Point Forecast: 2 Miles WNW Chantilly VA  38.89N 77.46W (Elev. 282 ft)	Last Update: 9:53 am EST Dec 13, 2025

[hide menu]

Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Wind Chill (°F) 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-ft) Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility

48-Hour Period Starting: 11am Sat, Dec 13 202512pm Sat, Dec 13 20251pm Sat, Dec 13 20252pm Sat, Dec 13 20253pm Sat, Dec 13 20254pm Sat, Dec 13 20255pm Sat, Dec 13 20256pm Sat, Dec 13 20257pm Sat, Dec 13 20258pm Sat, Dec 13 20259pm Sat, Dec 13 202510pm Sat, Dec 13 202511pm Sat, Dec 13 202512am Sun, Dec 14 20251am Sun, Dec 14 20252am Sun, Dec 14 20253am Sun, Dec 14 20254am Sun, Dec 14 20255am Sun, Dec 14 20256am Sun, Dec 14 20257am Sun, Dec 14 20258am Sun, Dec 14 20259am Sun, Dec 14 202510am Sun, Dec 14 202511am Sun, Dec 14 202512pm Sun, Dec 14 20251pm Sun, Dec 14 20252pm Sun, Dec 14 20253pm Sun, Dec 14 20254pm Sun, Dec 14 20255pm Sun, Dec 14 20256pm Sun, Dec 14 20257pm Sun, Dec 14 20258pm Sun, Dec 14 20259pm Sun, Dec 14 202510pm Sun, Dec 14 202511pm Sun, Dec 14 202512am Mon, Dec 15 20251am Mon, Dec 15 20252am Mon, Dec 15 20253am Mon, Dec 15 20254am Mon, Dec 15 20255am Mon, Dec 15 20256am Mon, Dec 15 20257am Mon, Dec 15 20258am Mon, Dec 15 20259am Mon, Dec 15 202510am Mon, Dec 15 202511am Mon, Dec 15 202512pm Mon, Dec 15 20251pm Mon, Dec 15 20252pm Mon, Dec 15 20253pm Mon, Dec 15 20254pm Mon, Dec 15 20255pm Mon, Dec 15 20256pm Mon, Dec 15 20257pm Mon, Dec 15 20258pm Mon, Dec 15 20259pm Mon, Dec 15 202510pm Mon, Dec 15 202511pm Mon, Dec 15 202512am Tue, Dec 16 20251am Tue, Dec 16 20252am Tue, Dec 16 20253am Tue, Dec 16 20254am Tue, Dec 16 20255am Tue, Dec 16 20256am Tue, Dec 16 20257am Tue, Dec 16 20258am Tue, Dec 16 20259am Tue, Dec 16 202510am Tue, Dec 16 202511am Tue, Dec 16 202512pm Tue, Dec 16 20251pm Tue, Dec 16 20252pm Tue, Dec 16 20253pm Tue, Dec 16 20254pm Tue, Dec 16 20255pm Tue, Dec 16 20256pm Tue, Dec 16 20257pm Tue, Dec 16 20258pm Tue, Dec 16 20259pm Tue, Dec 16 202510pm Tue, Dec 16 202511pm Tue, Dec 16 202512am Wed, Dec 17 20251am Wed, Dec 17 20252am Wed, Dec 17 20253am Wed, Dec 17 20254am Wed, Dec 17 20255am Wed, Dec 17 20256am Wed, Dec 17 20257am Wed, Dec 17 20258am Wed, Dec 17 20259am Wed, Dec 17 202510am Wed, Dec 17 202511am Wed, Dec 17 202512pm Wed, Dec 17 20251pm Wed, Dec 17 20252pm Wed, Dec 17 20253pm Wed, Dec 17 20254pm Wed, Dec 17 20255pm Wed, Dec 17 20256pm Wed, Dec 17 20257pm Wed, Dec 17 20258pm Wed, Dec 17 20259pm Wed, Dec 17 202510pm Wed, Dec 17 2025

Date	12/13													12/14
Hour (EST)	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10
Temperature (°F)	38	41	43	45	44	43	41	40	39	38	36	35	35	34	35	34	33	32	29	28	26	25	27	29
Dewpoint (°F)	29	30	31	31	31	31	31	31	32	32	32	32	32	32	32	31	30	28	25	22	21	19	17	16
Wind Chill (°F)	33	36	39	43	42	40	39	40	39	36	36	35	32	31	31	29	26	24	19	17	14	12	14	17
Surface Wind (mph)	7	7	6	5	3	5	3	2	2	3	2	2	3	3	5	6	8	10	11	13	14	16	17	18
Wind Dir	SW	SW	SW	SW	SW	SW	W	NW	N	N	N	N	N	N	N	N	N	N	NW	NW	NW	NW	NW	NW
Gust																		20	22	22	23	25	28	29
Sky Cover (%)	82	79	91	91	77	74	95	97	99	99	99	100	100	100	100	100	100	100	95	83	54	24	25	25
Precipitation Potential (%)	2	1	3	3	2	3	7	12	13	16	17	26	40	50	73	85	83	55	31	16	2	2	2	1
Relative Humidity (%)	70	65	62	58	60	62	67	70	76	79	85	89	89	92	89	89	89	85	85	78	81	78	65	58
Rain	--	--	--	--	--	--	--	--	--	SChc	SChc	Chc	Chc	Chc	Lkly	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Lkly	Ocnl	Ocnl	Lkly	Chc	SChc	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date														12/15
Hour (EST)	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10
Temperature (°F)	29	29	28	26	25	23	22	21	20	20	20	20	20	20	20	20	20	20	20	19	20	21	24	26
Dewpoint (°F)	14	11	9	7	6	5	4	4	4	5	6	7	8	8	9	9	10	10	10	10	10	11	12	13
Wind Chill (°F)	16	16	15	12	11	8	7	7	6	6	6	6	6	6	7	7	7	7	8	7	9	10	14	15
Surface Wind (mph)	20	20	20	20	20	20	18	16	15	15	16	16	16	15	14	14	13	13	11	10	10	10	10	11
Wind Dir	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW
Gust	30	31	32	34	37	37	34	32	28	28	28	26	26	25	25	24	23	23	22	22	21	21	20	18
Sky Cover (%)	28	31	34	33	31	30	27	25	22	26	31	35	31	28	24	23	23	22	25	29	32	33	34	35
Precipitation Potential (%)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	53	46	44	44	44	45	45	47	49	51	54	56	59	59	62	62	64	64	64	67	64	65	60	57
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph Hazardous Weather Briefing Page Past Weather Information Interactive Forecast Map Home