Point Forecast: 3 Miles SSW Ashburn VA  39N 77.49W (Elev. 91 m)	Last Update: 4:30 am EDT Mar 21, 2025

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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 Fri, Mar 21 20255am Fri, Mar 21 20256am Fri, Mar 21 20257am Fri, Mar 21 20258am Fri, Mar 21 20259am Fri, Mar 21 202510am Fri, Mar 21 202511am Fri, Mar 21 202512pm Fri, Mar 21 20251pm Fri, Mar 21 20252pm Fri, Mar 21 20253pm Fri, Mar 21 20254pm Fri, Mar 21 20255pm Fri, Mar 21 20256pm Fri, Mar 21 20257pm Fri, Mar 21 20258pm Fri, Mar 21 20259pm Fri, Mar 21 202510pm Fri, Mar 21 202511pm Fri, Mar 21 202512am Sat, Mar 22 20251am Sat, Mar 22 20252am Sat, Mar 22 20253am Sat, Mar 22 20254am Sat, Mar 22 20255am Sat, Mar 22 20256am Sat, Mar 22 20257am Sat, Mar 22 20258am Sat, Mar 22 20259am Sat, Mar 22 202510am Sat, Mar 22 202511am Sat, Mar 22 202512pm Sat, Mar 22 20251pm Sat, Mar 22 20252pm Sat, Mar 22 20253pm Sat, Mar 22 20254pm Sat, Mar 22 20255pm Sat, Mar 22 20256pm Sat, Mar 22 20257pm Sat, Mar 22 20258pm Sat, Mar 22 20259pm Sat, Mar 22 202510pm Sat, Mar 22 202511pm Sat, Mar 22 202512am Sun, Mar 23 20251am Sun, Mar 23 20252am Sun, Mar 23 20253am Sun, Mar 23 20254am Sun, Mar 23 20255am Sun, Mar 23 20256am Sun, Mar 23 20257am Sun, Mar 23 20258am Sun, Mar 23 20259am Sun, Mar 23 202510am Sun, Mar 23 202511am Sun, Mar 23 202512pm Sun, Mar 23 20251pm Sun, Mar 23 20252pm Sun, Mar 23 20253pm Sun, Mar 23 20254pm Sun, Mar 23 20255pm Sun, Mar 23 20256pm Sun, Mar 23 20257pm Sun, Mar 23 20258pm Sun, Mar 23 20259pm Sun, Mar 23 202510pm Sun, Mar 23 202511pm Sun, Mar 23 202512am Mon, Mar 24 20251am Mon, Mar 24 20252am Mon, Mar 24 20253am Mon, Mar 24 20254am Mon, Mar 24 20255am Mon, Mar 24 20256am Mon, Mar 24 20257am Mon, Mar 24 20258am Mon, Mar 24 20259am Mon, Mar 24 202510am Mon, Mar 24 202511am Mon, Mar 24 202512pm Mon, Mar 24 20251pm Mon, Mar 24 20252pm Mon, Mar 24 20253pm Mon, Mar 24 20254pm Mon, Mar 24 20255pm Mon, Mar 24 20256pm Mon, Mar 24 20257pm Mon, Mar 24 20258pm Mon, Mar 24 20259pm Mon, Mar 24 202510pm Mon, Mar 24 202511pm Mon, Mar 24 202512am Tue, Mar 25 20251am Tue, Mar 25 20252am Tue, Mar 25 20253am Tue, Mar 25 20254am Tue, Mar 25 20255am Tue, Mar 25 20256am Tue, Mar 25 20257am Tue, Mar 25 20258am Tue, Mar 25 20259am Tue, Mar 25 202510am Tue, Mar 25 202511am Tue, Mar 25 202512pm Tue, Mar 25 20251pm Tue, Mar 25 20252pm Tue, Mar 25 20253pm Tue, Mar 25 2025

Date	03/21																				03/22
Hour (EDT)	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)	3	2	2	2	1	3	4	7	8	10	12	13	14	14	13	12	10	8	7	7	6	4	4	3
Dewpoint (°C)	-3	-4	-5	-6	-6	-6	-6	-6	-7	-7	-7	-7	-7	-7	-6	-6	-5	-5	-4	-4	-3	-3	-3	-3
Wind Chill (°C)	-3	-4	-5	-5	-6	-3	-2	2	4	6							9	7	5	6	5	3	2	1
Surface Wind (mph)	23	23	23	23	22	22	22	22	22	21	18	17	17	16	11	9	6	6	5	3	3	5	5	5
Wind Dir	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	W	W	W	W	SW	SW	S	S	S
Gust	36	33	33	33	33	32	30	29	29	30	29	29
Sky Cover (%)	22	14	12	8	7	6	6	6	4	4	4	5	11	16	12	10	7	23	49	60	53	48	55	48
Precipitation Potential (%)	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	62	61	61	59	58	54	48	39	34	29	26	24	22	22	25	27	34	38	45	47	51	57	62	62
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																					03/23
Hour (EDT)	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)	3	2	3	3	4	7	9	11	15	17	18	18	18	17	16	14	12	10	9	8	6	5	4	3
Dewpoint (°C)	-3	-3	-3	-2	-3	-2	-1	-1	0	1	1	1	1	1	1	0	-1	-1	-2	-2	-3	-3	-4	-4
Wind Chill (°C)	0	-1	0	1	2	4	6											8	6	5	3	2	1	0
Surface Wind (mph)	6	6	6	7	8	9	10	11	14	16	18	20	20	20	18	15	13	11	11	10	9	8	7	7
Wind Dir	S	S	S	S	SW	SW	SW	SW	W	W	W	W	W	W	NW	NW	NW	NW	NW	NW	NW	NW	NW	N
Gust											29	30	31	31
Sky Cover (%)	52	60	66	71	74	76	75	74	67	59	57	52	44	39	34	35	33	31	30	28	24	20	9	21
Precipitation Potential (%)	0	0	0	0	6	6	6	6	6	6	11	11	11	11	11	11	0	0	0	0	0	0	0	0
Relative Humidity (%)	64	69	67	67	59	55	49	44	36	32	31	30	32	34	36	38	43	46	47	49	53	55	57	61
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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