Point Forecast: Herndon VA  38.97N 77.38W (Elev. 354 ft)	Last Update: 10:31 pm EDT Jun 2, 2024

[hide menu]

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 Haines Index Lightning Activity Level 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: 1am Mon, Jun 3 20242am Mon, Jun 3 20243am Mon, Jun 3 20244am Mon, Jun 3 20245am Mon, Jun 3 20246am Mon, Jun 3 20247am Mon, Jun 3 20248am Mon, Jun 3 20249am Mon, Jun 3 202410am Mon, Jun 3 202411am Mon, Jun 3 202412pm Mon, Jun 3 20241pm Mon, Jun 3 20242pm Mon, Jun 3 20243pm Mon, Jun 3 20244pm Mon, Jun 3 20245pm Mon, Jun 3 20246pm Mon, Jun 3 20247pm Mon, Jun 3 20248pm Mon, Jun 3 20249pm Mon, Jun 3 202410pm Mon, Jun 3 202411pm Mon, Jun 3 202412am Tue, Jun 4 20241am Tue, Jun 4 20242am Tue, Jun 4 20243am Tue, Jun 4 20244am Tue, Jun 4 20245am Tue, Jun 4 20246am Tue, Jun 4 20247am Tue, Jun 4 20248am Tue, Jun 4 20249am Tue, Jun 4 202410am Tue, Jun 4 202411am Tue, Jun 4 202412pm Tue, Jun 4 20241pm Tue, Jun 4 20242pm Tue, Jun 4 20243pm Tue, Jun 4 20244pm Tue, Jun 4 20245pm Tue, Jun 4 20246pm Tue, Jun 4 20247pm Tue, Jun 4 20248pm Tue, Jun 4 20249pm Tue, Jun 4 202410pm Tue, Jun 4 202411pm Tue, Jun 4 202412am Wed, Jun 5 20241am Wed, Jun 5 20242am Wed, Jun 5 20243am Wed, Jun 5 20244am Wed, Jun 5 20245am Wed, Jun 5 20246am Wed, Jun 5 20247am Wed, Jun 5 20248am Wed, Jun 5 20249am Wed, Jun 5 202410am Wed, Jun 5 202411am Wed, Jun 5 202412pm Wed, Jun 5 20241pm Wed, Jun 5 20242pm Wed, Jun 5 20243pm Wed, Jun 5 20244pm Wed, Jun 5 20245pm Wed, Jun 5 20246pm Wed, Jun 5 20247pm Wed, Jun 5 20248pm Wed, Jun 5 20249pm Wed, Jun 5 202410pm Wed, Jun 5 202411pm Wed, Jun 5 202412am Thu, Jun 6 20241am Thu, Jun 6 20242am Thu, Jun 6 20243am Thu, Jun 6 20244am Thu, Jun 6 20245am Thu, Jun 6 20246am Thu, Jun 6 20247am Thu, Jun 6 20248am Thu, Jun 6 20249am Thu, Jun 6 202410am Thu, Jun 6 202411am Thu, Jun 6 202412pm Thu, Jun 6 20241pm Thu, Jun 6 20242pm Thu, Jun 6 20243pm Thu, Jun 6 20244pm Thu, Jun 6 20245pm Thu, Jun 6 20246pm Thu, Jun 6 20247pm Thu, Jun 6 20248pm Thu, Jun 6 20249pm Thu, Jun 6 202410pm Thu, Jun 6 202411pm Thu, Jun 6 202412am Fri, Jun 7 20241am Fri, Jun 7 20242am Fri, Jun 7 20243am Fri, Jun 7 20244am Fri, Jun 7 20245am Fri, Jun 7 20246am Fri, Jun 7 20247am Fri, Jun 7 20248am Fri, Jun 7 20249am Fri, Jun 7 202410am Fri, Jun 7 202411am Fri, Jun 7 202412pm Fri, Jun 7 2024

Date	06/03																							06/04
Hour (EDT)	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
Temperature (°F)	68	67	66	66	65	64	66	67	70	74	77	79	81	82	83	83	83	84	82	80	76	74	72	70
Dewpoint (°F)	64	63	63	64	64	64	65	65	65	66	65	64	64	64	63	63	64	64	65	65	65	65	66	66
Heat Index (°F)											77	79	83	83	84	84	84	85	84	82	76
Surface Wind (mph)	5	3	3	3	3	3	3	3	3	3	3	3	5	5	5	6	6	6	5	3	3	2	2	2
Wind Dir	SW	SW	SW	SW	SW	SW	W	W	NW	NW	NW	NW	NW	NW	NW	NW	NW	N	NE	NE	E	SE	SE	S
Gust
Sky Cover (%)	79	77	73	67	62	60	57	54	47	39	31	35	38	41	41	40	40	41	42	43	37	32	26	29
Precipitation Potential (%)	35	19	19	19	19	19	19	10	10	10	10	10	10	30	30	30	30	30	30	10	10	10	10	10
Relative Humidity (%)	87	87	90	93	97	100	97	93	84	76	67	60	56	55	51	51	53	51	56	60	69	74	81	87
Rain	Chc	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--
Thunder	SChc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--
Date																								06/05
Hour (EDT)	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
Temperature (°F)	69	67	67	66	65	66	67	70	73	77	80	82	83	84	84	83	82	81	79	77	75	73	71	69
Dewpoint (°F)	65	65	65	65	65	66	66	67	67	67	66	65	65	64	64	63	63	63	63	63	63	64	64	64
Heat Index (°F)										77	82	84	85	85	85	84	83	82	79	77	75
Surface Wind (mph)	2	2	2	2	2	2	2	2	3	3	5	6	6	7	8	8	9	9	9	9	9	8	8	8
Wind Dir	SW	W	W	N	N	N	NE	NE	NE	E	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE
Gust
Sky Cover (%)	31	33	31	28	26	30	35	39	42	44	47	45	43	42	46	51	56	52	48	44	45	46	47	52
Precipitation Potential (%)	10	2	2	2	2	2	2	13	13	13	13	13	13	27	27	27	27	27	27	21	21	21	21	21
Relative Humidity (%)	87	93	93	97	100	100	97	90	81	71	62	56	55	51	51	51	53	54	58	62	66	73	79	84
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc	SChc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	--	--

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