17	-16	-17	-15	-12	-11	-10	-10	-8	-8	-8	-8	-9	-11	-9	-9	-7	-7	-8	-8	-9	-9
Surface Wind (mph)	10	9	9	8	9	10	10	10	11	11	11	11	10	8	6	6	5	3	2	1	1	1	1	1
Wind Dir	W	W	W	W	W	W	W	W	W	W	W	W	W	NW	NW	NW	NW	NW	NW	W	SW	S	S	S
Gust
Sky Cover (%)	9	10	12	14	15	14	13	11	9	6	5	5	6	6	6	6	6	7	7	7	7	7	7	8
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 (%)	48	48	50	48	48	40	34	30	27	26	24	24	25	26	31	35	37	41	43	44	44	46	48	48
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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