Point Forecast: Reston VA  38.95N 77.36W (Elev. 446 ft)	Last Update: 10:30 am EDT May 22, 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: 1pm Wed, May 22 20242pm Wed, May 22 20243pm Wed, May 22 20244pm Wed, May 22 20245pm Wed, May 22 20246pm Wed, May 22 20247pm Wed, May 22 20248pm Wed, May 22 20249pm Wed, May 22 202410pm Wed, May 22 202411pm Wed, May 22 202412am Thu, May 23 20241am Thu, May 23 20242am Thu, May 23 20243am Thu, May 23 20244am Thu, May 23 20245am Thu, May 23 20246am Thu, May 23 20247am Thu, May 23 20248am Thu, May 23 20249am Thu, May 23 202410am Thu, May 23 202411am Thu, May 23 202412pm Thu, May 23 20241pm Thu, May 23 20242pm Thu, May 23 20243pm Thu, May 23 20244pm Thu, May 23 20245pm Thu, May 23 20246pm Thu, May 23 20247pm Thu, May 23 20248pm Thu, May 23 20249pm Thu, May 23 202410pm Thu, May 23 202411pm Thu, May 23 202412am Fri, May 24 20241am Fri, May 24 20242am Fri, May 24 20243am Fri, May 24 20244am Fri, May 24 20245am Fri, May 24 20246am Fri, May 24 20247am Fri, May 24 20248am Fri, May 24 20249am Fri, May 24 202410am Fri, May 24 202411am Fri, May 24 202412pm Fri, May 24 20241pm Fri, May 24 20242pm Fri, May 24 20243pm Fri, May 24 20244pm Fri, May 24 20245pm Fri, May 24 20246pm Fri, May 24 20247pm Fri, May 24 20248pm Fri, May 24 20249pm Fri, May 24 202410pm Fri, May 24 202411pm Fri, May 24 202412am Sat, May 25 20241am Sat, May 25 20242am Sat, May 25 20243am Sat, May 25 20244am Sat, May 25 20245am Sat, May 25 20246am Sat, May 25 20247am Sat, May 25 20248am Sat, May 25 20249am Sat, May 25 202410am Sat, May 25 202411am Sat, May 25 202412pm Sat, May 25 20241pm Sat, May 25 20242pm Sat, May 25 20243pm Sat, May 25 20244pm Sat, May 25 20245pm Sat, May 25 20246pm Sat, May 25 20247pm Sat, May 25 20248pm Sat, May 25 20249pm Sat, May 25 202410pm Sat, May 25 202411pm Sat, May 25 202412am Sun, May 26 20241am Sun, May 26 20242am Sun, May 26 20243am Sun, May 26 20244am Sun, May 26 20245am Sun, May 26 20246am Sun, May 26 20247am Sun, May 26 20248am Sun, May 26 20249am Sun, May 26 202410am Sun, May 26 202411am Sun, May 26 202412pm Sun, May 26 20241pm Sun, May 26 20242pm Sun, May 26 20243pm Sun, May 26 20244pm Sun, May 26 20245pm Sun, May 26 20246pm Sun, May 26 20247pm Sun, May 26 20248pm Sun, May 26 20249pm Sun, May 26 202410pm Sun, May 26 202411pm Sun, May 26 202412am Mon, May 27 2024

Date	05/22											05/23
Hour (EDT)	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12
Temperature (°F)	83	85	86	86	85	84	82	80	77	76	75	74	73	72	71	70	69	69	70	72	73	75	77	78
Dewpoint (°F)	64	64	64	64	65	66	67	68	68	68	68	67	66	66	65	65	66	66	66	66	66	66	67	66
Heat Index (°F)	84	86	87	87	87	86	85	83	77	76	75											75	77	78
Surface Wind (mph)	7	7	8	8	9	8	8	7	7	6	7	6	6	6	6	5	3	3	3	3	5	5	6	6
Wind Dir	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SW	SW	SW	SW	W	W	W	NW	NW	NW
Gust
Sky Cover (%)	35	42	52	64	59	55	49	69	69	59	57	56	64	51	56	65	73	77	72	73	74	79	85	90
Precipitation Potential (%)	3	5	8	13	19	20	29	31	38	45	31	22	22	23	25	26	33	29	28	26	26	26	51	51
Relative Humidity (%)	53	50	48	48	51	55	61	67	74	76	79	79	79	81	81	84	90	90	87	81	79	74	71	67
Rain	--	--	--	--	SChc	SChc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	--	--	--	--	SChc	SChc	Chc	Chc	Chc	Chc	SChc	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc
Date												05/24
Hour (EDT)	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12
Temperature (°F)	79	80	79	79	78	76	74	73	71	70	69	68	67	67	66	65	65	65	66	67	70	72	75	78
Dewpoint (°F)	66	66	66	66	67	66	66	66	66	66	66	65	65	64	64	63	63	63	63	63	63	64	64	64
Heat Index (°F)	79	82	79	79	78	76																	75	78
Surface Wind (mph)	6	6	6	6	6	6	6	6	6	3	3	3	3	5	5	5	5	5	5	6	6	6	6	6
Wind Dir	NW	W	W	W	W	SW	SW	SW	S	W	W	W	W	W	W	W	W	NW	NW	NW	NW	NW	NW	NW
Gust
Sky Cover (%)	92	88	88	88	93	90	80	73	87	86	83	82	77	71	68	69	64	57	49	41	40	48	46	46
Precipitation Potential (%)	51	76	76	76	70	70	70	64	64	64	50	50	50	36	36	36	30	30	30	24	24	24	24	24
Relative Humidity (%)	64	62	64	64	69	71	76	79	84	87	90	90	93	90	93	93	93	93	90	87	78	76	69	62
Rain	Chc	Ocnl	Ocnl	Ocnl	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc	SChc
Thunder	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Chc	Chc	Chc	--	--	--	--	--	--	--	--	--	--	--

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